Maximising Solar & Battery Savings with Free Power Plans in 2026
For Australian households with solar and batteries, 2026 marks a significant shift in the electricity market. The most direct way to access ‘free’ electricity is through the new government-regulated Solar Sharer Offer or by opting into a competitive market offer from retailers like OVO Energy, AGL, or GloBird Energy. These plans are specifically designed to reward households that can shift their energy consumption to the middle of the day when solar generation is abundant.
The key is understanding that these offers aren’t a blanket discount. They provide a window of zero-cost electricity, typically for three to four hours during the day, which is ideal for charging a home battery, running pool pumps, or powering an electric vehicle. For solar owners, this means you can use your generated power to cover your morning and evening needs while leveraging free grid electricity to charge your battery for overnight use, preserving your own solar credits for when they are most valuable.
Understanding the ‘Free Power’ Landscape
In 2026, ‘free power’ plans fall into two main categories: the government-mandated offer and more flexible commercial plans.
The Federal Solar Sharer Offer (SSO)
Introduced on 1 July 2026, the Solar Sharer Offer is a regulated plan that all major retailers must provide to eligible customers in New South Wales, South East Queensland, and South Australia.
Key Features of the SSO:
- Free Window: A three-hour period of free electricity usage every day.
- NSW & SE QLD: 11:00 am to 2:00 pm.
- SA: 12:00 pm to 3:00 pm.
- Generous Cap: Usage is free up to a daily limit of 24 kWh, which is more than a typical five-person household uses in an entire day.
- No Solar Panels Required: The offer is available to all households with a smart meter, not just those with solar.
- The Catch: While the usage during the window is free, the daily supply charges and the peak/off-peak rates outside of the free period can be significantly higher than standard market offers. This makes it crucial for households to assess if they can shift enough consumption to make it worthwhile.
A comparison of Solar Sharer plans from major retailers like AGL and Origin in Sydney showed daily supply charges of over 176 c/day and peak rates exceeding 63 c/kWh, considerably higher than their respective standing offers.
Retailer Market Offers
Several retailers offer their own ‘free power’ plans, which often provide longer free periods or other incentives. These are market offers, meaning their rates and conditions can change.
| Retailer & Plan | Free Window | Daily Cap | Key Benefit |
|---|---|---|---|
| OVO Energy - The Free 4 Plan | 11 am - 3 pm (4 hours) | No daily cap (fair use applies) | Longest uncapped window, ideal for EV charging. |
| GloBird Energy - FOUR4FREE | 11 am - 3 pm (4 hours) | 50 kWh | High daily cap suits large consumption households. |
| Flow Power - 4Free | 11 am - 3 pm (4 hours) | 32 kWh | A strong option for consistent, high daytime use. |
| AGL - Three for Free | Varies by state | Check with retailer | A major retailer option, often bundled with other products. |
| Diamond Energy - Daylight Tariff | 11 am - 2 pm (NSW/QLD), 12 pm - 3 pm (SA) | 24 kWh | Aligns with the regulated SSO but may have different rates. |
How to Maximise Savings with a Home Battery
A home battery fundamentally changes the value proposition of these plans. Instead of just shifting appliance usage, you can strategically store free or cheap energy.
- Charge from the Grid for Free: During the 11 am to 3 pm window, program your battery to charge directly from the grid at zero cost. A typical 13.5 kWh Tesla Powerwall 3 could be fully charged during this period.
- Preserve Your Solar Generation: Your solar panels can continue to power your home’s daytime needs. Any excess solar generated can then be exported to the grid, earning you a feed-in tariff (FiT). In 2026, average FiTs range from 3-10 c/kWh.
- Avoid Peak Evening Prices: Use the ‘free’ energy stored in your battery to power your home during the expensive evening peak period (typically 4 pm to 9 pm), when time-of-use tariffs can exceed 50-60 c/kWh.
This strategy effectively allows you to profit from your solar exports while using free grid energy to become self-sufficient during the most expensive time of the day.
Case Study: A Sydney Household with a Tesla Powerwall 3
A Tesla Powerwall 3 (13.5 kWh) costs between $12,500 and $17,000 installed in 2026 before rebates. After the federal Cheaper Home Batteries Program rebate, which provides roughly $3,400, the net cost is closer to $9,100 - $13,600.
- Without a ‘Free Power’ Plan: The battery charges from excess solar during the day to offset evening usage, saving the household the cost of peak electricity (e.g., ~45c/kWh).
- With an OVO ‘Free 4 Plan’:
- 11 am - 3 pm: The Powerwall 3 charges fully from the grid for free.
- Simultaneously: The home’s 6.6kW solar system exports most of its generation, earning a FiT (e.g., 5c/kWh).
- 4 pm - 9 pm (Peak): The home runs entirely off the fully charged battery, avoiding high grid import costs.
By using the grid to charge the battery, the household can export nearly 100% of its solar generation, maximising FiT credits while simultaneously eliminating peak-hour grid consumption. For those looking to go a step further, combining this with a Virtual Power Plant (VPP) can unlock even greater credits. For more information on reducing upfront battery costs, see our guide to Secure Your $3,500+ Home Battery Rebate: Federal Discount Reduces Jan 1, 2027.
Are These Plans Always a Good Deal?
Not for everyone. The trade-off for free daytime power is often higher daily supply charges and punishingly high peak rates. If you cannot shift significant consumption (or don’t have a battery to store the free energy), you could end up paying more. Before switching, analyse your smart meter data and calculate your potential costs. If you are considering a full switch away from gas appliances to maximise electrical load shifting, our analysis on how to Electrify Your Home in 2026: Real Costs, Rebates & Savings Up to $15,000+ provides a detailed cost breakdown.
Bottom Line
For Australian homeowners with both solar panels and a home battery, retailer market offers like OVO’s ‘The Free 4 Plan’ currently provide the most value in 2026. The four-hour, uncapped window offers maximum flexibility for charging a battery and an EV, allowing you to reserve your own solar generation for export credits.
The government’s Solar Sharer Offer is a solid, regulated safety net but acts more as a market benchmark. Its higher surrounding tariffs mean it’s best suited for those who can be highly disciplined in their energy use. For any household with a battery, the strategy is clear: use these plans to charge your battery from the grid for free, maximise your solar exports, and use that stored energy to conquer the evening peak.