Sungrow 225kWh battery for businesses and housing companies

Sungrow ST225kWh battery

Sungrow ST225 – Industrial-scale energy storage without compromise

The Sungrow ST225 is a top-of-the-line industrial and commercial battery storage system that combines high energy density, smart energy management, and exceptional reliability – all in one compact package.

The Sungrow ST225 is a liquid-cooled all-in-one energy storage system with a nominal capacity of 225 kWh and a power output of 110 kW. It is specifically designed for commercial and industrial (C&I) use in Finland and Europe.

The system ensures excellent temperature balance and a long battery life. High efficiency, fast installation, and top-tier safety make the Sungrow ST225 one of the best solutions on the market for complementing solar power systems or for independent electricity price optimization in larger facilities.

Features:

• Up to 98.6% PCS efficiency and over 90% round-trip efficiency (RTE)
• Smart liquid cooling + AI-bionic thermal balance – up to 33% lower heat loss and cell temperature differences less than 2.2 °C
• Exceptional safety: Three-level overcurrent protection, AI-based cell health monitoring, and advanced fire safety
• Easy and fast commissioning: Fully integrated all-in-one cabinet (PCS + batteries + cooling), factory pre-tested – minimizes installation costs
• Modular and scalable: Easy parallel connection for up to 10 systems
• Durable and reliable: LFP cells, IP55 protection class, C3 corrosion protection, and wide operating temperature range (-30 °C … +50 °C)

The Sungrow ST225 helps your company reduce electricity bills, improve energy self-sufficiency, and participate in flexibility markets. The reliable technology from the world's leading inverter manufacturer ensures a long lifespan and low maintenance costs.

Battery / DC

• Cell type: LFP (LiFePO4)
• System battery configuration: 256S1P
• Nominal capacity: 229 kWh (often advertised as rounded to 225 kWh)
• Nominal voltage range: 691.2 V – 934.4 V
• Cell voltage: 3.2 V / 280 Ah
• Inverter / AC side (on-grid)
• Nominal power (PCS): 110 kW
• Nominal voltage: 400 V (3-phase)
• Voltage range: 340 V – 440 V
• Nominal frequency: 50 Hz / 60 Hz
• Frequency range: 45–55 Hz / 55–65 Hz
• Current harmonic distortion (THD): < 3% (at nominal power)
• System round-trip efficiency (RTE): ≥ 90%
• PCS efficiency: max. 98.5%

System information

• Liquid Cooling + AI-bionic thermal balance
• Cell temperature difference: ≤ 2.2–2.5 °C
• Operating temperature range: -30 °C … +50 °C (derating above +45 °C)
• Protection class: IP55
• Corrosion protection: C3 (standard), C5 optional
• Installation altitude: max. 3000 m
• Dimensions (W x H x D): 1150 mm × 2450 mm × 1610 mm (ESS cabinet)
• Weight: 1500kg
• Installation: Outdoor (floor standing)

Safety

• Three-level overcurrent protection (PACK, RACK, PCS)
• AI-based cell health monitoring (early warning for thermal issues)
• Advanced fire safety (aerosol extinguishing system)
• Modular design: easy parallel connection (max. 10 systems)
• Pre-installed all-in-one cabinet (PCS + batteries + liquid cooling + distribution box)
• Communication: Ethernet, Modbus TCP, etc.
• Auxiliary power: Internal as standard, external as optional

The battery can be connected to commercial EMS systems and virtual power plants, including the Woltti EMS system, enabling effective participation in reserve markets.

Price optimization, grid support services, solar energy optimization – all in one high-quality package.