UPDATE:
After a few months of using the Bluetti indoors and on a few camping trips, it’s worth updating the review with some more thorough real-world feedback.
Charging speed 
Charging speed from an AC source is good, but it cannot achieve the maximum 3kW charge rate using a regular 10A (2.4kW) cable and standard outlet (used in Australia & UK). The maximum I saw was around 2.7kW, and it averaged 2.3kW, depending on the battery SOC. Also, it’s normal for the rate to reduce slightly as the battery warms up during charging. However, it still charges the battery from near empty to 100% in just over one hour, which is very good, so this is not a real concern.
Standby Power Consumption
One of the few negatives of the AC300 is the higher than average standby power consumption. When in idle mode with both the AC and DC output switched off, it uses very little power. However, when the AC output is switched on, the idle power draw (with no load) appears to be close to 60W, which is high. Most power inverters typically only draw 25 to 40W under no load, so this is close to double. When left on for 4 hours with no load, it consumed around 8% of the battery, which was rather surprising.
Fortunately, there is an ECO mode that automatically disables the AC output if no load is detected. However, it has a 4-hour delay, which is a long time. I would much prefer a 1 or 2-hour cut-off point, but unfortunately, the time is not user-adjustable. I would hope a firmware update would enable users to choose a preferred time.
