Ronski's Solar & battery DIY build with whole house backup
- Thread starter Ron-ski
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I expect so, we'll see next winter.
November through to February we used £368 of gas and around £36 worth of SC, that buys a lot of 7p electric, even if we run out of battery I think we'll still be better off.
November through to February we used £368 of gas and around £36 worth of SC, that buys a lot of 7p electric, even if we run out of battery I think we'll still be better off.
The way I looked at it was that our gas bill for last year alone was £583. At the very worst, we could use 2328kWh of peak rate electricity over the year and it'd be break even. Bearing in mind the water heating and legionella cycle would be overnight at the cheap rate (6p/kWh) and we usually have at least 6kWh left in the battery each day to export and also export some solar too. It should be much less.
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I’m usually at least 40% off peak with my heat pump before we consider battery power. It only drops into the 30’s when it doesn’t get above ~3C all day. I can be up in the 50’s some days e.g. when it’s above 10C most of the day.
I’m running at 30C flow temp at 12C outside, it’s just on tick over at 350w at that temperature.
I’m running at 30C flow temp at 12C outside, it’s just on tick over at 350w at that temperature.
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