Anker's 7 kWh Plug-In Battery Brings Solar Storage to DIYers

Homeowners with rooftop solar just got a simpler path to energy independence.

Chinese battery maker Anker Solix launched the Solarbank Max AC, a 7 kWh home battery system designed to work with existing solar installations without requiring a complete inverter replacement. The plug-in design means many homeowners can install it themselves under local regulations, dramatically reducing the barrier to entry for home energy storage.

The system starts at 7 kWh but expands up to 42 kWh by adding extra battery modules. Each base unit includes a 3.5 kW inverter that handles both charging and discharging, and during a power outage, it switches to backup mode in under 10 milliseconds.

Anker designed the system specifically for the retrofit market. Millions of homes already have rooftop solar but lack battery storage, often because adding batteries traditionally requires expensive professional installation and equipment upgrades. The Solarbank Max AC changes that equation by working alongside existing systems.

The specs back up the practicality. The unit operates in temperatures from negative 20 to 55 degrees Celsius, carries an IP66 weather rating, and handles the power surges from appliances like refrigerators and water pumps. It's rated for 10,000 charge cycles, roughly 15 years of daily use, and comes with a 10-year warranty.

Germany leads the way on simplified regulations, increasingly allowing plug-in operation with grid charging and self-installation for systems up to 800 VA. Other European countries are updating their rules as well, though professional installation remains required in many places for full functionality.

The pricing reflects Anker's consumer electronics roots. The base 7 kWh unit costs €2,229 in Germany, with expansion batteries at €1,799 each. A fully loaded 42 kWh system runs around €11,224, significantly less than many traditional home battery installations that require professional setup and new inverters.

An integrated app manages the system and includes Anker Intelligence software that optimizes charging and discharging based on dynamic electricity rates. The company even added a voice assistant called Anka to help users manage their energy.

The Ripple Effect

This launch represents more than just another battery product. By making energy storage accessible to DIY installers and existing solar owners, Anker is opening the door for millions of households to maximize their clean energy investment. When more homes can store solar power for nighttime use, entire neighborhoods reduce their evening demand on the grid.

The timing aligns with a broader shift in Europe toward simplified plug-in solar regulations. Germany's recent rule changes allowing larger systems without electricians create the perfect environment for products like the Solarbank Max AC to thrive. As more countries follow suit, the retrofitted solar-plus-storage home could become the norm rather than the exception.

Pre-orders open April 9, 2026, with promotional campaigns including free smart meters starting May 26.

Energy storage is finally becoming as simple as the solar panels already on the roof.