Growatt Launches C&I Storage System with 95% Depth of Discharge

Why It Matters

The high depth‑of‑discharge and modular scaling give C&I operators more usable energy per battery, lowering the levelized cost of storage and enabling flexible grid services.

Key Takeaways

• 95% depth of discharge maximizes usable energy
• Scalable to 1.25 MW/2.61 MWh with ten units
• 160% overload capacity for 10 seconds
• 10 ms switch between on‑grid and off‑grid modes
• Supports unbalanced three‑phase loads and generator input

Pulse Analysis

The commercial‑and‑industrial (C&I) storage market is rapidly maturing as utilities and large energy users seek to defer grid upgrades and capture value from time‑of‑use tariffs. A key barrier has been the limited usable capacity of many battery systems, which often restrict depth‑of‑discharge to 80 % to preserve cycle life. Growatt’s RISE 261H‑XH pushes that limit to 95 %, effectively delivering more kilowatt‑hours per installed kilowatt‑hour and improving the economics of each project. Coupled with a liquid‑cooled LFP pack, the system maintains thermal uniformity, a factor that directly influences longevity and performance under harsh operating conditions.

Beyond the high depth‑of‑discharge, the RISE series offers a versatile architecture. The PCS uses smart air cooling and can sustain a 160 % overload for ten seconds, ensuring resilience during short‑term demand spikes. Fast 10 ms on‑grid/off‑grid switching and support for 100 % three‑phase unbalanced loads make the unit suitable for backup power, peak‑shaving, and hybrid diesel‑generator configurations. Its modular design—four power‑rating options that can be stacked up to ten units—allows developers to size projects from 50 kW up to 1.25 MW, simplifying engineering and reducing upfront capital outlay.

For the broader market, Growatt’s entry signals intensified competition among Chinese OEMs to provide turnkey, high‑performance storage solutions for Western customers. The combination of a high depth‑of‑discharge, robust overload capability, and flexible integration options positions the RISE 261H‑XH as a compelling choice for enterprises looking to monetize excess solar generation, improve resiliency, and participate in ancillary grid services. As more C&I sites adopt such systems, the aggregate effect could accelerate the shift toward decentralized energy resources and reshape utility planning strategies.