A U.K. homeowner considering solar panels and a home battery is weighing a strategy to lower electricity costs. But one unresolved question could affect whether the investment pays off: Will energy suppliers continue allowing batteries to charge at cheaper overnight rates?
Here's what to know
In a Reddit post on r/SolarUK, the prospective buyer outlined how they would use the system throughout the year.
Solar generation would help extend the battery's stored power in winter after an overnight charge. Summer would bring a different role for the panels: All their electricity would be sold, while inexpensive nighttime electricity would charge the battery.
Before purchasing the panels and battery, the homeowner asked the solar community for feedback on the plan.
For homeowners exploring storage, EnergySage offers a resource for researching battery products and comparing competitive installation estimates. Its partnership with electrification company Qmerit aims to help homeowners secure the best available battery storage pricing.
More background
Electricity purchases at the normal rate are already part of the homeowner's winter calculations. They expect to need that power from around 4:30 p.m., when the battery would be depleted.
Beyond potential bill savings, the right home battery system can provide backup power during outages. Paired with solar panels and the appropriate equipment, storage can also help households become more energy independent and support off-grid use.
What can be done?
For households primarily interested in backup for selected needs, Pila offers a plug-and-play battery alternative at a substantially lower price point than whole-home backup systems.
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The original poster said, "Are there any issues you can see with this? Does anyone anticipate something happening in the future, like energy vendors not allowing battery storage at the cheap rate or something? I'm not sure if this is a use case they condone."
Where can I learn more?
Other U.K. homeowners are asking similar questions about how much batteries can save on electricity bills. These stories explore overnight charging, export payments, free electricity periods, and storage limitations.
• A U.K. solar owner learned charging at 7p beats using solar when exports earn 15p.
• A U.K. homeowner considering battery-only storage faced warnings about G98/G99 grid connection requirements.
• A U.K. solar owner received 26 hours of free electricity and questioned battery cycling returns.
• A U.K. homeowner's battery savings looked uncertain with overnight charging costing 25p.
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