Residence batteries can mitigate the potential risk of electricity cuts and like ASHPs have become much more common.[sixteen] Some ASHPs might be coupled to photo voltaic panels as Key Electricity source, with a traditional electric powered grid as backup source.[citation needed] Heat Electricity from the outside air has long been https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/