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Welch house returns $275 (£ 175) for every $150 (£ 100) consumed.
Using solar panels that are the roof, and ones in the garden, combined with extra insulation, it is able to give back to the grid power that the occupants will not use.
The new conservative government in Wales has recently rescinded the laws that made new housing more insulated, but this house was build to the strict specs that were once in place.
In my opinion when you are sweating in the middle of winter with no external sources of heat, then you can talk about making things less insulated.
You can not be over insulated, you can always crack a window.
The house uses batteries to store electricity for use at night.
Like the TESLA POWERWALL does.
HOUSE IN WALES. MAKES $275 for every $150 consumed
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