I have owned my Bluetti Apex 300 and B300K battery for a year now. I bought it primarily as backup power for my house but also to take advantage of solar power to cut my electric bill. I charged the system using (5) two hundred watt panels. I found that if it was sunny, the battery would reach full charge, even while being used, in about 3 hours. Running the TV, lights, refrigerator and computers, it would last through the day. A portable space heater could drain the battery in a matter of hours though. I love the inverter features and the app. The battery holds power for months when not being used. I am happy enough with the system that I just ordered a larger expansion battery.
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