PHOTO: There’s 20kw of solar panelling attached to the roof.Source: Supplied

A vendor’s commitment to efficient energy use will come in handy for the buyer of a Donvale mansion with two Tesla batteries and a 20kw solar energy system, which he claims is actually making him money.

Towering mansions don’t have a reputation for cheap power bills, but a Donvale dream home has turned that assumption on its head.

Boasting two Tesla batteries, 20kw of solar and a system that feeds the surplus back into the grid, 5 Pambara Court doesn’t pay a cent on the dreaded quarterly energy bills.

In fact, vendors Ingo Reisch and Shauna Kerrigan are actually making money by redistributing their excess power.

The Donvale home, with a price guide of $3.7-$4 million, also features huge double glazed windows in a breathtaking modern living zone, double height insulation and hydronic floor heating run via solar power.