If you're building in a rural or remote part of Australia, one of the biggest decisions you’ll face is whether to connect to the electricity grid or go off-grid with a solar and battery system. It’s not just a lifestyle choice; it’s a financial one too. At Stand Alone Power, we design and install complete off-grid solar systems across Australia. Here's a simple breakdown comparing the total cost of connecting to the grid versus installing an off-grid or stand-alone solar power system over 15 years.
Upfront Costs
On-Grid Power
Connecting to the grid in remote areas often surprises new property owners. Between trenching, poles, network upgrades and connection fees, it’s common for costs to reach $30,000 or more.
Off-Grid Solar
A complete off-grid system, including panels, an inverter, a battery bank, and system controls, costs around $35,000 upfront. It’s slightly more than the grid connection, but it removes your dependency on electricity retailers entirely.
Long-Term Costs
Grid Electricity Usage
Once you’re connected, you’ll pay regular power bills. Over 15 years, assuming modest price increases, this adds up to around $25,000 in electricity charges.
Battery Replacement
Off-grid systems have minimal running costs. The main expense is battery replacement, typically required after 15 years. Depending on your system size and battery technology, this could cost around $15,000 in today’s money, likely less as battery prices are decreasing.
Long-Term Costs
On-Grid Electricity Bills
Even after you’ve paid for grid connection, you’ll continue to receive electricity bills. Over 15 years, assuming typical usage and rising electricity prices, total energy costs will likely reach $25,000. Even though the off-grid system costs slightly more upfront, over 15 years it ends up saving you about $5,000. And that’s before factoring in energy price hikes, blackouts, or environmental benefits.
Total on-grid cost over 15 years:
$30,000 (connection) + $25,000 (usage) = $55,000
Off-Grid Battery Replacement
Off-grid systems require little maintenance, but the battery bank will need replacing after around 15 years. A new battery system is estimated to cost $15,000 in today’s money, likely less as battery prices are decreasing.
Total off-grid cost over 15 years:
$35,000 (system) + $15,000 (battery) = $50,000
Why Off-Grid Makes Sense
- No ongoing power bills
- Complete energy independence
- Ideal for rural and remote properties
- Sustainable and low-maintenance
- Scalable and customisable
Off-grid solar offers predictable costs, renewable energy, and peace of mind—especially for remote homes, farms, and eco-conscious builds.
Start Your Off-Grid Journey
At Stand Alone Power Systems, we specialise in designing and installing reliable, customised off-grid solar systems for homes, farms, and businesses across Australia. If you’re building in a remote area or looking to escape grid reliance, please contact us for advice.