New solar panels: what certification and documentation should I receive?

thesheep Posts: 2
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We've just had solar panels and a battery installed. The installer is going to send us the MCS certificate. From the government website it looks like I should maybe also be getting a CPS (competent person scheme) certificate from the building standards point of view, but the installer has not mentioned this. Should I be expecting both or is the MCS enough? Seems a bit confusing?
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