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If you don't mind spending money the SMA Sunny Islands will cope with all of that. You can set them up as a 3 phase system, parallel up to 3 of them in a simple system, more if you complicate the system somewhat. They can be setup in various modes - stand alone with generator backup, grid tied with...

If you don't mind spending money the SMA Sunny Islands will cope with all of that. You can set them up as a 3 phase system, parallel up to 3 of them in a simple system, more if you complicate the system somewhat. They can be setup in various modes - stand alone with generator backup, grid tied with ...

Anyway, heatpunk recons we have a heat loss 6916w at -3.2c, so a 7kW Aerotherm Plus should be sufficient. It also says our total annual demand is 16967 kWh a year, which seems at odds with our actual gas usage. Our annual gas usage for 2023 was 9099 kWh, that was for heating, hot water and our gas ...

I thought the consensus was that air source us great untill you hit negative temperatures and then it's pretty rubbish? Yes, ASHP performance deteriorates at low air temperatures. However, as a general rule you don't get low temps for all that much of the heating season. For instance, it's freezing...

While it was a pretty rubbish article, it's more than a little unreasonable to accuse people of being dim. Energy saving is a wide ranging subject with multiple areas, all of which involve varying degrees of technicality combined with political and bureaucratic complexities. Add in various actors wi...

On the opposite side so to speak our 40kWh battery stack won't be exporting much to the grid in Wintertime as its going to be needed to run the ASHP. If it does modulate down to 25% of its capacity that's 1.75kW of power demand of which I can expect 500W from the PV even in Winter generation condit...

Reading this today sent me back to the heat pump monitoring pages to have another look and its surprising to see how flexible some of the set points are. As an example we were advised that running a heat pump low and slow is the best way to get the optimum performance, but on the monitor pages you ...

That video was using 22mm distribution pipes under the floor boards - thats not small bore. The radiators were fed with micro bore pipes. It's a common arrangement. Obviously if the system has a manifold and 10s of metres of microbore feeding each radiator then it isn't going to work well, but it p...

I have a few issues with HPs. I would fit 1or 2 A2A HP but my wife will have non of it, citing the draught and looks of the indoor unit I would fit a A2W system but my house is small bore I dont agree with the MCS that the whole house should be heated to 21C ? on the coldest day of the yr. This mak...

I doubt that many people confuse cost with CO2 emissions, but for all but the very wealthy and/or committed you can't avoid the cost issue. Very few people are going to pay the £3000-£5000 you can expect to pay for an MCS installation just to replace a gas boiler with similar or higher running costs...