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	RE: Sanity check please. Battery storage and inverter sizing. By AdamK, 3 weeks ago Forum Energy Storage
	@old_scientist one installer who wanted to use sigenergi and 2 8kwh batteries was also going to fit 1.875kwp of solar on the garage roof where the battery will live, but I’m not sure at that low amoun...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By Old_Scientist, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	I estimated our usage on the following basis. The most challenging 6h window for us is 4-10pm as it coincides with cooking/meal time (electric oven, air fryer, microwave, kettle all potentially in use...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By Toodles, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@webcmg That crystal ball I mentioned…, well hindsight is wonderful, but who has foresight? I had solar and battery installed in August 2022 - look what has happened to energy prices since then! Rathe...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By Old_Scientist, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	Agreed that Cosy works best for battery owners, and the savings do not always stack up well versus the battery costs over the 10 year warranty period (although hopefully the battery will have a longer...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By Richard24738, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@webcmg Yes, the Ovo tariff certainly looks attractive. Unfortunately, Ovo are not accepting Mitsubishi Ecodans at this time. I am on their waiting list. As mentioned, the cosy tariff really needs a ...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By webcmg, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	I do need to track what the peak usage is outside of Cosy slots in order to determine what the smallest battery I could get away with is... that would reduce the investment cost and minimise the break...
	RE: Sanity check please. Battery storage and inverter sizing. By Old_Scientist, 3 weeks ago Forum Energy Storage
	OK, so if it were a Tesla Powerwall I'd be presenting arguments to the DNO for the full 11.04kWh inverter rating for the battery, keeping the solar on the existing inverter and AC coupled, with no add...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By Richard24738, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@old_scientist Thanks for the reply. Both myself and my wife are retired and do not like to be cold so having a set back temperature during the expensive 4pm to 7pm period is not attractive, although ...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By webcmg, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@toodles I'm not 100% sure about that, I was considering a Fogstar 32kwh battery + inverter. I think this coupled with Cosy would likely reduce all our electricity use to 12.29p, but the ASHP saving o...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By webcmg, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@richard24738 as we do not have batteries or solar, I'm sticking with OVO extended fixed 13 month plan to Nove 2026 with their free Heat Pump Plus add-on (type of use tariff). The fixed tariff is 23.8...
	RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff By Toodles, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	@old_scientist Although Cosy is (presumably) aimed at heat pump owners, I think the tariff really offers the most efficient utilisation to those who have the means (battery) to suck up their day long ...
	RE: Rodents! A word of warning for heat pump owners By Tim441, 3 weeks ago Forum Air Source Heat Pumps (ASHPs)
	ChatGPT comments: Yes – unfortunately, vermin can sometimes get inside an air source heat pump (ASHP). The unit is outdoors, draws in air, and has plenty of warm sheltered spaces that ca...