In 2026, the combination of solar panels, battery storage, and an EV charger has emerged as the definitive home energy upgrade for South West homeowners. The three technologies work together in a way that multiplies the financial benefit of each — and installing them together in a single project reduces cost, disruption, and complexity compared to retrofitting components one at a time.
How the Three Systems Work Together
Understanding how solar, battery, and EV charging interact is key to appreciating why the bundle approach is so effective. Here is a typical day in the life of a South West home with all three systems installed:
Morning (6am–9am): The household wakes up and draws power from the battery, which charged overnight during off-peak grid electricity hours (typically 5–7p/kWh on a smart tariff). The EV may be finishing its overnight charge, also timed to use cheap off-peak electricity if solar wasn't sufficient the previous day.
Daytime (9am–5pm): Solar panels generate electricity. The system prioritises self-consumption: the house runs on solar, the battery tops up, and if the car is plugged in, it charges on free solar electricity via the Zappi charger's eco+ mode. Any surplus after all of this is exported to the grid at the Smart Export Guarantee rate.
Evening (5pm–11pm): Solar generation drops. The battery discharges to power the home through the evening peak, avoiding expensive peak-rate grid electricity. The Zappi charger continues to draw from the battery if a charge session is set up, or waits for overnight off-peak grid electricity.
The result is a household that draws very little electricity from the grid, and when it does, draws it at the cheapest possible time. In the South West's high-irradiance environment, a well-designed 4.5kWp solar + 5.12kWh battery system combined with a Zappi charger and a smart energy tariff can reduce a typical household's net electricity bill to near zero for 6–8 months of the year.
Bundle Cost Breakdown
- 4.5kWp solar panel system (12 × Jinko Solar panels, Growatt inverter): £7,613 with 0% VAT
- GivEnergy 5.12kWh battery storage: £3,000
- Zappi 7.4kW EV charger (myenergi): £749 including installation
- Total bundle (4.5kWp + battery + EV): approximately £11,362
Annual Savings Breakdown
Annual savings vary depending on energy usage, EV mileage, and electricity tariff, but typical South West estimates for a family home:
- Solar electricity bill savings: £700–£1,000/year
- Battery storage additional savings (evening self-use): £300–£500/year
- EV charging savings vs petrol (10,000 miles/year at 4 miles/kWh): £900–£1,400/year
- Smart Export Guarantee income: £100–£200/year
- Total estimated annual saving: £2,000–£3,100/year
Why Install Together Rather Than Separately?
Installing all three systems in a single project rather than sequentially saves money in several ways. You only need one scaffolding erection. Cabling between the systems is planned from the outset, avoiding the need to retrofit conduit runs. The inverter and battery are sized to accommodate EV charging loads from the beginning. And you receive a single MCS certificate covering your entire system, which is cleaner for insurance purposes and Smart Export Guarantee registration.
D&R Energy specialises in combined solar + battery + EV charger installations across the South West. Visit our Solar + Battery + EV Bundle page for full package details, or contact us to arrange a free survey and quote.
