Fixed Electricity Charges: What Solar and Batteries Can Change
Separate fixed and usage charges before modelling savings from solar, batteries or changed energy use.
Energy
A daily supply charge is different from a charge for each kilowatt-hour imported. Solar and batteries can change some electricity flows, but they do not automatically remove the fixed cost of remaining connected.
What the AEMC Pricing Review actually signals
Use the actual tariff and test a different mix of fixed and variable charges when assessing a long-lived system. Export credits and avoided imports can change, so the assumptions should be visible.
Why export-only solar gets exposed
A system assessed mainly on export income can be sensitive to changes in feed-in rates, import prices and fixed charges. Check these factors:
- Feed-in rates get squeezed or export limits throttle the inverter
- Evening retail peaks still hurt because the house imports when solar is gone
- Fixed / shared access style charges rise so "using less from the grid" does not automatically mean "paying less to be connected"
Using generation at home and shifting suitable loads can reduce some variable costs. Fixed charges remain part of the comparison. Assess storage on the additional value it provides under the selected tariff.
Design for self-consumption, not export cosplay
- Compare solar size using roof conditions, household demand and export value.
- Schedule suitable hot-water, pool, dishwasher or EV loads when that suits the household and tariff.
- Specify backup requirements separately, including protected circuits and operating limits.
What this means for your next decision
An estimate should show which costs the proposed system can change and which will remain.
Review recent bills and monitoring data together. Separate daily charges from usage charges, then compare exports and imports by time of day. This identifies which costs an energy-system change might affect.
For a design assessment, bring your electricity-use profile, tariff and any backup requirements. Ask the proposal to explain both the expected savings and the costs that remain.
What the pricing review says
The AEMC published its final Pricing Review on 18 June 2026. It recommends a package of changes to market information, consumer arrangements and network pricing. Its direction should not be presented as a single fixed charge already imposed on every household.
The details of an actual bill still come from the relevant tariffs and retail contract, including when any changes take effect.
Model the avoidable costs
For a solar estimate, separate electricity used directly at home from exports and remaining imports. Keep daily charges visible. For a battery estimate, compare its effect on variable charges, exports and any applicable demand tariff with its cost and operating losses.
If a greater share of the bill becomes fixed, the variable spending available to avoid can become smaller. That can change the financial case for storage; it is not automatically a reason to buy more of it.
Contact Lightning Energy to discuss the options for your property and electricity use.
