Battery Storage: Enhancing Your Solar Panels ROI
A solar PV system without battery storage exports surplus generation to the grid at Smart Export Guarantee rates. A battery system stores that generation and deploys it when it is worth more, during peak tariff periods, overnight or during periods of high grid prices.
For commercial clients on time-of-use tariffs, the financial impact is significant. For domestic clients with EV charging or overnight consumption, battery storage changes the payback calculation meaningfully. For agricultural and rural clients, it provides operational resilience that grid-only power cannot.
Battery costs have fallen considerably in recent years. Combined with rising grid tariffs and more sophisticated time-of-use pricing, the case for battery storage alongside solar panels and renewable energy systems has never been stronger.
Renewable Industry Certifications
Four Ways Battery Storage Solutions Creates Value
Energy Cost Reduction
Store generation during the day. Discharge during peak tariff periods. Reduce the amount of expensive grid electricity you consume. For businesses on variable or time-of-use tariffs, the savings are directly measurable.
Demand Charge Management
Many commercial energy contracts include demand charges based on peak consumption. A battery storage system limits peak demand by discharging at the right moment, reducing charges that can represent a significant portion of a commercial energy bill.
Grid Services Revenue
Larger commercial battery systems may be eligible to participate in grid services schemes operated by National Grid ESO. These pay battery owners for the ability to discharge energy rapidly in response to grid frequency events, creating a revenue stream alongside energy savings.
Resilience and Backup Power
A battery system configured for backup operation continues to power critical loads during a grid outage. For manufacturing, cold storage, agricultural operations or any business where a power interruption has a direct operational cost, this has real value.
Multi-Brand, Independent Batteries for Solar Power Systems, Built for the Long Term
SPI Renewables works with a range of established battery storage manufacturers and does not depend on any single supplier. We specify hardware based on what is most appropriate for each project, considering performance, warranty terms, track record and the long-term viability of the manufacturer’s UK operation.
We also provide long-term monitoring and maintenance for every BESS installation. Battery capacity degrades over time. Without active monitoring, owners often do not realise performance has declined until bills fail to reduce as expected. SPI monitors state of charge, cycle counts, capacity and fault conditions, and responds when issues arise.
If you have a existing battery storage system and are concerned about ongoing support, we can carry out a system assessment and discuss your options.
How a Battery Storage Project Works With SPI
