Solar Panels, Battery & EV Charger: Package Cost & How They Work Together (2026)
Solar panels, a home battery and an EV charger are three separate products, but fitted together they act as one system. Your roof makes the power, the battery stores it, and the charger puts cheap electricity into your car. This guide covers what the full package costs, how much extra solar an EV needs, whether to charge the car from solar or on an overnight tariff, which should charge first (the battery or the car), the grid and VAT rules, and why one coordinated install beats three separate ones.
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What the full package costs
Typical 2026 installed prices. Solar and battery prices include 0% VAT, and the charger includes 20% VAT:
| Package | Solar + battery | 7kW EV charger | Total installed | Suits |
|---|---|---|---|---|
| 4kW + 5kWh + charger | £9,000–£11,500 | £800–£1,200 | £9,800–£12,700 | 3-bed home, one EV, average mileage |
| 6kW + 10kWh + charger | £12,000–£14,500 | £800–£1,200 | £12,800–£15,700 | 4-bed home, one or two EVs |
| 8kW + 10kWh + charger | £14,400–£17,000 | £800–£1,200 | £15,200–£18,200 | Large home, two EVs or a heat pump |
The charger price assumes a standard install near your consumer unit. A long cable run, a new consumer unit or a main fuse upgrade adds to it (EV charger installation cost). For solar and battery pricing on their own, see battery packages, 4kW solar with battery and solar panel cost UK.
How solar, battery and EV charger work together
- Daytime: the panels power the house first. Spare power then goes to the battery, the car or the grid, in whatever order you set.
- Evening: the battery runs the house through the expensive peak hours.
- Overnight: on an EV tariff, the car and the battery top up from the grid at the cheap rate.
- The brains: a hybrid inverter manages the panels and battery, and a smart charger manages the car. Small sensors on your incoming supply, called CT clamps, tell each device what the house is doing, so they don’t work against each other.
How much electricity an EV adds
A typical EV driven 7,000–8,000 miles a year uses roughly 2,000–2,500kWh. That nearly doubles the electricity use of an average home (about 2,500kWh). To generate that much, you’d need about five or six extra 440W panels, or 2–2.5kW. You don’t have to match it exactly. If the roof has room, bigger is better with an EV, because the extra power is either used in the car or exported for payment. See how many solar panels do I need and what size battery.
Solar or overnight tariff: the cheapest way to charge
This is the question that decides how you set the system up. The cost of putting 2,000–2,500kWh a year into the car:
| How you charge | Cost per kWh | Cost per year | Per mile* |
|---|---|---|---|
| Standard tariff, any time | 26.32p | £530–£660 | ~7.5p |
| Surplus solar (you give up the export payment) | 12–15p forgone | £240–£375 | ~3.4–4.3p |
| Overnight EV tariff | ~7.6p | £150–£190 | ~2.2p |
*At 3.5 miles per kWh. The standard rate is the October–December 2026 price cap, and the overnight rate is Intelligent Octopus Go’s off-peak price, which runs from 11:30pm to 5:30am.
Solar power isn’t quite “free” for the car, because every unit you put into it is a unit you could have sold for 12–15p. So:
- If you can get an EV tariff, charge the car (and top up the battery) overnight at about 7.6p, and let your spare solar export at 12–15p. You earn more than you spend.
- If you’re on a standard tariff, or your export rate is low, send surplus solar to the car with a solar-diverting charger. It’s far cheaper than 26p from the grid.
- If the car is home in the day, a mix works well: solar when it’s sunny, cheap overnight power when it isn’t.
See Intelligent Octopus Go, off-peak battery charging and SEG export tariffs compared.
Not sure what size system your EV needs?
A vetted installer will size the panels and battery around your mileage, your tariff and your roof, and price the charger in the same quote. It’s free, with no obligation.
Get My Package Price →Choosing the EV charger
- 7kW is the standard for a home on a single-phase supply. It adds about 25–30 miles of range an hour, enough to refill most cars overnight (7kW vs 22kW).
- Solar-diverting chargers, such as the myenergi Zappi and Hypervolt, can charge the car only from surplus solar, or top up surplus with grid power. A car needs at least about 1.4kW to charge, so on a dull day a solar-only mode will pause.
- Tariff-compatible chargers matter if you want a smart EV tariff, because the supplier needs to control either the car or the charger (Octopus-compatible chargers).
- Tesla owners with a Powerwall can use Tesla’s own solar charging feature.
Our full rankings are in best home EV charger. If you’re thinking about a solar carport, see solar carports.
Battery or car first? Getting the settings right
Two devices both want your spare solar, so they need an order of priority. The common mistakes are:
- The home battery draining into the car. If the charger sees the battery’s output as “surplus”, it empties a 10kWh home battery into a 60kWh car in a couple of hours, and you buy peak electricity for the house that evening. A good installer positions the sensors and sets the modes so this can’t happen.
- The charger and battery fighting over surplus, switching on and off. Set one as the priority. Battery first usually makes sense, because it protects your evening use.
- Charging the car at peak rate because nobody set a schedule.
This is the main reason to have one installer design and commission all three. Ask them to show you the settings before they leave.
Grid rules, fuses and VAT
- Grid approval: solar and battery systems with an inverter over 3.68kW need a G99 application before installation. EV chargers must also be notified to your network operator. Your installer does both.
- Main fuse: a 7kW charger draws 32 amps. Added to a battery charging and normal house loads, that can be too much for an older 60-amp main fuse. Chargers have load management to prevent this, and your network operator can upgrade the fuse, often to 80 or 100 amps.
- VAT: installed solar panels and home batteries are 0% VAT until 31 March 2027. EV chargers are normally charged at 20%, so your quote should show the charger separately.
- Electricity VAT: household electricity in Great Britain also carries 0% VAT from 1 October 2026 to 31 March 2027, which makes home charging slightly cheaper this winter.
Why fit all three together?
- One design. The inverter, battery and charger are chosen to talk to each other, with sensors in the right places.
- One set of paperwork. The installer handles the grid applications for all three together.
- One round of electrical work. Consumer unit changes, cabling and testing happen once, which typically saves a few hundred pounds over three separate visits.
- One point of contact if something doesn’t work.
If you can’t afford everything at once, start with the panels and a hybrid inverter, which is battery-ready, then add the battery and charger later (adding a battery later). Vehicle-to-home charging, where the car acts as the house battery, is starting to arrive in the UK, but it needs a compatible car and charger.
Already have an EV or a charger?
A vetted installer can add solar and a battery around the charger you’ve got and set the three up to work together. It’s free, with no obligation.
Get My Free Solar Quote →The bottom line on solar panels, a battery and an EV charger
Solar, a battery and an EV charger are worth more together than apart. A typical package costs £9,800–£12,700 for 4kW, 5kWh and a 7kW charger, or £12,800–£15,700 for 6kW and 10kWh. With an EV tariff, charge the car and battery overnight at about 7.6p and export your spare solar. Without one, use a solar-diverting charger. Either way, running the car costs a fraction of standard-rate electricity. Have one installer design and set up all three, so the battery doesn’t drain into the car and the grid paperwork is handled in one go. Remember that the charger carries 20% VAT even though the panels and battery don’t.
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Solar panels, battery and EV charger: frequently asked questions
How much do solar panels, a battery and an EV charger cost together?
A typical package of 4kW of solar panels, a 5kWh battery and a 7kW EV charger costs about £9,800–£12,700 installed in 2026. A 6kW system with a 10kWh battery and charger is about £12,800–£15,700. Panels and batteries are 0% VAT until 31 March 2027, while the charger, typically £800–£1,200 installed, is normally charged at 20% VAT.
Can I charge my electric car from solar panels?
Yes. A solar-diverting charger, such as the myenergi Zappi or Hypervolt, can send your surplus solar power to the car. A car needs at least about 1.4kW to charge, so on dull days a solar-only mode will pause or top up from the grid. A typical EV uses 2,000–2,500kWh a year, roughly the output of five or six 440W panels.
Is it cheaper to charge an EV from solar or on an overnight tariff?
With a smart EV tariff, overnight charging is usually cheaper. Intelligent Octopus Go’s off-peak rate is about 7.6p/kWh, while every unit of solar you put in the car is a unit you could have exported for 12–15p. So it often pays to charge overnight and export your spare solar. On a standard tariff at 26.32p/kWh, charging from surplus solar is far cheaper than the grid.
Do I need a battery as well as solar panels to charge an EV?
No, but a battery helps the house rather than the car. Home batteries of 5–10kWh are small next to a 60kWh car battery, so they’re best used to run your home through the evening peak. The car charges directly from surplus solar in the day or from a cheap overnight tariff. The system should be set up so the home battery doesn’t drain into the car.
How many solar panels do I need to charge an electric car?
About five or six extra 440W panels, on top of what your home needs. A typical EV driven 7,000–8,000 miles a year uses roughly 2,000–2,500kWh, and each kW of panels generates about 950kWh a year in the UK. You don’t need to match it exactly, because an overnight EV tariff can cover the rest cheaply.
Should solar panels, a battery and an EV charger be installed at the same time?
If you can, yes. One installer can design the inverter, battery and charger to work together, handle the grid paperwork together and do the electrical work once, which typically saves a few hundred pounds and avoids settings problems such as the home battery draining into the car. If budget is tight, start with panels and a hybrid inverter and add the rest later.
Figures are typical 2026 UK estimates for guidance only. Prices vary by home, cable run, fuse and installer. Charging costs use the Ofgem price cap for 1 October to 31 December 2026 (26.32p/kWh), the Intelligent Octopus Go off-peak rate as published in October 2026, a 12–15p export rate and 3.5 miles per kWh. Tariffs change, so check current rates. 0% VAT on installed residential solar and batteries applies until 31 March 2027, and household electricity in Great Britain is zero-rated from 1 October 2026 to 31 March 2027. Always get a survey from an MCS-certified installer.