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Topic starter
23/02/2026 1:19 pm
@sheriff-fatman, I don't mind Dale's criticism but I feel that he and his company are focussing on the wrong elements of heat pump failures which is why I recorded and published this last week:
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23/02/2026 1:43 pm
@editor I'd missed that, and it's a very good response to Vince's points raised.
I agree in particular that there's far more complexity than the simple 'SCoP of 4 needed', particularly as my installation contradicts this.
I'll probably be looking at a verifiable SCoP of a little over 3 on an annual basis on my installation on my sub £3k installation (after grants) but it's delivered energy cost savings of 40-50% so far compared to last year's equivalent gas heating costs. It's a largely tariff related saving via having access to Octopus Intelligent Go rates alongside solar and battery storage, so the scale of savings may change going forward, but I'm sure there will always be some form of time use tariff available where I'll be able to run it cheaper than gas.
130m2 4 bed detached house in West Yorkshire
10kW Mitsubishi Ecodan R290 Heat Pump - Installed June 2025
6.3kWp PV, 5kW Sunsynk Inverter, 3 x 5.3kWh Sunsynk Batteries
MyEnergi Zappi Charger for 1 EV (Ioniq5) and 1 PHEV (Outlander)
User of Havenwise (Full control Jun-Dec 2025, DHW only from early Dec)
Subscriber to MelPump App data via CN105 Dongle Kit
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