When to add a battery (and how to choose the right one)

Thinking about adding battery storage to your solar system? It’s a smart move — one that can boost your energy independence, reduce your reliance on the grid, and future-proof your investment.

But like any big decision, timing and product choice make a real difference.

When is the right time? 

Not every solar system needs a battery from day one. But if any of the following sound familiar, it might be time to explore your options.

You’re exporting excess solar power
If your system regularly sends unused energy back to the grid (especially during the day), a battery can help you store that power and use it when it matters most — like in the evening, when usage and energy rates are often higher.

You want backup during blackouts
Some batteries provide backup power in the event of an outage, giving you peace of mind that the lights will stay on — even when the grid goes down.

You’re on a time-of-use tariff
If your energy provider charges different rates depending on the time of day, a battery can help you store cheap solar and avoid peak pricing. This is especially useful for homes with high evening usage.

You want to future-proof your system
Adding a battery now — or installing a battery-ready system — can help you stay ahead of rising energy costs and evolving tariffs.

What should you consider when choosing a battery?

There are plenty of options out there, and not all batteries are built the same. Here’s what to look for:

Capacity (kWh)
This refers to how much energy the battery can store. The right capacity depends on your daily energy usage, solar generation, and what you want to power (e.g. essential circuits or your whole home).

Compatibility
Not every battery works with every inverter or solar system. Choosing a compatible battery — or working with an installer who understands system design — is key to smooth performance.

Warranty and lifespan
Look for a battery with a strong warranty (at least 10 years or a set number of charge cycles). Also ask about degradation — some batteries lose capacity faster than others.

Expert installation
Battery storage requires proper system design, setup, and safety measures. Choose an installer with experience, certifications, and a proven track record.

Why choose RLE for your battery install?

At Roland Lawrence Electrical, we’re experts in solar and battery systems that are built to last. We offer:

• Independent, honest advice
• Custom-designed systems (no off-the-shelf solutions)
• Certified, insured installation
• Long-term support and maintenance

We’ll help you assess whether a battery is right for your needs — and if it is, recommend the right product for your system and usage.

Want to explore battery storage for your home or business?
Book a tailored consult with RLE and take the next step towards energy independence.