China’s Marstek offers four home battery products in Europe

Chinese home solar and storage manufacturer Marstek Energy Co. Ltd. has unveiled a range of applications for its artificial intelligence-optimized lithium iron phosphate (LFP) batteries, which it says have a 10-year warranty, 15-year life, and operating temperature of between -25 C and 60 C.

Marstek claims its Venus D balcony energy storage battery is “compatible with any existing solar system” and its “plug-and-play” nature ensures it can be fitted in five minutes.

The Venus D can accommodate 4 kW of solar panel input via four maximum power point trackers (MPPTs) and offers 2.2 kW of alternating-current (AC)-coupled on-grid power.

The modular 2.56 kWh battery packs can be combined to have a 15.36 kWh storage capacity by stacking six units.

Marstek says the IP65 waterproof and dustproof product can perform 6,000-plus cycles. A company spokesperson told ESS News that the Venus D will be coming to market in Q3 and the estimated price will be 1,299 Euro.

The company’s Venus X dual-mode, AC-coupled, home solar-enabled energy storage system can take 3 kW of grid input and offer 800 W of grid output, depending on local regulations, in its “Plug-and-Play” mode. In “Professional” mode, the Venus X offers 6 kW of grid output and 7.5 kW of grid input and can handle 12 kW of AC solar electricity from a home array.

The system offers 3.6 kW of backup power for essential loads or 6 kW of backup power, and 12 kW peak, in its whole-home backup power setting.

The 5.12 kWh, modular battery packs can be stacked up to six units for 30.72 kWh of capacity.

Marstek is also advertising its 1 kV Mars I Plus and Mars II residential solar- and heat pump-enabled batteries.

The Mars I Plus comes as either a 6 kW, single-phase inverter, offering 12 kW of solar array input via two MPPTs and 24 kW of electric vehicle (EV) charging power; or a 12 kW, three-phase inverter for 24 kW of solar input, via four MPPTs, and with 40 kW of EV charging.

The modular, 5.12 kWh battery packs can be stacked up 30.72 kWh in six packs and further scaled, in parallel, to offer 24 kW to 96 kW maximum power point tracking and 8 kW/10.24 kWh to 48 kW/122.88 kWh capacity.

The Mars II product has a three-phase, 15 kW hybrid inverter which can handle 24 kW of solar input and maximum power point tracking, and 40 kW of EV direct-current charging. The example used by Marstek in its publicity claimed users could save €2.76 ($3.13) per day.

The manufacturer says the modular, 7.68 kWh battery packs can be stacked up to 46.08 kWh, in six units, and scaled in parallel to offer 24 kW to 96 kW maximum power point tracking and 8 kW/15.36 kWh to 60 kW/184.32 kWh capacity.

Use of an open API programming interface means the Mars II can use a third-party energy management system, according to Marstek.