Sungrow PowerStack ST245CS-S-2H Commercial Battery Storage - 5Y Warranty

The ST245CS-S-2H pairs with the Sungrow SH125CX hybrid inverter, which manages charging, discharging and power conversion.

The cabinet integrates the battery, cooling, battery management and protection equipment. The SH125CX inverter is a separate system component.

• Solar self-consumption: store surplus generation for use when demand rises or solar output falls.
• Peak shaving: discharge stored energy to limit peak grid demand and reduce applicable charges.
• Load shifting: schedule charging and discharging around operating hours and electricity tariffs.
• Renewable integration: coordinate solar, storage and site loads to make better use of available generation.

Savings depend on site consumption, electricity tariffs and system settings.

The SH125CX and ST245CS-S combination integrates solar, battery storage and diesel generation for grid-connected, backup and off-grid applications, with seamless switching in supported configurations.

Backup performance depends on the inverter arrangement, connected loads, protection, controls and available battery energy. Coordinated use of solar and storage can also reduce diesel consumption.

Sungrow states that supported systems can serve facility demands of up to 250 kW without an additional automatic transfer switch (ATS) cabinet, simplifying installation and reducing upfront costs. This capability applies to the complete system, rather than an individual battery cabinet.

Sungrow’s wider PowerStack solution supports:

• VPP participation: coordinated energy management through supported aggregation arrangements.
• Demand control: management of site import and demand targets.
• VSG operation: inverter controls supporting electrical-system stability.
• Backup and seamless switching: supply to supported loads during operating-mode changes.
• Black start: restarting a suitably designed system without grid power.

Available functions depend on the inverter, battery, controller and firmware configuration.

Intelligent liquid cooling maintains a cell temperature difference of ≤2.5°C, supporting balanced operation and helping limit uneven battery ageing.

AI-controlled thermal balancing reduces daily system heat loss by 33%, according to Sungrow, supporting efficient thermal management.

LFP battery chemistry, integrated battery management and AI-assisted cell monitoring support safe operation and early warning of potential thermal runaway.

Electrical protection includes rapid overcurrent interruption and arc-extinguishing protection to help manage electrical faults.

The three-level fire-prevention design incorporates:

• Combustible-gas, smoke and heat detection.
• An audible alarm.
• Hot aerosol fire suppression.

Together, these measures provide detection, warning and suppression within the cabinet.

Pre-installation and pre-commissioning reduce on-site work, while the integrated cabinet simplifies installation of the battery, cooling, management and protection systems.

Sungrow’s wider solution supports single-unit and multi-cabinet installations, subject to approved inverter arrangements and system controls.

Battery capacity and inverter power must be sized together: additional storage increases available energy, but does not automatically increase output power.

The iSolarCloud app and web portal provide system monitoring, real-time alarms and troubleshooting.

Local and remote wireless maintenance, including one-key remote upgrades, helps installers investigate faults and complete supported tasks with fewer site visits.

Suitable system applications include:

• Retail and offices: self-consumption, demand management and backup.
• Agriculture: irrigation, refrigeration and processing loads.
• Warehouses and logistics: load shifting around operating schedules.
• Manufacturing: demand management and selected critical loads.
• Remote sites: coordinated solar, storage and generator operation.