Last updated: March 13, 2026 | By Evolving Home
How Much You Can Actually Earn From Your Home as a Prosumer in the UK
The honest answer: it depends — but here are real numbers
The internet is full of breathless claims about "earning thousands" from your home energy system. Solar installers quote best-case scenarios. Battery companies show dream payback periods. Let's cut through the hype.
A typical UK home with solar panels and a battery can realistically earn £400–£900 per year in grid export income, while saving £500–£1,100 on energy bills. Total financial benefit: roughly £900–£2,000 per year. Payback on a full solar-plus-battery system: 8–14 years depending on your setup, usage, and tariff.
That's good. But it's not "free money" and it's not overnight. Let's break down exactly where the money comes from.
What "prosumer" actually means
A prosumer is a household that both produces and consumes energy. In practice, this means some combination of:
- Solar panels generating electricity from your roof
- A home battery storing excess generation for later use
- Smart controls that decide when to store, use, or export energy
- An EV charger that can charge cheaply and (eventually) feed back to the grid
The financial case for being a prosumer rests on three income streams. Let's look at each one honestly.
Stream 1: Self-consumption savings (the biggest one)
Every kWh of solar electricity you use directly in your home is a kWh you don't buy from the grid. At current electricity prices of around 24.5p/kWh (Q2 2026 price cap), that's the most valuable use of your solar generation.
Typical numbers for a 4kWp system (10–12 panels)
| Metric | Value |
|---|---|
| Annual generation | 3,400–3,800 kWh |
| Self-consumption without battery | 30–40% (1,000–1,500 kWh) |
| Self-consumption with battery | 60–80% (2,000–3,000 kWh) |
| Savings without battery | £245–£370/year |
| Savings with battery | £490–£735/year |
The battery roughly doubles your self-consumption because it captures midday surplus and feeds it back in the evening when you actually need it. That's where most of the financial value sits — not in export, but in avoided import.
Key variable: Your actual self-consumption depends on when you're home, how much you use, and whether you can shift loads (dishwasher, washing machine, EV charging) to sunny hours.
Stream 2: Export income (real, but smaller than you think)
When your panels generate more than you use and your battery is full, the surplus goes to the grid. Under the Smart Export Guarantee (SEG), your energy supplier must offer you a tariff for this exported electricity.
Here's what the major suppliers were paying in March 2026:
| Supplier | Tariff | Rate (p/kWh) |
|---|---|---|
| EDF | Export Exclusive 12m | 20.0 |
| OVO | SEG Install Exclusive | 20.0 |
| E.ON Next | Export Premium v3 | 17.5 |
| British Gas | Export & Earn Plus | 15.1 |
| Octopus | Outgoing Fixed | ~15.0 |
| Octopus | SEG (basic) | 4.1 |
| EDF | SEG Export Variable | 3.0 |
The spread is enormous. The best tariffs pay 15–20p/kWh but typically require you to be on that supplier's import tariff. The basic SEG rates are 3–5p/kWh — barely worth the paperwork.
Notice the catch: a battery reduces your export income because it captures the surplus that would otherwise be exported. The financial logic only works because the battery saves you more on avoided import (at 24.5p/kWh) than you lose in export income (at 15p/kWh).
Stream 3: Battery arbitrage (the advanced play)
If you have a battery and a time-of-use tariff, you can play the spread: charge the battery when electricity is cheap (overnight) and discharge when it's expensive (peak evening hours).
Octopus Flux is the most established tariff for this: off-peak import at ~18p/kWh, peak export at ~24p/kWh. With a 10kWh battery cycling once daily, that's roughly £0.60/day or £220/year from arbitrage alone.
Reality check: Battery arbitrage income is modest per cycle. It's a nice bonus on top of solar self-consumption, not a standalone business case. If someone quotes you £500+/year from arbitrage alone, ask for their assumptions.
The full picture: realistic annual income by setup
| Setup | Installed cost | Annual benefit | Payback |
|---|---|---|---|
| 4kWp solar only | £5,500–£7,000 | £500–£700 | 8–12 years |
| 4kWp solar + 5kWh battery | £8,500–£11,000 | £750–£1,100 | 9–13 years |
| 4kWp solar + 10kWh battery + smart TOU | £10,500–£14,000 | £1,000–£1,500 | 8–12 years |
| 6kWp solar + 10kWh battery + smart TOU | £12,000–£16,000 | £1,200–£2,000 | 7–11 years |
What most guides won't tell you
1. The best tariffs have lock-in. EDF's 20p export rate requires their linked import tariff. E.ON's 17.5p requires E.ON installation. You're not free to shop around as easily as the headline rates suggest.
2. VAT is currently 0% on residential solar and batteries (extended through at least 2027). This saves you roughly 20% on the installed cost.
3. Your roof matters more than your panels. A 4kWp system on a south-facing 35° roof generates roughly 30% more than the same system on an east-facing roof.
4. Export meters aren't always accurate. If you don't have a smart meter with half-hourly readings, your export is deemed (estimated) rather than measured.
5. The real winner is reducing import, not maximising export. Every pound you save on avoided import is worth more than every pound earned from export, because import costs 24.5p/kWh while even the best export rates pay 20p.
How to know if it's worth it for your home
The prosumer economics depend on your specific situation: roof orientation, household usage pattern, current tariff, and how much you're willing to engage with tariff optimisation.
Generic calculators give generic answers. What you need is a model that accounts for your home's actual generation potential, your real consumption profile, and the tariffs available to you.
That's what our home score does.
Sources: Ofgem price cap Q2 2026, SEG tariff data from supplier websites (March 2026), MCS generation estimates for UK installations, Octopus Energy tariff schedules, Solar Energy UK market data.