House batteries can mitigate the potential risk of electric power cuts and like ASHPs have become much more popular.[sixteen] Some ASHPs can be coupled to photo voltaic panels as Principal Power source, with a standard electric powered grid as backup source.[citation essential] One or more[9] indoor condenser heat exchanger coils. https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/