Solplanet ASW 125 K / 261-PT - 125 kW energy storage system

Solplanet ASW 125K/261-PT is an all-in-one industrial energy storage system for commercial and industrial facilities. A PCS power converter, a 261 kWh lithium iron phosphate battery and a local EMS controller are assembled in one housing. The rated output power is 125 kW at a three-phase voltage of 400 V, which is enough to power an entire workshop, office center or retail facility.

What problems does this system solve?

• Peak shaving – the battery is charged during off-peak hours or from a solar power plant, and picks up the load during peak hours. This reduces the maximum power the utility pays for, significantly reducing bills.

• Load shifting – charging from a cheaper nighttime tariff and discharging during the day when electricity is more expensive.

• Commercial use and sale of electricity – in combination with solar power plants, the system allows you to accumulate excess generation and sell it to the market during high-price hours, as well as participate in balancing programs and network services.

• Backup power supply for critical consumers - supporting the operation of IT infrastructure, servers, refrigeration equipment, and pumping stations during accidents and outages.

For owners of large solar power plants and energy-intensive businesses, this is a tool not only for saving money, but also for earning money through flexible energy management.

Design and key features

ASW 125K/261-PT is a ready-made cabinet with a fully assembled battery, power electronics and control system.

• Battery type: LiFePO₄ (3.2 V, 314 Ah) with modular structure (52 kWh per module, 1P260S configuration).

• Total energy capacity: 261 kWh; nominal PCS power: 125 kW, maximum apparent power – 137.5 kVA.

• Battery operating voltage: 728–936 V, nominal 832 V – optimal for highly efficient three-phase operation.

• Charge/discharge rate: 0.5C – balanced mode, which provides a resource of ≥8000 cycles and allows the system to operate for many years without significant degradation.

• Cooling: liquid, with separate zones for power modules and batteries, which stabilizes the temperature and allows operation in the range from -25 to +55 °C.

• Degree of protection: IP55 and anti-corrosion class C4 with option C5 – the cabinet is designed for harsh industrial conditions and outdoor installation.

Dimensions of 1300×1400×2350 mm and a weight of 2.8 tons make the system compact for its class: no separate battery rooms are required - a prepared area or technical room is enough.

Industry-standard security

Solplanet pays special attention to safety. The ASW 125K/261-PT implements several levels of protection:

• electrical protection against overload, short circuit, overvoltage and frequency deviation;

• separate monitoring of each PACK module with local alarms and cut-off in case of parameter deviations - this prevents the malfunction from "spreading" throughout the entire battery;

• zone-isolated housing and liquid cooling that reduce the risk of overheating and thermal throttling;

• built-in aerosol fire extinguishing system that automatically responds to critical events inside the cabinet.

Additionally, the system supports overload up to 110% of capacity for a long time, which is important for real industrial schedules where the load often “jumps”.

Intelligent control and service

Inside the cabinet, a local EMS operates, coordinating the PCS, battery modules, and grid interaction. It collects real-time data, optimizes charge/discharge cycles, maintains statistics, and generates alerts.

The system supports CAN, RS485, Ethernet and 4G interfaces, which allows it to be integrated with SCADA, building BMS, commercial meters and Solplanet cloud monitoring. Based on this data, predictive (AI-oriented) maintenance scenarios are implemented: the equipment “warns” in advance of deviations, which reduces the risk of downtime and unwanted stops.

The modular design of the PCS and batteries simplifies service: if necessary, a specific module can be quickly replaced without long downtime of the entire system.

Saving and earning: working modes

1. Savings mode for business

• smoothing consumption peaks and reducing the maximum capacity fee;

• using night tariffs and own generation of solar power plants instead of purchasing expensive “daytime” electricity;

• increasing the share of self-consumption at facilities with large solar stations.

2. Commercial mode – energy sales

Due to the capacity of 261 kWh and the possibility of parallel connection of up to 10 cabinets (up to 2.61 MWh and 1.25 MW of power), the complex is suitable for:

• participation in the ancillary services market, frequency regulation and reserves;

• short-term arbitrage – charging during low-price hours, discharging and selling during peak hours;

• supporting commercial solar power plants in PPA or "net-billing" models, when it is important to flexibly feed energy into the grid.

Where is it advisable to install Solplanet ASW 125K/261-PT?

• industrial enterprises with large installed capacity;

• logistics and cold storage facilities, agricultural complexes, elevators;

• shopping centers, business centers, hotels, medical institutions;

• commercial solar power plants and energy cooperatives.

Solplanet ASW 125K/261-PT is a turnkey C&I-storage solution that combines high energy efficiency, deep security, and intelligent management. It allows businesses to simultaneously reduce energy costs, increase power reliability, and open up new revenue streams through the sale of stored energy.