Tennet and solar battery maker Sonnen GmbH have come together to launch a pilot project that will tap home solar photovoltaic (PV) systems with the aim of ironing out imbalances on Germany’s power network.

The duo aim to sign up 6,000 household PV producers equipped with storage batteries by the end of May.
TenneT

At the moment Germany’s grid is insufficiently developed to contain all of the renewable energy being produced. Both parties see the project as an opportunity to harness the power of home solar PV and cut wastage.

The project will be supported by blockchain technology from IBM, which works as an inexpensive transaction-processing system for tracking and recording encrypted information.

It holds potential to link up small energy “prosumers” and make them independent of centralized power providers.

The two partners aim to initially pool 24 MW of power capacity for TenneT to use as a buffer for variable wind power.

“We want to find out how we can reduce the waste of wind power by storing it in Sonnen batteries that we can access in the North while releasing power from solar energy stored at Sonnen batteries in southern Germany,” said Urban Keussen, board chairman of the board at TenneT’s German unit.

Germany has 15 million detached houses and 1.7 million photovoltaic units, but only 50,000 home storage units.

Should 10 percent of all households use solar plus storage in 10 years, that would create capacity of some 6 GW of power, equivalent to six nuclear plants.