Dwelling batteries can mitigate the risk of energy cuts and like ASHPs have become a lot more well-known.[sixteen] Some ASHPs could be coupled to solar panels as primary energy source, with a standard electric grid as backup source.[citation needed] An air-to air system can be designed to transfer heat in https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/