We completed this project in Erskine in June 23 a year after installing a MyEnergi Zappi EV charger. Many of our clients have progressed onto Renewables having first experienced the benefits and cost savings of an electric vehicle.

On roof solar panels must have a 400mm clearance from the roof edges to mitigate effects of driving wind. On the design images below the yellow outline indicates the 400mm space we are allowed to install panels within, this information is sent to clients as part of the quotation and dictates how many we can install. Using specialist software we input measurements taken during the design visit including roof pitch, direction and obstructions like chimneys and shadowing to accurately estimate solar generation from the proposed system.

An issue using products from different companies is setting them up to work along side each other without them being able to communicate. In this home when the GivEnergy inverter is producing energy and the home isn’t using it and there is a surplus, the GivEnergy battery, MyEnergi Eddi & Zappi would fight over which one of the 3 gets the surplus energy first.

As they cannot communicate, we set an export margin on the MyEnergi equipment to ensures the battery charges first. This means when the GivEnergy inverter has charged the battery and 100W is being sent back to the grid the MyEnergi products activate to send the surplus either to the car or hot water cylinder. Nice! Within the MyEnergi app priorities can be set for car and hot water cylinder with a nice option of splitting surplus 50% to each.

Consumption at this home was estimated at 6900kWh per year and the 16 panels are estimate to generate 4126kWh per year. Consumption included the impact of the Electric Vehicle charger that can be discounted from annual consumption figure as it is being charged from Octopus Intelligent Go at 7.5p per kWh over night. If Electric Vehicles are charged overnight using cheap tariffs it leaves the solar system and battery to cover electricity demand in the house.

When we are looking protecting an installation against over voltage, we have to give some consideration to external cables entering the building. PV installations will come in to this bracket. SPD’s for PV systems are to protect the inverter and the fixed installation, therefore PV SPD’s should be installed on the DC side of the PV system, before the inverter. These will always be Type 2 devices, unless the building has an external lightning protection system and the correct separation distance to BSEN 62305-3 has not been maintained, where you would install a Type 1 SPD.