Solar Panels and Battery Storage Explained: How Do They Work Together?

Solar energy allows homes and businesses to generate renewable electricity and reduce reliance on the grid. However, solar panels produce most electricity during daylight, while energy demand often continues into the evening. When a solar PV system generates more electricity than a property needs, battery storage can store some of the surplus for later use.

How Do Solar Panels Work?

Solar panels, also known as photovoltaic (PV) panels, convert sunlight into electricity. During periods of good daylight, they can generate electricity for appliances, lighting, heating systems, and other equipment.

If the panels produce more electricity than your property is using, the surplus may be exported to the grid, depending on your system and energy arrangement. A battery provides another option by storing some of this surplus electricity for later use.

What Is Solar Battery Storage?

A solar battery is an energy storage system designed to store electricity for later use. When your solar panels generate more electricity than your property requires, surplus energy can charge the battery.

A battery does not generate electricity itself. It stores electricity produced by your solar panels or, depending on the system, electricity taken from the grid.

How Do Solar Panels and Batteries Work Together?

A typical solar and battery system follows a straightforward cycle:

1. Solar panels generate electricity during daylight hours.
2. Your property uses the electricity it needs immediately.
3. Surplus electricity charges the battery.
4. The battery stores the energy until required.
5. Stored electricity is discharged when solar generation is insufficient.

Benefits of Solar Battery Storage

Make Better Use of Solar Energy

A battery can store surplus daytime generation for later use, particularly when electricity demand increases during the evening.

Reduce Reliance on Grid Electricity

Solar panels normally generate little or no electricity at night. Battery storage can provide access to electricity generated earlier in the day, potentially reducing the amount of energy you need to purchase from the grid.

Use More Renewable Energy

Storing surplus solar electricity and using it later can increase the proportion of your electricity demand supplied by your own renewable generation.

Greater Energy Flexibility

Battery storage gives you greater control over when stored electricity is used. Depending on the system and tariff, some batteries can also charge from the grid during selected periods and discharge later when appropriate.

How Large Should a Solar Battery Be?

There is no single battery size suitable for every property. The right capacity depends on:

• Average electricity consumption
• Solar PV generation
• When electricity is used most
• Solar PV system size
• Available installation space
• Energy goals
• Backup requirements
• Budget

Can a Solar Battery Power Your Home at Night?

Yes. A battery can provide stored electricity after the sun has gone down. During the day, surplus electricity from your solar panels can charge the battery. Later, when the panels are no longer producing enough electricity, the battery can discharge stored energy for your property.

Can Solar Batteries Work During a Power Cut?

Some battery systems can provide backup power during a power cut, but this is not automatic with every installation.

Backup operation requires suitable equipment and electrical configuration. Depending on the system, backup power may supply selected circuits or essential appliances rather than the entire property.

If backup power is important, discuss this requirement with your installer before selecting a battery system.

Do Solar Batteries Need Maintenance?

Modern battery storage systems generally require relatively little routine maintenance. However, they contain electrical equipment and should be installed, monitored, and serviced appropriately.

Is Battery Storage Worth It Without Solar Panels?

Battery storage can sometimes be used without solar panels. Certain systems can charge from the grid during suitable periods and discharge electricity later.

For many properties, combining solar PV with battery storage provides a practical way to generate renewable electricity during the day and store surplus energy for later.

What Should You Consider Before Installing a Battery?

Before choosing a solar battery, consider:

• Current electricity consumption
• Solar PV system size
• When electricity is used most
• Available installation space
• Budget
• Future energy requirements

Battery Performance and System Selection

Battery performance also depends on usable capacity, efficiency, and operating conditions. The stated battery capacity is not always the same as the amount of electricity available for everyday use. Your installer can explain the expected usable capacity and how the system is designed to operate.

It is also worth considering the battery's warranty, expected lifespan, monitoring features, and compatibility with your existing or planned solar PV system. Choosing compatible equipment and professional installation can support safe, reliable performance over time.

For households with changing energy habits, reviewing actual electricity consumption before installation can be more useful than choosing a battery based only on its advertised capacity. This can support better planning and informed investment decisions.

A Smarter Approach to Solar Energy

Combining solar panels with battery storage can provide greater flexibility over how and when you use electricity. Solar panels generate renewable electricity during daylight, while a battery stores surplus energy for later use.

A well-designed system can help you make better use of solar generation and potentially reduce reliance on grid electricity. However, every property is different. The most suitable solution depends on solar generation, electricity consumption, available space, budget, and energy goals.

Explore Solar and Battery Storage with Infinity

If you are considering solar panels and battery storage, professional system design is an important first step. The right combination of solar PV capacity, battery storage, and electrical configuration should reflect your property's needs.

Infinity can help you explore suitable options and understand how solar PV and battery storage could work together. Get in touch today to discuss your energy requirements and take the next step towards smarter, more efficient energy use.