Store free solar energy for evenings
Emergency power during blackouts
Customisable modular battery systems
Take control of your energy with battery storage
Battery storage allows you to store excess electricity generated during the day and use it in the evening, when energy demand is highest. NEIS Solar designs systems that reduce reliance on grid electricity during peak hours, typically between 4pm and 9pm. Instead of exporting unused energy for a small return, stored power can be used when needed, helping avoid higher tariffs and improving overall energy efficiency within homes across Sunderland, Newcastle, Durham, and Teesside.
Smart features that maximise energy savings
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Increase solar self-consumption from around 30% to over 80%.
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Store unused daytime energy for evening and nighttime use.
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Charge batteries during off-peak hours at lower rates, often around 7p per kWh.
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Use stored energy during peak pricing periods, typically 28p to 32p per kWh.
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Integrate with time-of-use tariffs such as Octopus Flux and British Gas Export and Earn.
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Enable smart exporting by selling stored energy back to the grid at higher rates.
Advanced technology, backup power, and financial benefits
NEIS Solar installs lithium iron phosphate battery systems designed for safety, durability, and long-term use. These systems include 10-year warranties and are capable of over 6,000 charge cycles. With modular designs starting from 5 kWh, capacity can be expanded as needed. Units are compact and IP65 rated for flexible installation and can be seamlessly integrated with solar PV installations. Emergency power supply functionality ensures essential circuits remain active during outages, while 0% VAT on installations helps reduce upfront costs and improve overall savings.
0% VAT on Battery Storage & Estimated Annual Savings
As of March 2026, all residential battery storage installations qualify for 0% VAT. Whether you install a battery with new solar panels or add one to an existing system, you can save 20% upfront on the total cost.