How solar panels, a home battery, and a smart EV charger work together — and why installing them as a system saves more money than each one alone.
Most people think of solar panels, home batteries, and EV chargers as separate products. But when they're installed together as a system, they work in a way that's far more powerful — and far more economical — than any one of them alone. Here's how it all fits together.
A standard solar installation generates electricity whenever the sun shines. The trouble is, peak generation happens between 10am and 3pm — when most people are at work. Without a battery, that electricity either gets used by appliances you've left on standby, or exported to the grid at a relatively low rate. You're generating energy you can't fully benefit from.
A home battery changes everything. Instead of exporting your surplus generation, you store it. By the time you get home in the evening, you have a full battery ready to power your home through the night. A 10kWh battery is enough to cover most households' evening and overnight consumption, meaning you can often go the entire night without drawing from the grid at all.
Electric vehicles have large batteries — typically 40 to 100kWh. A smart EV charger connected to your solar and home battery system can be programmed to charge your car only when your panels are generating surplus electricity. On a sunny day, you could arrive home to find your car charged entirely from free solar energy.
A typical home with a 4kWp solar array, 10kWh battery, and smart EV charger can reduce its annual electricity bill by 60 to 80 percent. Factor in the Smart Export Guarantee payments and the savings on fuel costs for the EV, and the combined system typically pays back in 6 to 9 years — all while reducing your carbon footprint significantly.
At Zeno Electrics, we handle the entire system as a single project. One survey, one quote, one installation team. The solar panels, inverter, battery, and EV charger are all specified to work together from day one, rather than being retrofitted piece by piece by different contractors.
Interested in a complete system? Get in touch for a free site survey and fixed-price quote. We serve homeowners and businesses across Hertfordshire and Greater London.