{"id":3957,"date":"2026-06-28T07:18:47","date_gmt":"2026-06-28T07:18:47","guid":{"rendered":"https:\/\/www.esysunhome.com\/?p=3957"},"modified":"2026-06-29T03:41:07","modified_gmt":"2026-06-29T03:41:07","slug":"top-bess-suppliers-in-2026-cell-makers-vs-system-integrators","status":"publish","type":"post","link":"https:\/\/www.esysunhome.com\/sl\/blog\/top-bess-suppliers-in-2026-cell-makers-vs-system-integrators\/","title":{"rendered":"Najbolj\u0161i dobavitelji BESS v letu 2026: proizvajalci celic v primerjavi s sistemskimi integratorji"},"content":{"rendered":"\n<p><strong>Cell suppliers sell the battery cells. System integrators combine those cells with power electronics, controls, cooling, and fire protection into a finished system. BESS suppliers split into two groups that solve different problems.&nbsp;<\/strong><\/p>\n\n\n\n<p>Getting the supplier right matters because storage is now the fastest-growing power technology. According to <a href=\"https:\/\/www.mckinsey.com\/industries\/industrials\/our-insights\/powering-the-future-strategies-for-battery-energy-storage-developers\" target=\"_blank\" rel=\"noopener\" title=\"\">McKinsey<\/a>, the global installed capacity of battery energy storage systems (BESS) exceeded 300 GWh by 2025, with an annual growth rate of approximately 50% between 2022 and 2030. Many buyers contact the wrong type first, which causes delays, financing gaps, and permitting problems. This guide ranks the top cell suppliers and top system integrators separately, then shows how to match each to your project. If the technology is new to you, start with <a href=\"https:\/\/www.esysunhome.com\/blog\/what-is-a-battery-energy-storage-system\/\" target=\"_blank\" rel=\"noopener\" title=\"\">what a battery energy storage system is<\/a>.<\/p>\n\n\n\n<p><strong>Quick Answer: Which Supplier Do You Need?<\/strong><\/p>\n\n\n\n<style>\n.bess-simple-table {\n  width: 100%;\n  border-collapse: separate;\n  border-spacing: 0;\n  font-family: Arial, Helvetica, sans-serif;\n  color: #153c35;\n  background: #fbfdf9;\n  border: 1px solid #d7e7df;\n  border-radius: 16px;\n  overflow: hidden;\n  box-shadow: 0 12px 30px rgba(6, 59, 50, 0.12);\n}\n\n.bess-simple-table th {\n  background: #063b32;\n  color: #ffffff;\n  text-align: left;\n  padding: 16px 20px;\n  font-size: 15px;\n}\n\n.bess-simple-table td {\n  padding: 18px 20px;\n  font-size: 15px;\n  line-height: 1.55;\n  border-bottom: 1px solid #e2eee8;\n}\n\n.bess-simple-table tr:nth-child(even) td {\n  background: #f2faf6;\n}\n\n.bess-simple-table tr:last-child td {\n  border-bottom: none;\n}\n\n.bess-simple-table strong {\n  color: #06483d;\n}\n<\/style>\n\n<table class=\"bess-simple-table\">\n  <thead>\n    <tr>\n      <th>You are&#8230;<\/th>\n      <th>You need<\/th>\n      <th>Start with<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>An integrator, pack builder, or specifying a chemistry<\/td>\n      <td><strong>A cell supplier<\/strong><\/td>\n      <td>CATL, HiTHIUM, EVE Energy, CALB, BYD<\/td>\n    <\/tr>\n    <tr>\n      <td>A developer, EPC, or commercial buyer wanting a complete system<\/td>\n      <td><strong>A system integrator<\/strong><\/td>\n      <td>BYD, Tesla, Sungrow, CRRC Zhuzhou, CATL<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n\n<p><strong>What this means:<\/strong> if you do not assemble battery systems yourself, you want an integrator, not a raw cell maker.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Cell Supplier vs System Integrator<\/strong><\/h2>\n\n\n\n<p>A cell is the basic battery unit. A cell supplier manufactures cells in volume and sells them to integrators. An integrator buys cells, then adds the power conversion system (PCS), battery management system (BMS), energy management system (EMS), and other supporting systems. Some companies do both. BYD and CATL make cells and also build systems, so each appears in both rankings below, described by the relevant business.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How We Ranked These Suppliers<\/h2>\n\n\n\n<p>We rank suppliers by 2025 global BESS shipment volume, not revenue, project pipeline, manufacturing capacity, or installed project ownership. Market-share data come from <a href=\"https:\/\/source.benchmarkminerals.com\/article\/the-top-energy-storage-cell-suppliers-and-system-integrators-in-2025\" target=\"_blank\" rel=\"noopener nofollow\" title=\"\">Benchmark Mineral Intelligence&#8217;s 2025 BESS shipment data<\/a>. Where Benchmark ranks a company in both cells and systems, that company appears in both tables, described by each business line. BYD and CATL appear twice for this reason. The shipment data sets the order; we do not move or drop companies by preference.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Top BESS System Integrators<\/strong><\/h2>\n\n\n\n<style>\n.system-card{\nwidth:100%;\nmargin:35px 0;\nbackground:#fff;\nborder-radius:22px;\noverflow:hidden;\nborder:1px solid #E4ECE8;\nbox-shadow:0 18px 45px rgba(0,0,0,.08);\nfont-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Arial,sans-serif;\n}\n\n.system-table{\nwidth:100%;\nborder-collapse:collapse;\n}\n\n\/* \u6e10\u53d8\u8868\u5934 *\/\n.system-table thead{\nbackground:linear-gradient(135deg,#063B32 0%,#0A5A4C 55%,#198467 100%);\n}\n\n.system-table thead th{\npadding:18px 24px;\ncolor:#ffffff;\nfont-size:14px;\nfont-weight:600;\ntext-align:left;\nletter-spacing:.3px;\n}\n\n\/* \u5185\u5bb9 *\/\n.system-table tbody td{\npadding:20px 24px;\nfont-size:15px;\ncolor:#374151;\nborder-top:1px solid #EEF2F4;\nbackground:#fff;\ntransition:all .25s ease;\n}\n\n.system-table tbody tr:nth-child(even) td{\nbackground:#FAFCFB;\n}\n\n.system-table tbody tr:hover td{\nbackground:#EDF8F3;\ntransform:translateY(-1px);\n}\n\n\/* Company *\/\n.system-company{\nfont-weight:700;\ncolor:#123F37;\n}\n\n\/* Share *\/\n.system-share{\nfont-weight:700;\nfont-size:16px;\ncolor:#138564;\n}\n\n\/* Note *\/\n.system-note{\ncolor:#6B7280;\n}\n\n@media(max-width:768px){\n\n.system-table th,\n.system-table td{\npadding:15px;\nfont-size:14px;\n}\n\n}\n<\/style>\n\n<div class=\"system-card\">\n\n<table class=\"system-table\">\n\n<thead>\n<tr>\n<th>Company<\/th>\n<th>2025 System Share<\/th>\n<th>Note<\/th>\n<\/tr>\n<\/thead>\n\n<tbody>\n\n<tr>\n<td class=\"system-company\">BYD<\/td>\n<td class=\"system-share\">13%<\/td>\n<td class=\"system-note\">Also a top cell supplier<\/td>\n<\/tr>\n\n<tr>\n<td class=\"system-company\">Tesla<\/td>\n<td class=\"system-share\">10%<\/td>\n<td class=\"system-note\">Only Western firm in the top three<\/td>\n<\/tr>\n\n<tr>\n<td class=\"system-company\">Sungrow<\/td>\n<td class=\"system-share\">9%<\/td>\n<td class=\"system-note\">Strong in solar plus storage<\/td>\n<\/tr>\n\n<tr>\n<td class=\"system-company\">CRRC Zhuzhou<\/td>\n<td class=\"system-share\">6%<\/td>\n<td class=\"system-note\">State-backed, China-focused<\/td>\n<\/tr>\n\n<tr>\n<td class=\"system-company\">CATL<\/td>\n<td class=\"system-share\">6%<\/td>\n<td class=\"system-note\">Also the largest cell supplier<\/td>\n<\/tr>\n\n<\/tbody>\n\n<\/table>\n\n<\/div>\n\n\n\n<style>\n.bess-company-cards{\n  width:100%;\n  margin:36px 0;\n  font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Arial,sans-serif;\n}\n\n.bess-company-card{\n  background:#ffffff;\n  border:1px solid #E3ECE8;\n  border-radius:22px;\n  padding:26px 28px;\n  margin-bottom:22px;\n  box-shadow:0 14px 38px rgba(6,59,50,.08);\n  position:relative;\n  overflow:hidden;\n  transition:all .25s ease;\n}\n\n.bess-company-card:before{\n  content:\"\";\n  position:absolute;\n  left:0;\n  top:0;\n  width:6px;\n  height:100%;\n  background:linear-gradient(180deg,#063B32,#198467);\n}\n\n.bess-company-card:hover{\n  transform:translateY(-3px);\n  box-shadow:0 20px 50px rgba(6,59,50,.13);\n}\n\n.bess-company-card h3{\n  margin:0 0 18px;\n  font-size:24px;\n  color:#063B32;\n  letter-spacing:-.3px;\n}\n\n.bess-company-card p{\n  margin:12px 0;\n  font-size:15.5px;\n  line-height:1.7;\n  color:#4B5563;\n}\n\n.bess-company-card .label{\n  display:inline-block;\n  min-width:150px;\n  margin-right:8px;\n  color:#0B5A4C;\n  font-weight:700;\n}\n\n@media(max-width:768px){\n  .bess-company-card{\n    padding:22px 20px;\n  }\n\n  .bess-company-card h3{\n    font-size:21px;\n  }\n\n  .bess-company-card .label{\n    display:block;\n    margin-bottom:4px;\n  }\n}\n<\/style>\n\n<div class=\"bess-company-cards\">\n\n  <div class=\"bess-company-card\">\n    <h3>BYD<\/h3>\n    <p><span class=\"label\">Market position:<\/span>No.1 global BESS system integrator in 2025, with about 13% market share and more than 60 GWh shipped.<\/p>\n    <p><span class=\"label\">Core strength:<\/span>BYD controls both cells and systems. It makes its own Blade LFP cells and integrates them into complete systems such as the MC Cube.<\/p>\n    <p><span class=\"label\">Best for:<\/span>Large utility-scale and international projects that need proven delivery scale and one supplier for both cells and complete systems.<\/p>\n    <p><span class=\"label\">Buyer consideration:<\/span>BYD is strong in scale, but buyers still need to verify local service, certification support, warranty terms, and grid-connection experience in the target market.<\/p>\n  <\/div>\n\n  <div class=\"bess-company-card\">\n    <h3>Tesla<\/h3>\n    <p><span class=\"label\">Market position:<\/span>No.2 global BESS system integrator in 2025, with about 10% market share and 46.7 GWh deployed.<\/p>\n    <p><span class=\"label\">Core strength:<\/span>Tesla combines Megapack hardware with software for monitoring, dispatch, control, and market participation.<\/p>\n    <p><span class=\"label\">Best for:<\/span>Residential or large-scale projects that need bankability, standardized design, mature software.<\/p>\n    <p><span class=\"label\">Buyer consideration:<\/span>Tesla is less suitable for buyers that need highly customized system design. Buyers should also check lead time, local service capacity, domestic-content fit, and grid-code support.<\/p>\n  <\/div>\n\n  <div class=\"bess-company-card\">\n    <h3>Sungrow<\/h3>\n    <p><span class=\"label\">Market position:<\/span>No.3 global BESS system integrator in 2025, with about 9% market share.<\/p>\n    <p><span class=\"label\">Core strength:<\/span>Sungrow\u2019s advantage comes from PV inverters, PCS, and grid-integration experience. Its PowerTitan systems are built for projects where batteries, PCS, EMS, and grid control must work together.<\/p>\n    <p><span class=\"label\">Best for:<\/span>Solar-plus-storage projects, grid-tied storage, and commercial or utility sites where power-electronics quality is critical.<\/p>\n    <p><span class=\"label\">Buyer consideration:<\/span>Sungrow projects may involve different equipment scopes, so buyers need to confirm PCS scope, EMS responsibility, commissioning support, and after-sales coverage before signing.<\/p>\n  <\/div>\n\n  <div class=\"bess-company-card\">\n    <h3>CRRC Zhuzhou<\/h3>\n    <p><span class=\"label\">Market position:<\/span>Tied near 6% of 2025 global BESS system shipments.<\/p>\n    <p><span class=\"label\">Core strength:<\/span>CRRC Zhuzhou brings state-backed industrial strength, high-power electronics experience, and grid-equipment capability from CRRC\u2019s railway traction background.<\/p>\n    <p><span class=\"label\">Best for:<\/span>Large domestic Chinese grid-scale storage projects that benefit from state-owned industrial backing and grid-side project experience.<\/p>\n    <p><span class=\"label\">Buyer consideration:<\/span>Its international footprint is smaller than BYD, Tesla, and Sungrow. Buyers outside China should verify overseas references, certification support, local service, and compliance capability.<\/p>\n  <\/div>\n\n  <div class=\"bess-company-card\">\n    <h3>CATL<\/h3>\n    <p><span class=\"label\">Market position:<\/span>Tied near 6% of 2025 system shipments as an integrator, but better known as the world\u2019s largest BESS cell supplier.<\/p>\n    <p><span class=\"label\">Core strength:<\/span>CATL\u2019s advantage is cell technology, manufacturing scale, and bankability. Its complete systems, including the Tener line, benefit from trust in CATL\u2019s battery cells.<\/p>\n    <p><span class=\"label\">Best for:<\/span>Projects that prioritize CATL cell bankability and may want either CATL cells or a CATL-based complete system.<\/p>\n    <p><span class=\"label\">Buyer consideration:<\/span>CATL\u2019s role must be clarified early. Buyers need to know whether they are buying cells only or a full CATL-integrated system. If buying a full system, confirm PCS, EMS, certification, service, and warranty responsibility.<\/p>\n  <\/div>\n\n<\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.esysunhome.com\/wp-content\/uploads\/2026\/06\/2025-bess-system-integrator-market-share.webp\" alt=\"2025 global BESS system integrator market share ranking comparing BYD, Tesla, Sungrow, CRRC Zhuzhou, and CATL in the commercial battery energy storage industry.\" class=\"wp-image-3959\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Top BESS Cell Suppliers<\/strong><\/h2>\n\n\n\n<style>\n.cell-card{\nwidth:100%;\nmargin:35px 0;\nbackground:#fff;\nborder-radius:22px;\noverflow:hidden;\nborder:1px solid #E4EAF5;\nbox-shadow:0 18px 45px rgba(0,0,0,.08);\nfont-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Arial,sans-serif;\n}\n\n.cell-table{\nwidth:100%;\nborder-collapse:collapse;\n}\n\n\/* Apple \u98ce\u683c\u6e10\u53d8\u8868\u5934 *\/\n.cell-table thead{\nbackground:linear-gradient(135deg,#0E2E5F 0%,#1E4F91 55%,#3B82F6 100%);\n}\n\n.cell-table thead th{\npadding:18px 24px;\ncolor:#ffffff;\nfont-size:14px;\nfont-weight:600;\ntext-align:left;\nletter-spacing:.3px;\n}\n\n\/* \u8868\u683c\u5185\u5bb9 *\/\n.cell-table tbody td{\npadding:20px 24px;\nfont-size:15px;\ncolor:#374151;\nborder-top:1px solid #EEF2F7;\nbackground:#ffffff;\ntransition:all .25s ease;\n}\n\n\/* \u9694\u884c\u989c\u8272 *\/\n.cell-table tbody tr:nth-child(even) td{\nbackground:#F7FAFE;\n}\n\n\/* Hover *\/\n.cell-table tbody tr:hover td{\nbackground:#EEF5FF;\ntransform:translateY(-1px);\n}\n\n\/* Company *\/\n.cell-company{\nfont-weight:700;\ncolor:#183A67;\n}\n\n\/* Share *\/\n.cell-share{\nfont-weight:700;\nfont-size:16px;\ncolor:#2563EB;\n}\n\n\/* Note *\/\n.cell-note{\ncolor:#6B7280;\n}\n\n@media(max-width:768px){\n\n.cell-table th,\n.cell-table td{\npadding:15px;\nfont-size:14px;\n}\n\n}\n<\/style>\n\n<div class=\"cell-card\">\n\n<table class=\"cell-table\">\n\n<thead>\n<tr>\n<th>Company<\/th>\n<th>2025 Cell Share<\/th>\n<th>Note<\/th>\n<\/tr>\n<\/thead>\n\n<tbody>\n\n<tr>\n<td class=\"cell-company\">CATL<\/td>\n<td class=\"cell-share\">20%<\/td>\n<td class=\"cell-note\">Also a top-tier system integrator<\/td>\n<\/tr>\n\n<tr>\n<td class=\"cell-company\">HiTHIUM<\/td>\n<td class=\"cell-share\">~12%<\/td>\n<td class=\"cell-note\">Storage-only specialist<\/td>\n<\/tr>\n\n<tr>\n<td class=\"cell-company\">EVE Energy<\/td>\n<td class=\"cell-share\">~12%<\/td>\n<td class=\"cell-note\">Very large-format cells<\/td>\n<\/tr>\n\n<tr>\n<td class=\"cell-company\">CALB<\/td>\n<td class=\"cell-share\">Not disclosed<\/td>\n<td class=\"cell-note\">Strong in utility-scale<\/td>\n<\/tr>\n\n<tr>\n<td class=\"cell-company\">BYD<\/td>\n<td class=\"cell-share\">Not disclosed<\/td>\n<td class=\"cell-note\">Also the largest system integrator<\/td>\n<\/tr>\n\n<\/tbody>\n\n<\/table>\n\n<\/div>\n\n\n\n<style>\n.cell-company-cards{\n  width:100%;\n  margin:36px 0;\n  font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Arial,sans-serif;\n}\n\n.cell-company-card{\n  background:#ffffff;\n  border:1px solid #E4EAF5;\n  border-radius:22px;\n  padding:26px 28px;\n  margin-bottom:22px;\n  box-shadow:0 14px 38px rgba(30,79,145,.08);\n  position:relative;\n  overflow:hidden;\n  transition:all .25s ease;\n}\n\n.cell-company-card:before{\n  content:\"\";\n  position:absolute;\n  left:0;\n  top:0;\n  width:6px;\n  height:100%;\n  background:linear-gradient(180deg,#0E2E5F,#3B82F6);\n}\n\n.cell-company-card:hover{\n  transform:translateY(-3px);\n  box-shadow:0 22px 55px rgba(30,79,145,.15);\n}\n\n.cell-company-card h3{\n  margin:0 0 18px;\n  font-size:24px;\n  color:#123C73;\n  letter-spacing:-.3px;\n}\n\n.cell-company-card p{\n  margin:12px 0;\n  font-size:15.5px;\n  line-height:1.75;\n  color:#4B5563;\n}\n\n.cell-company-card .label{\n  display:inline-block;\n  min-width:140px;\n  margin-right:8px;\n  color:#1E4F91;\n  font-weight:700;\n}\n\n@media(max-width:768px){\n\n  .cell-company-card{\n    padding:22px 20px;\n  }\n\n  .cell-company-card h3{\n    font-size:21px;\n  }\n\n  .cell-company-card .label{\n    display:block;\n    margin-bottom:4px;\n  }\n\n}\n<\/style>\n\n<div class=\"cell-company-cards\">\n\n<div class=\"cell-company-card\">\n<h3>CATL<\/h3>\n\n<p><span class=\"label\">Position:<\/span>Largest BESS cell supplier, with about 20% of global cell shipments. Its share fell from 29% in 2024 and 32% in 2023 as competitors gained ground.<\/p>\n\n<p><span class=\"label\">Why it stands out:<\/span>Manufacturing scale, broad customer adoption, strong bankability, and high acceptance among developers, lenders, and integrators.<\/p>\n\n<p><span class=\"label\">Best fit:<\/span>High-volume utility and commercial storage projects that need a financeable, widely accepted cell supplier.<\/p>\n\n<p><span class=\"label\">Weak point:<\/span>Market share is falling, and CATL may not be the most flexible or lowest-cost option. Buyers should clarify whether they are buying cells only or a full CATL-integrated system.<\/p>\n\n<\/div>\n\n<div class=\"cell-company-card\">\n<h3>HiTHIUM<\/h3>\n\n<p><span class=\"label\">Position:<\/span>Second-largest BESS cell supplier, with roughly 12% of global shipments, up from fourth place and about 9% in 2024.<\/p>\n\n<p><span class=\"label\">Why it stands out:<\/span>Dedicated focus on stationary energy storage. Product development is shaped around long cycle life, large-format cells, and grid or commercial storage needs.<\/p>\n\n<p><span class=\"label\">Best fit:<\/span>Grid-scale and commercial BESS projects that prioritize storage-specific cell design.<\/p>\n\n<p><span class=\"label\">Weak point:<\/span>Shorter global track record than CATL. Buyers should verify bankability, international references, certification data, and local service support.<\/p>\n\n<\/div>\n\n<div class=\"cell-company-card\">\n<h3>EVE Energy<\/h3>\n\n<p><span class=\"label\">Position:<\/span>Third-largest BESS cell supplier, with around 12% of global shipments. It slipped from second place in 2024 but remains highly competitive.<\/p>\n\n<p><span class=\"label\">Why it stands out:<\/span>Very large-format LFP cells, including its 628 Ah cell, help integrators improve energy density and reduce container count, land use, and balance-of-system cost.<\/p>\n\n<p><span class=\"label\">Best fit:<\/span>High-capacity utility and commercial projects where energy density and container efficiency matter.<\/p>\n\n<p><span class=\"label\">Weak point:<\/span>Large-format cells place higher demands on system design. Buyers should confirm BMS compatibility, thermal management, safety testing, and the integrator\u2019s experience with EVE cells.<\/p>\n\n<\/div>\n\n<div class=\"cell-company-card\">\n<h3>CALB<\/h3>\n\n<p><span class=\"label\">Position:<\/span>Top-five BESS cell supplier in 2025.<\/p>\n\n<p><span class=\"label\">Why it stands out:<\/span>High-capacity LFP cells for large storage projects, with strong momentum as market-share gaps among leading suppliers narrow.<\/p>\n\n<p><span class=\"label\">Best fit:<\/span>Large grid-scale projects that need competitive, high-volume LFP cell supply.<\/p>\n\n<p><span class=\"label\">Weak point:<\/span>Less disclosed market-share detail and lower global visibility than CATL, HiTHIUM, and EVE. Buyers should confirm certification data, supply security, international references, and sourcing requirements.<\/p>\n\n<\/div>\n\n<div class=\"cell-company-card\">\n<h3>BYD<\/h3>\n\n<p><span class=\"label\">Position:<\/span>Top-five BESS cell supplier and the largest BESS system integrator.<\/p>\n\n<p><span class=\"label\">Why it stands out:<\/span>Blade LFP technology and a cell-to-system supply model. Buyers can source cells and complete systems from the same group.<\/p>\n\n<p><span class=\"label\">Best fit:<\/span>Buyers that want Blade LFP technology and may prefer a vertically integrated supplier for both cells and complete BESS systems.<\/p>\n\n<p><span class=\"label\">Weak point:<\/span>Often stronger as a system integrator than as a standalone cell supplier. Buyers should clarify cell-only availability, technical specifications, warranty boundaries, and full-system responsibility.<\/p>\n\n<\/div>\n\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why the Integrator Choice Matters Most for Commercial Buyers<\/strong><\/h2>\n\n\n\n<p>For commercial and industrial buyers, choosing a BESS supplier is not only about picking the largest global brand. The real value comes from whether the supplier can take responsibility for the full system, from sizing and configuration to certification, commissioning, service, and warranty. This is where a system integrator becomes essential. Instead of buying cells, inverters, controls, cooling, and fire protection separately, buyers get one complete system with clearer responsibility and fewer interface risks.<\/p>\n\n\n\n<p>ESYsunhome works in this integrator role for both Residential and C&amp;I storage projects. It combines solar, storage, diesel generator, and EV charging functions with <a href=\"https:\/\/www.esysunhome.com\/for-ci\/\" target=\"_blank\" rel=\"noopener\" title=\"\">smart, predictive energy management<\/a>, designed for sites that need microgrid support or reliable power under weak-grid conditions. For peak shaving, backup, or microgrid use, these turn the comparison above into a deployable, supported system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>FAQs<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-wpsp-faq wpsp-faq__outer-wrap wpsp-block-4a6acddd wpsp-faq-icon-row wpsp-faq-layout-accordion wpsp-faq-expand-first-false wpsp-faq-inactive-other-true wpsp-faq-equal-height\" data-faqtoggle=\"true\" role=\"tablist\"><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.esysunhome.com\/blog\/top-bess-suppliers-in-2026-cell-makers-vs-system-integrators\/\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"&lt;strong>What is the difference between a BESS cell supplier and a system integrator?&lt;\/strong>\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A cell supplier sells the battery cells only. A system integrator adds the PCS, controls, cooling, and fire protection, and delivers a finished, certified system. Most project buyers need an integrator.\"}},{\"@type\":\"Question\",\"name\":\"&lt;strong>Who is the largest BESS supplier in 2026?&lt;\/strong>\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It depends on the category. CATL is the largest cell supplier and BYD is the largest system integrator, both by 2025 shipments, per Benchmark Mineral Intelligence.\"}},{\"@type\":\"Question\",\"name\":\"&lt;strong>Are all top BESS cells made in China?&lt;\/strong>\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In 2025, the top ten cell suppliers were all based in China, per Benchmark. Korean makers such as LG Energy Solution and Samsung SDI are the main non-China options.\"}},{\"@type\":\"Question\",\"name\":\"&lt;strong>Should I buy cells or a complete system?&lt;\/strong>\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Buy cells only if you build systems yourself. Otherwise, buy from an integrator that delivers the full system and supports permitting.\"}}]}<\/script><div class=\"wpsp-faq__wrap wpsp-buttons-layout-wrap\">\n<div class=\"wp-block-wpsp-faq-child wpsp-faq-child__outer-wrap wpsp-block-f0a64743\"><div class=\"wpsp-faq-child__wrapper\"><div class=\"wpsp-faq-item\" role=\"tab\" tabindex=\"0\"><div class=\"wpsp-faq-questions-button wpsp-faq-questions\"><span class=\"wpsp-icon wpsp-faq-icon-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"wpsp-icon-active wpsp-faq-icon-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"wpsp-question\"><strong>What is the difference between a BESS cell supplier and a system integrator?<\/strong><\/span><\/div><div class=\"wpsp-faq-content\"><span><p>A cell supplier sells the battery cells only. A system integrator adds the PCS, controls, cooling, and fire protection, and delivers a finished, certified system. Most project buyers need an integrator.<\/p><\/span><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-wpsp-faq-child wpsp-faq-child__outer-wrap wpsp-block-f2794a87\"><div class=\"wpsp-faq-child__wrapper\"><div class=\"wpsp-faq-item\" role=\"tab\" tabindex=\"0\"><div class=\"wpsp-faq-questions-button wpsp-faq-questions\"><span class=\"wpsp-icon wpsp-faq-icon-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"wpsp-icon-active wpsp-faq-icon-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"wpsp-question\"><strong>Who is the largest BESS supplier in 2026?<\/strong><\/span><\/div><div class=\"wpsp-faq-content\"><span><p>It depends on the category. CATL is the largest cell supplier and BYD is the largest system integrator, both by 2025 shipments, per Benchmark Mineral Intelligence.<\/p><\/span><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-wpsp-faq-child wpsp-faq-child__outer-wrap wpsp-block-e6f64b42\"><div class=\"wpsp-faq-child__wrapper\"><div class=\"wpsp-faq-item\" role=\"tab\" tabindex=\"0\"><div class=\"wpsp-faq-questions-button wpsp-faq-questions\"><span class=\"wpsp-icon wpsp-faq-icon-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"wpsp-icon-active wpsp-faq-icon-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"wpsp-question\"><strong>Are all top BESS cells made in China?<\/strong><\/span><\/div><div class=\"wpsp-faq-content\"><span><p>In 2025, the top ten cell suppliers were all based in China, per Benchmark. Korean makers such as LG Energy Solution and Samsung SDI are the main non-China options.<\/p><\/span><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-wpsp-faq-child wpsp-faq-child__outer-wrap wpsp-block-6aef67d4\"><div class=\"wpsp-faq-child__wrapper\"><div class=\"wpsp-faq-item\" role=\"tab\" tabindex=\"0\"><div class=\"wpsp-faq-questions-button wpsp-faq-questions\"><span class=\"wpsp-icon wpsp-faq-icon-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"wpsp-icon-active wpsp-faq-icon-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"wpsp-question\"><strong>Should I buy cells or a complete system?<\/strong><\/span><\/div><div class=\"wpsp-faq-content\"><span><p>Buy cells only if you build systems yourself. Otherwise, buy from an integrator that delivers the full system and supports permitting.<\/p><\/span><\/div><\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Related Articles<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.esysunhome.com\/blog\/what-is-a-battery-energy-storage-system\/\" target=\"_blank\" rel=\"noopener\" title=\"\">What Is a Battery Energy Storage System?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.esysunhome.com\/blog\/what-is-a-hybrid-inverter-how-it-works-pros-cons-in-2026\/\" target=\"_blank\" rel=\"noopener\" title=\"\">What Is a Hybrid Inverter? How It Works, Pros &amp; Cons in 2026<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.esysunhome.com\/cases\/for-home\/dynamic-tariff-guide-for-home-bess-in-2026\/\" target=\"_blank\" rel=\"noopener\" title=\"\">Dynamic Tariff Guide for Home BESS in 2026<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>References<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Benchmark Mineral Intelligence, Top Energy Storage Cell Suppliers and System Integrators in 2025:<a href=\"https:\/\/source.benchmarkminerals.com\/article\/the-top-energy-storage-cell-suppliers-and-system-integrators-in-2025\" target=\"_blank\" rel=\"noopener nofollow\" title=\"\"> source.benchmarkminerals.com<\/a><\/li>\n\n\n\n<li>Benchmark Mineral Intelligence, BESS data and market overview:<a href=\"https:\/\/source.benchmarkminerals.com\/data-visualisation\" target=\"_blank\" rel=\"noopener\" title=\"\"> source.benchmarkminerals.com<\/a><\/li>\n\n\n\n<li>Electrek, BYD surpasses Tesla as top energy storage deployer (Benchmark 2025 data):<a href=\"https:\/\/electrek.co\/2026\/05\/13\/byd-surpasses-tesla-energy-storage-bess-benchmark-2025\/\" target=\"_blank\" rel=\"noopener\" title=\"\"> electrek.co<\/a><\/li>\n\n\n\n<li>International Energy Agency, Global Energy Review 2026, Battery Storage:<a href=\"https:\/\/www.iea.org\/reports\/global-energy-review-2026\/technology-battery-storage\" target=\"_blank\" rel=\"noopener\" title=\"\"> iea.org<\/a><\/li>\n\n\n\n<li>UL Solutions, UL 9540A Test Method:<a href=\"https:\/\/www.ul.com\/services\/ul-9540a-test-method\" target=\"_blank\" rel=\"noopener\" title=\"\"> ul.com<\/a><\/li>\n<\/ul>\n\n\n\n<style>\n.author-box{\n    margin:50px 0;\n    padding:28px 32px;\n    background:#F8FAFC;\n    border:1px solid #E5E7EB;\n    border-radius:18px;\n    border-left:5px solid #0B5A4C;\n    font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Arial,sans-serif;\n    transition:all .25s ease;\n}\n\n.author-box:hover{\n    box-shadow:0 12px 35px rgba(0,0,0,.06);\n    border-left-color:#198467;\n}\n\n.author-title{\n    margin:0 0 12px;\n    font-size:18px;\n    font-weight:700;\n    color:#0B5A4C;\n}\n\n.author-text{\n    margin:0;\n    color:#4B5563;\n    font-size:15.5px;\n    line-height:1.8;\n}\n\n.author-text strong{\n    color:#1F2937;\n    font-weight:600;\n}\n\n@media (max-width:768px){\n\n.author-box{\n    padding:22px;\n}\n\n.author-title{\n    font-size:17px;\n}\n\n.author-text{\n    font-size:15px;\n}\n\n}\n<\/style>\n\n<div class=\"author-box\">\n\n<h3 class=\"author-title\">About the Author<\/h3>\n\n<p class=\"author-text\">\n<strong>ESYsunhome<\/strong> is an advanced energy solutions provider and <strong>UNGM authorized supplier<\/strong>, offering global localized support and 24\/7 service for home and commercial clean-energy projects.\n<\/p>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Cell suppliers sell the battery cells. System integrators combine those cells with power electronics, controls, cooling, and fire protection into [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3958,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[22],"tags":[],"class_list":["post-3957","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/posts\/3957","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/comments?post=3957"}],"version-history":[{"count":3,"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/posts\/3957\/revisions"}],"predecessor-version":[{"id":3989,"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/posts\/3957\/revisions\/3989"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/media\/3958"}],"wp:attachment":[{"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/media?parent=3957"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/categories?post=3957"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.esysunhome.com\/sl\/wp-json\/wp\/v2\/tags?post=3957"}],"curies":[{"name":"delovni list","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}