The 20.48kWh model is the most popular, but almost everyone asks: Can this battery last through the night during a power outage? How long does it last?
Let’s be honest: there’s no set answer—it all depends on how many devices you have running at the same time.
First, let’s calculate the actual usable capacity
Rated at 20.48kWh, but you can actually use 80%–90% of that: Actual usable capacity: 16.4–18.4kWh
Actual runtime under different loads
500W (refrigerator + lights + Wi-Fi): 32–36 hours
1000W (basic appliances + TV + computer): 16–18 hours
2000W (plus water pump + small kitchen appliances): 8–9 hours
3000W (small air conditioner running): 5–6 hours
4000W (multiple high-power devices): About 4 hours
Why such a big difference?
Refrigerators and air conditioners draw high power during startup
Air conditioners are major power consumers; running one cuts runtime in half
Solar power replenishment during the day can double the runtime
Who is the 20.48 kWh system suitable for?
Frequent power outages
Installed solar panels and want to use electricity at night
Don’t want to just cover the basics; want to maintain a normal lifestyle
Don’t want to buy a generator; find them noisy and troublesome
Practical Tips
During installation, run separate circuits for critical loads: refrigerator, lights, Wi-Fi, water pump, and essential outlets. During a power outage, avoid randomly turning on high-power devices—you’ll have no problem getting through the night.
