British family turns 1980s home into a mini power station to ensure five years of no energy bills

A family in Milton Keynes has turned their 1980s home into a self-generating energy system using solar panels, a heat pump and battery storage, allowing them to join a five-year tariff designed to eliminate energy bills.

Milton Keynes wanted to reduce their electricity bill. Eventually they built a small power plant

Winter meant a familiar routine for Clare Naylor and her family: check the electricity meter, put on another sweater and try not to turn up the heat too much.

A family’s four-bedroom detached house in Milton Keynes was not particularly unusual. Built in the 1980s, it relied on a gas boiler and mains electricity, with the household spending about £130 a month on energy.

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Now the same property produces, stores and uses much of its own energy.

The house is equipped with 17 solar panels, a heat pump, a large battery and four new radiators. The gas boiler has been removed and the family no longer uses gas, including cooking. Together, these changes turned the property into a small power plant.

The upgrade also allowed Naylors to join the Octopus Energy Zero Bills plan, which guarantees five years of no energy bills as long as the household stays within an agreed fair usage limit.

The system works by generating electricity through solar panels and storing excess energy in a battery. The heat pump then uses electricity instead of gas to heat the house. If a property produces more electricity than it needs, the excess can be exported to the grid.

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what are the conditions

The Zero Bills Guarantee does not apply to EV charging and households are expected to stay within the energy consumption level calculated for their property.

But for Naylors, the difference is already changing everyday life.

Before the renovation, Naylor told The Guardian that the family generally kept the thermostat at around 18C. During the colder periods, hot water bottles, slippers and sweaters helped keep everyone comfortable without adding to the bill.

Now he can think differently about heating the house. Instead of waiting for everyone to get home, she’s going to warm up before her kids get home from school.

The reconstruction itself would be expensive. The solar panels, heat pump and batteries were estimated to cost just under £20,000 after the government subsidy. The family didn’t pay this upfront because Santander funded the work as part of a project looking at how existing homes could be made more energy efficient.

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This initial cost is one of the biggest barriers to wider adoption. Santander explores financing options for home upgrades; a £20,000 home improvement loan at 6.4% over five years would work out to roughly £389 a month in repayments, according to The Guardian.

Octopus has previously used Zero Bills in hundreds of new build properties. The company is now testing whether the model can work in older homes, where insulation and heating systems often need significant upgrades.

For the Naylors, the experiment produced a very tangible result. A family heads into winter with a home that can generate and store its own electricity, while the money spent on meter monitoring can be put towards other things.

Naylor has one more challenge: getting her kids to remember to close the door.