COMPARISON
Solar With Battery vs Without — Edinburgh 2026
Verdict
For most Edinburgh homes, adding a battery to a solar system roughly doubles the proportion of solar electricity you use yourself (from ~30% to ~70%) and enables grid arbitrage — charging from the grid at off-peak rates overnight and using that energy during peak hours. In Scotland, where solar yield is lower and the peak/off-peak spread can be wide, grid arbitrage is a large part of a battery’s value. Solar without a battery is the simpler option. The right choice depends on your energy use pattern, tariff and budget. Both options are priced at survey, and a survey gives your exact figures for each.
The comparison at a glance
| Solar only (4 kW) | Solar + battery (4 kW + 9.5 kWh) | |
|---|---|---|
| Price | Priced at survey | Priced at survey |
| Self-consumption | ~30% of generation | ~70% of generation |
| Grid arbitrage | No | Yes — charge off-peak, use at peak |
| Savings | Savings confirmed on your written quote | Savings confirmed on your written quote |
| Backup power | No | Yes (most battery systems) |
| Export | ~70% of generation exported | ~30% of generation exported |
| Best for | Daytime use, lower budget | Evening use, time-of-use tariff |
Edinburgh yield: 894 kWh/kW/yr (MCS MIS 3002, zone 1). Exported electricity can earn smart Export Guarantee payments, with rates set by each supplier. All figures illustrative.
How solar works without a battery
A 4 kW solar system in Edinburgh generates around 3,576 kWh per year. Without a battery, you use roughly 30% of that directly (while the sun is shining and you are home), so you buy less electricity from the grid. The remaining ~70% is exported to the grid, which can earn smart Export Guarantee payments, with rates set by each supplier. Check current rates before relying on any figure.
Your actual benefit depends on your tariff, usage and how much of your generation you use at home. Savings confirmed on your written quote.
How a battery changes the equation
A battery stores surplus solar generation for use in the evening and overnight, increasing self-consumption from ~30% to ~70%. But in Scotland, the bigger benefit is often grid arbitrage: charging from the grid on an off-peak tariff and using that energy during peak hours. This works year-round, regardless of solar generation.
Because solar yield is lower than in the south of England, a Scottish battery earns much of its value from the grid, not just from the sun — making it useful even in winter.
When a battery is worth considering
- You are on a time-of-use tariff with a significant peak/off-peak spread
- Most of your electricity use is in the evening (cooking, heating, EV charging)
- You want backup power during grid outages
- You plan to keep the system for many years
When solar alone is the better choice
- You work from home and use most electricity during daylight hours
- Your budget is limited and you want the simplest system
- You are not on a time-of-use tariff (limited arbitrage opportunity)
Funding and finance
0% VAT on solar panels and batteries until 31 March 2027. There is no general grant for solar panels on their own in Scotland. Some means-tested schemes exist for lower-income households, and we will say honestly if you might qualify.
Loans available, subject to status. Exported electricity can earn smart Export Guarantee payments, with rates set by each supplier.
Get exact figures for both options
A no-obligation survey gives you a written quote for solar alone and solar + battery on your Edinburgh home. We install through MCS-certified partners.
Get my quote → or call 0141 230 0198