These are the figures estimated for this installation, not metered results. What a household actually saves depends on its electricity tariff and how much of the day it is using power.
30 × 440W panels — 20 on the south-facing garage roof plus a second elevation — with two 9.5kWh GivEnergy batteries in parallel to stay off-grid for longer.
Our client wanted to bring their energy bills back down after installing an electric heat pump — a change that shifts the heating load onto the electricity meter and makes on-site generation considerably more valuable.
We installed 20 × 440W solar panels on the south-facing garage roof, with the remainder of the array on a separate elevation to maximise production across the day rather than concentrate it all into a single midday peak.
For storage we opted for two 9.5kWh GivEnergy batteries working in parallel, doubling the maximum power available and allowing the property to stay off grid for longer — which matters most on the winter evenings when the heat pump is working hardest.
The installation generates around 11,857 kWh a year and saves around £3,020, with a lifetime saving of around £75,600.
Hardware: 30 × Jinko Tiger 440W panels, 2 × 9.5 kWh GivEnergy batteries