Battery Storage System

Battery storage systems enable rental properties equipped with solar PV panels or other renewable electricity sources to store surplus energy generated during the day for use later, typically during evenings and nights. By increasing self-consumption of renewable energy, battery storage reduces reliance on grid electricity, lowers energy bills for tenants, and contributes to more sustainable energy use.

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For landlords, battery storage provides a practical way to maximise the benefits of renewable installations, improve EPC ratings, and offer tenants a greener, more cost-effective home.

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Why Choose Battery Storage Systems?

While solar PV panels produce electricity during daylight hours, much of this generation often occurs when occupants are out or using less electricity. Without storage, surplus energy is exported to the grid, and electricity must be purchased at higher rates in the evening.

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Battery storage systems capture this surplus generation and save it for later use, increasing the proportion of renewable electricity consumed onsite. This reduces tenant energy costs and carbon emissions by minimising grid electricity dependence, particularly during peak pricing periods.

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In addition, battery storage enhances property energy resilience by providing backup power during outages if configured with suitable equipment.

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Regulations and Financial Support

Installing battery storage systems involves electrical work subject to building and safety regulations. Systems must comply with UK wiring standards and, where integrated with solar PV, meet microgeneration certification requirements.

Landlords can access limited but growing financial support programs aimed at encouraging battery adoption:

Available grants and funding:

• The Energy Company Obligation (ECO4) scheme may provide funding for battery storage as part of broader energy efficiency or renewable energy improvements, depending on eligibility.

• Some regional or local authority schemes offer incentives or grants for battery installations alongside solar PV renewables.

• Landlords can potentially benefit from reduced electricity bills and income through the Smart Export Guarantee (SEG) by optimising self-consumption with batteries.

• Eligibility often depends on EPC ratings (commonly E or below), tenant benefits status, and property-specific technical factors.

• Upfront costs remain a consideration, but grants and improving battery affordability enhance financial feasibility.

Landlords should discuss funding options with accredited installers and energy advisors to maximise support.

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Benefits to Landlords

 

Battery storage systems provide several advantages:

• Increased Self-Consumption: Maximise use of generated solar electricity, reducing grid electricity purchases and cutting tenants’ energy bills.

• Improved EPC Ratings: Enhanced renewable energy use helps boost property energy efficiency ratings.

• Energy Resilience: Potential backup power capabilities improve property attractiveness and security.

• Environmental Impact: Increasing onsite renewable energy use lowers carbon emissions and supports UK net zero targets.

• Financial Returns: Savings on electricity costs and potential SEG payments combined with lower peak tariff usage generate financial benefits over the system lifespan.
   

Common Questions and Concerns

• How long do batteries last? Lithium-ion batteries typically have a lifespan of 10 years or more, depending on usage and maintenance.

• Are batteries safe? Modern battery systems include multiple protective features to prevent overheating, short circuits, and other hazards.

• Is installation disruptive? Installation is relatively straightforward and usually completed within a few days with little tenant inconvenience.

• Can batteries provide standby power? Some systems can be configured with backup capability for power outages, but this depends on system design and additional equipment.

• Do batteries require maintenance? Regular monitoring is recommended, but batteries generally require low maintenance.

 

Getting Started

Landlords should begin by assessing the existing or planned solar PV system and discussing with qualified installers whether battery storage is suitable and beneficial.

Verify eligibility for grants and incentives to help finance the upfront cost of batteries.

Plan installation timing carefully to coordinate with solar PV works or during tenancy transitions to minimise tenant disruption.

After installation, landlords should monitor system performance and inform tenants about optimising battery use to maximise savings.

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Battery storage systems are an innovative energy upgrade allowing landlords to maximise the value of onsite renewable energy, reduce tenant energy bills, and raise EPC ratings. Supported by government incentives and installed by accredited professionals, battery systems are a practical and long-term investment in sustainable rental properties.

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For retrofit recommendation, check grant eligibility and connect with qualified installers, landlords can register for eco-Landlord and take the next step toward a more energy-efficient rental property.