August 10, 2026

A Guide to Commercial Solar Battery Storage

Solar battery storage is increasingly being installed alongside commercial solar PV systems as organisations look to improve energy resilience, optimise onsite generation and reduce exposure to volatile electricity pricing. 

Rather than exporting surplus generation to the grid, battery systems enable businesses to retain and use excess energy, improving the value of onsite renewable systems.

In this guide, we explain how solar battery storage works, its benefits and what you need to know regarding installation.

What is solar battery storage?

Solar battery storage is an energy management solution that enables excess electricity generated by a solar system to be captured and stored for later use.

This stored energy is typically deployed during periods of peak demand, higher tariff exposure or reduced onsite generation, helping to optimise energy consumption patterns and improve overall system efficiency.

How does a solar battery storage work?

Solar panel systems generate electricity during daylight hours. When generation exceeds demand, the surplus energy is directed into a battery storage system rather than being exported to the grid.

Once stored, this solar energy can be used at times when it’s operationally advantageous, such as during peak tariff periods.

If the solar storage battery reaches full capacity, any additional excess electricity is exported to the grid. In some cases, organisations may be able to monetise this through tariff arrangements, such as the Smart Export Guarantee (SEG).

Advantages of commercial solar panels with battery storage

Integrating solar battery storage introduces several strategic benefits:

Increased utilisation of onsite renewable generation
Reduced reliance on grid imports
Lower energy bills
Potential revenue generation through export mechanisms

What size solar battery do I need?

The size of the solar storage battery will be driven by operational load profile rather than system size. A tailored and optimised solar design will consider how, when and where energy is consumed across the site. Key inputs typically include:

Total and peak electricity demand
Solar PV system capacity and generation profile
Daily and seasonal consumption patterns
Tariff structure and peak pricing exposure

For organisations with significant evening or overnight demand, larger storage capacity may be required to maximise utilisation of stored energy.

Future energy demands should also be considered. If you plan to install EV chargers, heat pumps or expand your operations, you may benefit from a larger battery system. 

Scalable solar battery panel systems are also an important consideration for long-term efficiency, as demand has the potential to grow through increasing electrification, including EV charging, heat pumps or expanded operational capacity.

What happens during solar battery installation?

A solar battery installation usually begins with a detailed technical assessment of the existing energy infrastructure. This includes evaluating current solar PV systems, electrical capacity, site constraints, and operational demand.

Following tailored design, the solar battery system is installed and integrated with the existing solar system, often alongside inverter or control system upgrades where required.

Installation timescales can vary depending on the size and complexity of the system, but work can be structured to minimise disruption and ensure business activity can continue throughout the installation.

Is a solar panel battery worth it?

The commercial viability of solar battery storage will be determined by energy consumption patterns and tariff exposure. A solar panel battery is typically most effective when businesses: