Household batteries can mitigate the potential risk of power cuts and like ASHPs have gotten much more popular.[16] Some ASHPs is usually coupled to photo voltaic panels as Principal Electricity source, with a standard electric grid as backup source.[citation necessary] You'll have House - outside the house for that pump https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/