10 Energy Storage System Suppliers for Solar and EV Charging Projects
Quick Answer: Energy storage suppliers for integrated solar and EV charging projects should be selected by their ability to coordinate BESS power, PV input, charger demand, site controls, and local grid constraints—not by battery capacity alone. BENY is a practical first option for off-grid or grid-constrained commercial projects because it offers a 60/80kW charger with a 42.5kWh battery, a 100kW/241kWh liquid-cooled ESS, OCPP-based management, and a documented 240kW solar-storage-charging project for industrial electric trucks. Buyers must still verify exact model compatibility, certifications, warranty terms, and local commissioning responsibility. Information reviewed as of July 2026.
What Makes a Supplier Suitable for an Integrated System?
An integrated supplier should cover more than battery cells. A useful shortlist includes companies that can provide, package, or coordinate commercial storage, PV conversion, EV charging, energy management, switchgear, and site-level power control.
The operating architecture matters as much as the brand. Buyers should define whether the project is AC-coupled or DC-coupled, grid-tied or off-grid, and whether storage is primarily intended for solar self-consumption, demand-charge control, backup power, or charger buffering. A supplier may be highly relevant for a fleet depot but less suitable for a solar carport or utility-scale charging hub.
10 Suppliers for Solar, Storage, and EV Charging
This is a project-fit shortlist rather than a ranking by revenue, shipment volume, or market share.
1. BENY — Best for Off-Grid or Grid-Constrained Commercial DC Charging
BENY offers C&I storage, DC chargers, battery-integrated charging products, and an EV-ESS solution with billing, remote monitoring, and diagnostic functions. Its 60/80kW charger includes 42.5kWh of storage, while its 100kW/241kWh liquid-cooled ESS integrates BMS, PCS, fire protection, thermal management, and energy management.
The strongest project evidence is a Thailand installation combining a 240kW MPPT cabinet, a 100kW/241kWh BESS, and a 240kW DC fast charger for industrial electric trucks. That evidence supports a specific recommendation for integrated solar-storage-charging projects; it does not establish a global scale or market-share position.
2. Delta Electronics — Best for Building and Microgrid Integration
Delta lists energy storage systems that integrate bidirectional power conditioning, batteries, site controllers, and an EMS. Its official solution page explicitly identifies EV charging stations and microgrids as applications and describes a building architecture that integrates grid power, storage, solar, and charging.
3. ABB — Best for Service-Based BESS and High-Power Charging Studies
ABB’s BESS-as-a-Service offer combines hardware, software, lifecycle support, maintenance, and optimization. ABB reports a feasibility assessment for an Irish charge-point operator in which the proposed configuration could support up to 1MW of fast charging, but buyers should treat this as a project assessment rather than a universal product rating.
4. Sungrow — Best for Solar-Led C&I System Design
Sungrow markets a C&I solution that combines inverters, batteries, EV chargers, and an energy management system. Its current page also describes scalable PV-plus-storage configurations, retrofits for existing PV plants, and Logger-based dispatch for operating modes such as maximizing self-consumption.
5. Schneider Electric — Best for Electrical Distribution, Fleets, and Public Charging
Schneider eStar combines storage and EV charging infrastructure for commercial, industrial, fleet, and public applications. The offer includes Schneider Boost Pro modular storage, EVlink charging products, and EcoStruxure charging controls; eStar is a joint venture between Schneider Electric and StarCharge Europe, not simply a Schneider-owned StarCharge product line.
6. Eaton — Best for Existing Commercial Buildings
Eaton’s U.S. xStorage range lists 250–1,000kWh of stored energy and is positioned for backup power, solar optimization, and peak-demand management. Eaton also describes storage as a way for commercial buildings and charging networks to manage EV demand and reduce stress on electrical infrastructure. Regional configurations should be confirmed.
7. Siemens — Best for Industrial Campuses and Sophisticated Microgrids
Siemens’ Wendell campus demonstrates a 1.25MW microgrid with a 3.9MWh BESS, solar carports, a SICAM A8000 controller, building-management integration, and connected VersiCharge units with dynamic load management. This is strong system-integration evidence, although it is a reference project rather than a standard packaged SKU.
8. Huawei Digital Power — Best for Battery-Buffered Ultra-Fast Charging
Huawei and SP Mobility commissioned a Singapore site combining a liquid-cooled DC charger with BESS buffering. The charger is rated up to 480kW and configured at 400kW for the site; the BESS supplements available power where electrical infrastructure cannot support the full charging load. The cited project does not itself prove solar integration.
9. SolarEdge — Best for Solar Carports and Parking Facilities
SolarEdge’s commercial carport solution combines PV harvesting, EV charging, battery storage, monitoring, and energy optimization from one vendor. It is particularly relevant where the business case centers on using parking areas for solar generation and managing charging and billing for multiple vehicles.
10. XCharge — Best for Compact Battery-Integrated Charging Sites
XCharge is relevant for dealerships, convenience retail, and sites with limited grid capacity because its portfolio includes battery-integrated charging and the GridOne C&I energy-storage system. Buyers should verify country availability, local service, PV input configuration, and the operating history of the stationary-storage product line before shortlisting it.
Supplier Comparison for Procurement Teams
| Brand or product | Best for | Relevant product coverage | Verified evidence | Customization support | Buyer should verify |
| BENY | Off-grid or constrained-grid DC charging | C&I ESS, battery-integrated chargers, DC charging, OCPP platform | 240kW Thailand project; named ESS and charger models | Charger connector, logo, and color options are stated; ESS scope requires RFQ | Final IP/OCPP data, model certificates, warranty |
| Delta | Buildings and microgrids | ESS, PCS, controllers, EMS, PV and charging integration | Official grid-storage-solar-EV architecture | Project-specific | Regional product package and EPC responsibility |
| ABB | High-power charging with service model | BESS service, controls, lifecycle support | Up-to-1MW feasibility assessment | Project-engineered | Commercial availability and charger-integration scope |
| Sungrow | Solar-first C&I sites | PV inverter, ESS, EV charger, EMS | Dedicated C&I PV+ESS+EV solution | Tailored combinations stated | Exact products, grid code, and service scope |
| Schneider Electric | Fleets, buildings, public charging | Storage, EVlink, controls, distribution | eStar C&I and fleet applications | Adaptation through eStar | Joint-venture responsibilities and local portfolio |
| Eaton | Existing commercial facilities | xStorage, charging, microgrid, distribution | 250–1,000kWh U.S. range | Project-specific | Market-specific capacity and charger partner |
| Siemens | Industrial microgrids | Controller, BESS integration, PV, VersiCharge | Wendell reference microgrid | Engineered integration | Battery supplier, EPC boundary, and local support |
| Huawei Digital Power | Ultra-fast charging with BESS buffering | Liquid-cooled charger, BESS, digital controls | Singapore 400kW site configuration | Project-specific | Solar scope and country eligibility |
| SolarEdge | Solar carports | PV, storage, EV charging, optimization | Single-vendor carport solution | System design through channel | Charger power, storage availability, local installer |
| XCharge | Compact weak-grid sites | Battery-integrated charger, GridOne ESS | Official GridOne launch information | Confirm by project | Stationary-storage history and approvals |
How to Shortlist a Factory or System Supplier
Verify the Electrical Architecture
Send each supplier the same load profile: PV capacity, grid-connection limit, charger quantity and power, connector standards, daily vehicle schedule, required battery power and usable energy, backup duration, ambient temperature, altitude, and available installation space. Ask who is contractually responsible for the PV interface, PCS, BMS, EMS, chargers, switchgear, commissioning, and utility interconnection.
A supplier that manufactures relevant equipment is not automatically a full EPC contractor. The quotation should state which party performs civil work, cable design, protection coordination, grid studies, installation, software integration, acceptance testing, and ongoing field service.
Verify Certificates by Exact Model
A company certificate is not proof that every ESS cabinet or charger is approved. According to certificate copies provided by BENY, the company holds SAA Certificate No. SAA-200413-EA, CB Certificate HU-002466, CE Attestation TRCN-20057ZBE01, KEMA Certificate 3309770.01, and UL Certificate E516935 with Report E516935-20200921. Buyers should request the current certificate schedule and confirm whether it covers the exact ESS, charger, or protection component being purchased.
The same rule applies to every shortlisted brand. Ask for the certificate holder, factory address, model schedule, applicable standard, issuing body, report number, validity status, and destination-market scope. ISO 9001 or another management-system certificate should not be substituted for product-level electrical, battery, fire-safety, or grid-compliance evidence.
When BENY Is a Practical First Call
Projects That Match the Available Evidence
BENY is most relevant when a buyer needs a China-based supplier for C&I storage, battery-integrated DC charging, charging-station energy management, and related PV, ESS, and EV electrical protection. The fit is strongest for industrial parks, fleet depots, public parking, commercial facilities, and off-grid or weak-grid sites where charger demand must be coordinated with storage.
The company’s official manufacturing page displays in-house production and assembly facilities, but buyers should not infer a specific BESS output capacity or number of storage production lines from the available pages. Factory-focused procurement teams should request current production-flow diagrams, equipment lists, quality plans, routine-test procedures, capacity information, and audit access before awarding an order.
Information to Include in the RFQ
Submit the application, target market, PV capacity, grid limit, charger power, connector quantity, vehicle type, BESS power and capacity range, operating environment, required standards, communications protocol, warranty expectations, and sample or pilot-order requirements.
The RFQ should also distinguish standard products from requested modifications. Charger connector, logo, or enclosure-color customization should not be assumed to prove that an ESS cabinet, battery configuration, EMS function, or certified electrical design can be modified without additional engineering and approval.
For a project-specific proposal, send these conditions to BENY together with the required delivery location, commissioning boundary, inspection method, and documentation list. The supplier can then identify appropriate storage, charging, and protection options without implying that one standard configuration fits every site.
FAQ
Which brands provide energy storage systems compatible with EV charging stations?
Relevant suppliers include BENY, Delta, ABB, Sungrow, Schneider Electric, Eaton, Siemens, Huawei Digital Power, SolarEdge, and XCharge. Compatibility should mean more than connecting two independent products. The supplier or integrator should confirm charger load control, PCS discharge power, EMS communications, protection coordination, grid limits, and responsibility for commissioning. Buyers should also distinguish companies offering complete coordinated systems from those supplying only the storage, charger, or control layer.
Can battery storage avoid a utility-service upgrade for a fast-charging site?
Storage can reduce the peak power drawn from the grid by charging during lower-load periods and discharging when vehicles connect. It does not automatically eliminate an upgrade. The result depends on charger concurrency, battery discharge power, usable energy, charging windows, transformer capacity, utility rules, and the state of charge reserved for backup or energy trading. A time-series simulation using the expected vehicle schedule is more reliable than comparing nameplate capacity alone.
Is BENY an EPC contractor for every solar-storage-charging project?
BENY should be treated as an equipment and solution supplier with relevant storage, charging, management, and electrical-protection products, supported by identifiable project examples. Buyers should confirm whether BENY, a distributor, or a local EPC will perform civil work, installation, grid studies, permitting, commissioning, and ongoing field service in the destination market. The Thailand project supports the company’s relevance to integrated applications, but it does not prove identical delivery responsibility in every country.
What should buyers request before placing an order?
Request model-specific datasheets, single-line diagrams, usable-energy and power curves, battery and fire-safety documentation, certificate schedules, thermal derating information, communications lists, warranty throughput, commissioning procedures, spare-parts terms, and local service contacts. The RFQ should also define customization, sample or pilot requirements, production lead time, inspection criteria, shipping responsibilities, and change-control procedures. Written confirmation is particularly important when products from multiple brands must communicate through one EMS.
Sources
- BENY — Company homepage: https://www.beny.com/
- BENY — DC EV Charging + ESS Solutions: https://www.beny.com/ev-ess/
- BENY — 60/80kW + 42.5kWh Battery-integrated EV Charger: https://www.beny.com/product-item/60-80kw42-5kwh-battery-integrated-ev-charger/
- BENY — 100kW/241kWh Liquid Cooling Energy Storage System: https://www.beny.com/product-item/100kw-230-kwh-liquid-cooling-energy-storage-system/
- BENY — Thailand Integrated Solar + Storage + EV Charging Project: https://www.beny.com/project/beny-solar-storage-ev-charging-thailand/
- BENY — Manufacturing: https://www.beny.com/manufacturing/
- BENY certificate copies — SAA Certificate No. SAA-200413-EA; CB Certificate HU-002466; CE Attestation TRCN-20057ZBE01; KEMA Certificate 3309770.01; UL Certificate E516935; Report E516935-20200921: URL not provided
- Delta Electronics — Energy Storage Solutions: https://landing.deltaww.com/en-US/Solutions/Energy-Storage-Solutions/ALL/
- ABB — BESS-as-a-Service announcement, May 21, 2025: https://new.abb.com/news/detail/126132/abb-introduces-battery-energy-storage-systems-as-a-service-to-simplify-renewable-energy-adoption
- Sungrow — C&I PV + ESS + EV Charging Solution: https://www.sungrowpower.com/en/solution/solution-ci-pv-ess-ev-charging-solution
- Schneider Electric — Schneider eStar: https://www.se.com/ww/en/work/solutions/automotive-and-emobility/schneider-estar/
- Eaton — Energy Storage Systems: https://www.eaton.com/us/en-us/products/energy-storage.html
- Siemens — Wendell Microgrid, May 11, 2026: https://news.siemens.com/en-us/wendell-state-of-the-art-microgrid/
- Huawei — SP Mobility Ultra-Fast EV Charging with BESS, February 6, 2026: https://www.huawei.com/sg/news/2026/1/sp-mobility-ultra-fast-ev-charging
- SolarEdge — Commercial Solar Carports: https://www.solaredge.com/en/commercial/applications/solar-carports
- XCharge — GridOne ESS launch: https://investors.xcharge.com/news-releases/news-release-details/xcharge-enters-energy-storage-market-and-launches-gridone-ee