An EPC is now required in order to receive the full feed in tariff (FIT) from your solar PV installation. For the full FIT your EPC must achieve a rating of D or better, this rating can take into account the solar PV installation and the improvement it gives your rating.
If you have a quote for solar PV we can produce a predictive EPC using the information from the quote to indicate the rating you will achieve before you decide on placing an order for solar PV.