How do we calculate this 90% savings?
This 90% savings figure is calculated by comparing what the average household would pay per year for electricity on the Energy Price Cap (£880.87) from 01 April 24 - to what they would pay with a 4kWp solar system with battery.
Assuming a household uses 30% of their generation (£294.00) and exports 70% on a £0.15 rate through the Smart Export Guarantee (£420.00) yearly savings could equal £714.00, an up to 80% savings.
Adding a battery can increase self generation consumption to 80% of usage meaning a household could save £529.00 + £276.00 (SEG export) = £805.00, up to 90% of their annual electricity bill.