Dutch manufacturer Atmoce launches retrofit-ready home battery

Amsterdam-based household renewables company Atmoce is offering owners of older residential photovoltaic systems a new way to retrofit a battery.

The M-ELV battery, which eliminates the need to replace existing inverters, is particularly aimed at systems built around 10 years ago, when home energy storage was scarce. The system is designed to have universal inverter compatibility.

Atmoce’s product is a low-voltage lithium iron phosphate (LFP) battery that connects directly to a household alternating-current (AC) circuit. No complex rewiring or additional, hybrid inverter are required. The package includes a gateway that mounts on a standard metal DIN rail. Atmoce said the M-ELV offers separate measurement circuits for electrical load, photovoltaic generation, and energy storage, allowing for precise measurement and control of energy flows.

The M-ELV features particularly low battery voltage of less than 30 V. Atmoce said that makes the system particularly suitable for retrofitting older systems. Despite its direct connection to the household AC circuit, the battery is galvanically isolated from the grid. Its storage capacity is 7 kWh per unit. A maximum of 3.75 kVa can pass through the input and up to 5 kVa are possible when storing electricity. The system can be used in single- and three-phase configuration and can theoretically be expanded up to 126 kWh.

Atmoce reports a charging and discharging efficiency of 90%. The system measures 83 cm by 48 cm by 19.5 cm, weighs 73.5 kg, and is IP66 dust and water resistant. Its operating temperature range is between -20 C and 55 C.

The M-ELV system is controlled via the Atmozen app, which enables users to monitor their energy flows. The app supports self-consumption optimization and provides an overview of electricity generation, consumption, and storage. Atmoce offers a 15-year warranty on the energy storage system.

From pv magazine Deutschland.