Brownout backup simulator
Pick a battery, the appliances you want to keep running and when the brownout hits. Then press play to see how long your home stays powered, and how solar panels can recharge the battery during the day.
- Home uses
- 0W
- Battery
- 0kWh
- Solar used
- 0kWh
- Switch-over
- ≤10ms
Set up your brownout
Running power. The fridge figure is an average, because its compressor switches on and off.
Battery during the brownout
Show as a table
| Time | Battery | Home | Solar |
|---|
How backup works
- 1 No flicker when the grid drops The battery takes over in 10 milliseconds or less, so lights, Wi-Fi and computers keep running without a restart.
- 2 Size it to what matters Each extension battery adds 4 kWh (B4000 Elite) or 5 kWh (B5000 Elite), up to four. Big loads like aircon use up the battery fastest.
- 3 Solar keeps you going With solar panels, the sun recharges the battery during the day, so long brownouts don't have to mean long nights without power.
Ready for the next brownout?
We'll check which circuits you want backed up and size a battery and solar system for your home.
Schedule a VisitThis simulation is simplified for illustration, not a quotation. It assumes the battery starts full, keeps 10% in reserve and loses 5% each way between the battery and your appliances, and that the appliances you pick run the whole time (in real life lights, fans and aircon switch on and off, so the battery often lasts longer). Backup limits are from the TSUN data sheets: 2,500 W for the MSU4000 Elite and 6,000 W for the MAU5000 Elite (Pro version). Motors and compressors can briefly draw more when they start. Solar output follows a simple daily curve: 650 W panels making about 3,100 kWh a year per 4 panels on an average day, more when sunny and much less in a typhoon. After the battery runs out, the system restarts once the sun can run your appliances or the battery has recharged to 20%.