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Their concept is mad!
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they're going to bankrupt themselves if they think they can run plug in heaters off solar.
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Bonkers ‘idea’. Ruinously expensive to heat a large house using any kind of direct electric heating.
Get a heat pump off Octopus/British Gas with the £7.5K grant, run it via the Tomato Energy tariff that gives 6 hours of 5p/kWh leccy per day.
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The EPC usually gives guidance on what to improve, if they have a recent one of those. They should if they’ve just bought the house.
Solar in effect is a completely separate piece to the energy puzzle. When you need most heating there’s likely to be least solar and vice versa.
The Octopus prices seem very good and upgrading radiators is included in it. But insulation is key to it being efficient (from my understanding).
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Retrofit coordinator if they want an informed opinion and someone to help plan works. They do vary a bit in expertise so try and get recommendations or speak to them first.
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@Belagerent
My family has moved into a big house and realised they can't really afford to heat it as it stands. They have some cash to spend in improvements, but mostly seem interested in getting solar and cache batteries, whilst heating the house with plug in electric heaters. Intuitively I feel like they should look to improving insulation and using the gas central heating. I've no numbers to back any of this up. It just feels like the better idea in the long run (they don't think they'll live here for longer than 20 years)
Does anyone recommend a service where people come round and look at all your stuff and assess what would be best to do? They won't listen to me but they may listen to someone like that. They're in Leicester rather than London (or they wouldn't have bought a big house) but I would appreciate knowing ball park how much such a service would cost.
They gave an EPC but don't seem that interested in it.