Off Grid Solar System Cost Calculator
Estimate the cost of an off-grid solar system, solar panels plus enough battery storage and usually a backup generator to run a property with no grid connection. Battery storage, sized for days of autonomy, is the biggest cost.
Your off grid solar system details
Your estimate sits within the typical range.
Almost every off-grid system includes a backup generator for extended cloudy periods, it is far cheaper than oversizing the battery to cover rare worst-case weeks.
Off-grid solar is sized to your actual daily usage and how many cloudy days you need to ride through. The battery is the dominant cost, so reducing usage and using a generator for backup keeps the system affordable.
💰 Ways to save
- Reduce your energy use first, every kWh you cut shrinks the panels and battery you need to buy.
- A backup generator is cheaper than sizing the battery for every rare bad-weather spell.
- Get the system properly sized, undersizing means blackouts, oversizing wastes thousands on battery.
or from $201/week over 5 years , indicative finance
How we estimate this
An off-grid solar system in Australia typically costs around $18,000 to $35,000 for a small to medium home in 2026, rising to $50,000 to $80,000 for a large home with several days of battery autonomy. The battery bank is the biggest cost.
Pricing reviewed: November 2026.
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Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding off grid solar system costs in Australia
An off-grid solar system in Australia typically costs around $18,000 to $35,000 for a small to medium home in 2026, rising to $50,000 to $80,000 for a large home with several days of battery autonomy. The battery bank is the biggest cost.
Off-grid systems are sized to your daily usage and the number of cloudy days they must ride through, and battery storage dominates the price. Reducing usage and using a backup generator rather than oversizing the battery keeps the cost down.
Frequently asked questions
How much does an off-grid solar system cost in Australia?
Roughly $18,000 to $35,000 for a small to medium home in 2026, and $50,000 to $80,000 for a large home with several days of battery storage. The battery bank is the biggest cost.
Why is off-grid solar so much more than grid-connected?
Because you need enough battery storage to run through nights and cloudy days with no grid to fall back on, and usually a backup generator. The battery bank is the dominant cost, unlike a grid-tied system.
Are you a off-grid solar installer?
Everyone on this page is working out what off grid solar system costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.