Unused solar electricity is not wasted. It either flows to the grid for payment through the Smart Export Guarantee or is stored in a battery for later use. Without storage or an export tariff, surplus generation earns nothing, which is why how you use excess energy matters as much as how much you generate.

Table of Contents

• What actually happens to solar energy you don’t use at home?

• Can you sell your unused solar energy back to the grid?

• How does home battery storage change what happens to your surplus solar?

• Is it worth adding battery storage to a solar system in West Yorkshire?

• How does Zengen help Halifax homeowners make the most of unused solar energy?

• What affects how much surplus solar you actually have?

• Key Takeaways

• References

What actually happens to solar energy you don’t use at home?

Surplus solar electricity follows one of two default paths: export to the grid or diversion to a battery. If neither is in place, the energy simply goes unused. Solar systems do not waste power in the way people assume, because the inverter and meter manage the flow automatically. A typical 4.85kW system in Halifax generates between 3,450 and 4,500 kWh per year, much of it when the home is empty, according to Zengen. The best route depends on your tariff, your battery, and your usage pattern.

Can you sell your unused solar energy back to the grid?

Yes. The Smart Export Guarantee (SEG) is the mechanism for selling surplus electricity to a licensed supplier. Smart tariffs such as Octopus Outgoing Fixed pay around 15p per kilowatt-hour, according to Zengen. Export rates vary by supplier and tariff, so it is worth comparing before committing. Export payments are separate from bill savings, which for a typical Halifax system run at £650 to £890 per year, according to Zengen.

How does home battery storage change what happens to your surplus solar?

A battery captures daytime generation for evening and overnight use, when household demand is highest. Battery storage reduces grid dependence by up to 80 to 90%, according to Zengen. A 10kWh battery is sufficient for a three to four-bedroom home’s evening and overnight needs. Batteries can also charge from cheaper off-peak electricity depending on your tariff.

Is it worth adding battery storage to a solar system in West Yorkshire?

It depends on your budget and consumption pattern. The average 4.95kWp solar and battery system in Yorkshire costs £12,406, according to Zengen. The average Yorkshire system includes 11 panels at 450W peak with a 10kWh battery. Payback periods are now typically 8 to 12 years. Zero per cent VAT on domestic solar installations reduces upfront cost by up to £2,000, according to Zengen.

How does Zengen help Halifax homeowners make the most of unused solar energy?

Zengen provides Solar Installation services for professionally designed systems across Halifax, West Yorkshire and North Yorkshire. The company also offers Battery Storage for storing excess daytime solar for evening use, with system monitoring and aftercare. Zengen designs systems around the property, roof space and energy requirements of each customer, with clear advice from survey through to commissioning.

What affects how much surplus solar you actually have?

Roof orientation and pitch play a major role. Pennine valley slopes in areas like King Cross, Pellon, Ovenden and Illingworth angle roofs at near-optimal 35° elevation, according to Zengen. Yorkshire receives 1,195 kWh per square metre of sunlight annually, 8% above the UK national average. Halifax receives approximately 1,280 hours of annual sunshine. Household consumption patterns during daylight hours determine how much is left over.

Key Takeaways

• Unused solar electricity is either exported to the grid, stored in a battery, or lost if neither option is in place.

• The Smart Export Guarantee pays households for surplus electricity, with smart tariffs such as Octopus Outgoing Fixed paying around 15p per kWh.

• A typical 4.85kW system in Halifax generates between 3,450 and 4,500 kWh per year.

• Battery storage reduces grid dependence by up to 80 to 90%, and a 10kWh battery suits a three to four-bedroom home.

• The average 4.95kWp solar and battery system in Yorkshire costs £12,406, with payback typically 8 to 12 years.

• Yorkshire receives 8% more sunlight per square metre than the UK national average.

• 0% VAT on domestic solar installations reduces upfront cost by up to £2,000.

References

1. Zengen – Articles | Hear our stories

2. Solar Panels Halifax & West Yorkshire – Zengen