How Much Solar & Battery Do I Really Need?

How to Size Your Solar & Battery System for Maximum Savings

If you’ve started looking into solar and battery storage, one of the biggest questions is: how much do I actually need?

At Sapphire Solar, we make system design simple and tailored. Here’s how we help you figure it out — without the confusing jargon.

💡 Start with Your Energy Bill

As a rule of thumb:

• For every $1,000/year of energy usage, you’ll need about $5K–$7K worth of solar + battery gear

• Want to eliminate a $2,000/year bill? Aim for a system around 10–14 kW with a 10–15 kWh battery

The size of your household, appliance use (especially electric heating, hot water, EVs), and future energy goals all play a role too.

🔋 Battery Sizing: Not Too Big, Not Too Small

Your battery should be large enough to:

• Store your excess solar (not let it go to waste)

• Power your home at night

• Keep essentials running during blackouts

Most homes benefit from a 10–15 kWh battery, with larger homes going up to 20–25 kWh.

📊 What We Do Differently

At Sapphire Solar, we don’t give you cookie-cutter systems. We:
✅ Analyse your power bills
✅ Understand how you actually use energy
✅ Consider whether you want blackout backup, EV charging, or gas transition
✅ Design for maximum savings and future growth

✅ Bonus: We Make It Affordable

With new battery rebates, STCs, and interest-free loans, you might pay less upfront than you expect — and be cash positive from day one.

Want to know your ideal setup?
👉 Book your free quote today — we’ll break it all down, with no pressure.