Solar & Powerwall – Street
The Project.
An existing customer of ours recently purchased a new home and owing to their existing relationship with us selected us for the installation of a solar PV system with battery storage.
The house benefits from a large roof with plenty of space to install a large solar array, with external space for a battery and inverter close to the incoming electrical supply.
The Solution.
Our design included an 8.4kW array split across the 2 aspect of the roof, facing south west and north east to maximise production. These would be connected to a string inverter with the house being fitted with a Tesla Gateway and Tesla Powerwall 2 battery which would back the house up in the event of a power cut.
The Installation.
Completed over the course of 4 days the inverter, gateway and battery were successfully installed in the alley to the side of the house, connected to the main electrical supply to the house and a new protective earth rod installed.
The array on the roof was installed using a Schletter on roof mounting system, tested to MCS standards and connected to the inverter before production and earth leakage were tested.
The Results.
With an overall cost of approximately £14,000 the system is expected to save the customer around £1,500 in electricity by producing roughly 6,734kWh a year and maximising the production by storing excess energy in the Pwerwall before exporting to the grid.
Any generating power once the Powerwall is fully charged can be exported to the grid and with fixed export tariff offering 15p per kWh plus this is a good way of maximising savings and resulting in a payback period of around the 6 to 7 year mark.