HighFlow Energy Sizing Guide
Sizing Guide
Your bill-free electricity allowance depends on the size of your solar system, battery and battery inverter. Each one must meet the minimum for a tier. The smallest of the three sets your tier.
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| Tier | Bill-free allowance (per month) | Min. battery (usable) * | Min. battery inverter | Min. solar system |
|---|---|---|---|---|
| Tier 500 | 500 kWh | 25 kWh | 5 kW | 6 kW |
| Tier 600 | 600 kWh | 28 kWh | 6 kW | 6 kW |
| Tier 700 | 700 kWh | 28 kWh | 8 kW | 8 kW |
| Tier 800 | 800 kWh | 30 kWh | 8 kW | 8 kW |
| Tier 900 | 900 kWh | 40 kWh | 10 kW | 10 kW |
| Tier 1000 | 1,000 kWh | 50 kWh | 15 kW | 12 kW |
* All minimums are “or larger”.
Example: a home with 6.6 kW of solar, a 5 kW inverter and a 50 kWh battery qualifies for Tier 500. The battery is big enough for Tier 1000, but the 5 kW inverter sets the tier.
If you joined through one of our installer partners, you may receive a bonus allowance for an initial period. Your welcome letter shows your allowance and when any bonus ends.
Not sure what size your system is?
Your solar, battery and inverter sizes are usually on your installer’s quote or invoice, or in your battery app. You can also run our quick eligibility check and we’ll work out your tier for you.
Pricing for each tier
Each tier has its own plan, with pricing that depends on your electricity network. You’ll find the Basic Plan Information Document for every tier and network on our Residential Electricity Plans page.
Need help?
If you have questions about your tier or your allowance, contact:
HighFlow Energy Customer Care
Email: [email protected]
Phone: 1300 650 849, Mon to Fri 8.30am to 4.30pm
We’re here to help.
Disclaimer
The tiers and minimum system sizes on this page are current as at October 2026 and may change from time to time. Changes apply to new sign-ups unless we tell you otherwise. Your Residential Electricity Agreement, VPP terms and Price Schedule set out the terms that apply to your account.