Rethinking C&I Energy Storage: Simpler Architecture, Higher Returns

The global energy storage systems market was valued at approximately USD 668.7 billion in 2024 and is projected to reach USD 5.12 trillion by 2034, according to Global Market Insights. Within this rapidly growing space, commercial and industrial (C&I) energy storage buyers face a dual challenge: managing upfront capital costs while ensuring long-term operational reliability and revenue stacking capability. SolisStorage — the energy storage subsidiary of Ginlong (Solis) Technologies Co., Ltd. — addresses these demands with its EverCore series, a long-duration C&I energy storage system designed around architectural simplicity without compromising on intelligence or safety.

Market Opportunity and Buyer Pain Points

The Long-Duration Energy Storage (LDES) market was valued at USD 4.85 billion in 2024 and is expected to grow at a CAGR of 13.6% through 2030 (MarketsandMarkets). C&I facilities are increasingly seeking systems that can deliver 4–8 hours of discharge for peak shaving, backup power, and grid service participation. However, many existing solutions suffer from design complexity, high maintenance overhead, and limited software openness — factors that erode project IRR over a typical 10–15 year lifecycle.

Buyers evaluating C&I energy storage systems now prioritize:

• Total cost of ownership (TCO), not just initial price
• Seamless integration with existing PV and grid infrastructure
• Multi-revenue capability via VPP, demand response, and ancillary services
• High safety standards and insurability

EverCore: AC-DC Separation as a Foundational Innovation

SolisStorage EverCore is a modular C&I energy storage system (ESS) that physically separates AC and DC components — the hybrid inverter (AC side) is housed independently from the battery cabinet (DC side). This AC-DC separation architecture delivers three concrete benefits:

1. Thermal separation — Only 3.5 kW of electrochemical heat is managed inside the battery cabinet (vs. 6 kW inverter heat dissipated externally), allowing EverCore to achieve temperature uniformity close to liquid-cooled designs while retaining a simpler air-cooled system.
2. Protection separation — The inverter achieves IP66 (dust-tight, protected against powerful water jets) and the battery cabinet IP55. Based on 20 years of power electronics experience, the separated design reduces the system’s full-lifecycle failure rate by an estimated 50%.
3. Structural separation — A single inverter can connect up to 6 battery cabinets in parallel, enabling linear DC-side expansion without additional inverter investment, reducing system expansion costs by approximately 10%.

Technical Architecture: Highest Power Density Meets Air-Cooling Comeback

EverCore’s 50–125 kW hybrid inverter integrates PCS, STS, PV inverter, circuit breaker protection, and EMS into a single unit — achieving the highest power density in its class. Key technical details include:

• Seamless grid-tied/off-grid switching in less than 10 ms without an external STS, protecting sensitive industrial loads.
• DC + AC coupling support for existing PV systems, with a PV over-sizing ratio of up to 200%.
• Single-CPU centralized control — eliminates the complexity of multi-node BMS/PCS/EMS/STS communication and simplifies fault diagnosis.

A notable engineering achievement is EverCore’s air-cooling system, which disproves the industry stereotype that large-capacity cells require liquid cooling. An independent three-air-duct design, combining a patented diversion air duct and Coanda Effect airflow technology, improves heat dissipation efficiency by 30% compared to traditional air cooling. The system operates reliably in extreme temperatures from -25°C to 55°C and at altitudes up to 4,000 meters.

Real-World Applications

Two deployed projects illustrate EverCore’s versatility:

Open Software Ecosystem for Multi-Revenue Markets

In mature electricity markets, C&I energy storage profitability relies on participation in multiple revenue streams: peak shaving, FCR/aFRR/mFRR, demand response, and VPP dispatch. EverCore is designed with a highly open software ecosystem. It has been connected or is in process of connecting with 102 third-party VPP/EMS operators across 11 European countries. Notable integrations include Octopus Energy’s Kraken platform (UK) and Check Watt (Nordic region). Solis AI Cloud Platform, deployed at over 5,500 storage sites globally, integrates Nordpool and Flatpeak price data for minute-level dynamic charge-discharge optimization.

Comparison with Traditional Liquid-Cooled Systems

Compared to conventional liquid-cooled C&I ESS, EverCore’s air-cooled, AC-DC separated design offers lower lifecycle O&M costs. Based on industry experience, the system saves approximately €9,500 per unit over the project lifecycle by eliminating coolant replacement, simplifying PCS and pack replacements, and reducing inspection complexity. However, a limitation of the air-cooled approach is that in extreme continuous high-power discharge scenarios (e.g., full 125 kW output for >2 hours in ambient >50°C), liquid cooling can still provide more stable temperature control. EverCore’s thermal management is optimized for daily cycling and typical peak shaving patterns, meeting the needs of the vast majority of C&I applications.

Future Outlook

As C&I energy storage becomes a standard building asset, the market will demand systems that are simultaneously simpler in hardware and smarter in software. EverCore’s architectural approach — reducing failure points through separation, while enabling multi-revenue participation through an open ecosystem — positions it well for the next wave of deployment. The growing long-duration storage market and increasing VPP aggregation will further reward platforms with proven field performance and extensive third-party integrations.

Frequently Asked Questions

This article is for informational purposes only. All product claims are based on manufacturer data and third-party certifications as stated. © 2026 HTNXT