Every week we get calls from past customers with the same handful of questions. Here are the three most common ones, with the answers we give on the phone.
1. Why has my inverter or battery gone offline?
Nine times out of ten, nothing is wrong with the system. "Offline" in the app almost always means the system has lost its internet connection, not that it has stopped working. Your solar is still producing and your battery is still charging and discharging. It just cannot report in.
The usual culprits are a new router, a changed Wi-Fi password, an NBN outage, or a provider switch. If the internet at your place changed recently, that is almost certainly it.
Before You Call
Is your Wi-Fi working on your phone, and did anything about your internet setup change? Reconnecting the inverter to the new network usually fixes it. The steps depend on the brand, and we are happy to walk you through it over the phone.
If the app shows a fault code rather than just "offline", or the inverter has a red light, that is a different situation. Call us.
2. Can I add another battery module, and can I claim the rebate on it?
If you have a modular battery, adding capacity is usually straightforward. Whether the federal rebate applies depends on one thing: whether your system has already received it.
If your battery was installed under the Cheaper Home Batteries Program, that system has had its rebate. Adding modules to it will not attract a second one. If your battery went in before the program started and never claimed, you can claim on the added capacity, as long as you are adding at least 5kWh and the total stays under the program cap. The rebate rates changed in May 2026 and are now tiered by size, so the numbers depend on what you are adding.
We check eligibility before quoting and handle the paperwork if it applies. Worth doing sooner rather than later, as the rebate steps down over time.
3. I've bought an EV and it came with a charger. Will it work with my current app?
It will charge the car. That part just works, once the charger is properly installed on a dedicated circuit, which is an electrical job we can do.
What it probably will not do is talk to your solar and battery app. A charger that comes with the car usually runs on the car brand's own app, separate from your energy monitoring. Your solar system does not know the charger exists, so you will not get automatic solar-only charging or see charging alongside your production and battery data.
If you want everything in one app and the charger to follow your solar, that needs a charger that is part of your system's ecosystem or one designed to integrate with it. Whether that is worth doing depends on what you have and how you charge. Give us a call before the sparky who "just installs chargers" turns up, and we will tell you straight what will and will not work with your setup.
Got Questions After Your Install?
Call us on 0489 077 735. If we installed your system, we would rather hear from you than have you guessing.
Get in TouchAbout the Author
Director, Flux Electrical Systems
Licensed electrician and founder of Flux Electrical on the Sunshine Coast. 15+ years in solar and battery contracting. Electrical Licence 121082. SAA Accredited for solar, on-grid batteries, and off-grid systems.