One of the biggest decisions Manchester homeowners face when going solar is whether to add battery storage or stick with panels only. Both options have merit, but the right choice depends on your energy usage patterns, budget, and long-term goals. In this article, we compare the two setups using real data from installations across Greater Manchester.
Solar Panels Only: How It Works
With solar panels only, your system generates electricity during daylight hours. Anything you use immediately is free. Anything you do not use gets exported to the grid through the Smart Export Guarantee (SEG), earning you around 15p per kWh. The catch? Most Manchester households use the majority of their electricity in the morning and evening — before the sun is strong and after it has set. Without a battery, self-consumption typically sits between 40% and 55%, meaning nearly half of your solar energy is exported.
Solar Plus Battery: The Upgrade
Adding a battery stores your daytime excess for use in the evening. Self-consumption jumps to 70-85%, dramatically increasing your savings. A 5kWh battery is sufficient for most 3-bedroom homes in Didsbury or Chorlton, while larger properties in Altrincham may benefit from 10-13kWh systems. The battery also lets you buy cheap overnight electricity on time-of-use tariffs and store it for peak hours, adding another layer of savings.
- Solar only, 4kW system: £700-£900/year savings, 6-8 year payback
- Solar + 5kWh battery: £1,100-£1,400/year savings, 8-10 year payback
- Solar + 10kWh battery: £1,400-£1,800/year savings, 9-11 year payback
When Is Battery Storage Essential?
If you work from home or are retired and use electricity during the day, the case for a battery is less urgent — you are already consuming your solar generation. But for households where everyone is out during the day, a battery is transformational. We see the biggest battery payback in homes where the residents leave at 8am and return at 6pm. The battery captures that daytime generation and powers the evening routine.
A Chorlton family with two working parents added a 10kWh battery to their 6kW system and saw their annual energy bills drop from £1,800 to under £400. The battery paid for itself in under 8 years.