Firstly the workmanship of all your installers was excellent. I would like to thank all of them. How ever I am disappointed in the type of inverter fitted that cannot have a battery for storage of excess energy. Surely the point of fitting solar panels under the grant scheme is to upgrade the EPC as much as possible. A better inverter with a battery storage facility would have served that purpose better and also one on which the flow of energy can be tracked on a phone app. So summary delighted with your installers but disappointed in the kit that was used. Please inform me if a battery can be installed with this inverter and does it feed energy back into the grid. Thank you Peter Finnigan.