SolarIs Battery Storage Worth It in CA6?
Carlisle, Cumbria
Solar + Battery Analysis for CA6
Without a battery, your 4kW solar system in CA6 generates 3,234 kWh per year. You use roughly half directly (saving £385 on bills) and export the rest (earning £194 via SEG). Total: £579/year.
Adding a battery increases self-consumption from 50% to approximately 80%. Instead of exporting cheap (at 12p/kWh), you store and use that energy yourself (worth 23.8p/kWh). This boosts annual savings to £693/year — an extra £114/year.
Battery Cost Comparison
| Battery | Capacity | Typical Cost |
|---|---|---|
| GivEnergy All-in-One | 5 kWh | £2,500 - £3,500 |
| GivEnergy | 9.5 kWh | £3,500 - £5,000 |
| Sunsynk | 5.12 kWh | £3,000 - £4,000 |
| Fox ESS | 5.76 kWh | £3,000 - £4,500 |
| Tesla Powerwall 2 | 13.5 kWh | £8,000 - £10,000 |
When Battery Storage Makes Most Sense
- High electricity usage — if you use most energy in evenings, a battery stores daytime solar for later
- EV owners — charge your car from stored solar energy overnight or in the evening
- Heat pump users — offset the heat pump's electricity with stored solar
- Low SEG rate — if your export rate is low, storing energy is more valuable than exporting
- Time-of-use tariffs — charge the battery from cheap overnight grid electricity and use it during peak hours
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Frequently Asked Questions
Is battery storage worth it in CA6?
Adding a battery to solar panels in CA6 increases your self-consumption from 50% to approximately 80%, saving an additional £114 per year. At an average battery cost of £5,000, the battery alone pays back in approximately 43.9 years.
How much does a solar battery cost in CA6?
A typical home battery (5-10kWh) costs between £2,500 and £6,000 depending on capacity and brand. Popular options include GivEnergy (from £2,500), Tesla Powerwall (£8,000-10,000), and Sunsynk (from £3,000). We estimate £5,000 as a mid-range average.
What size battery do I need in CA6?
With a 4kW solar system generating 3,234 kWh/year in CA6, a 5-10kWh battery is typically sufficient. A 5kWh battery covers evening usage for most households. If you have an EV or heat pump, consider 10kWh+.
Solar panels in CA6 • Battery storage guide • Solar panel costs • Solar + EV charging