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In this video I demonstrate backup power during a simulated grid outage (blackout) being provided by the Huawei hybrid inverter, backup box and battery. I then turn off the battery to show that backup power is provided directly from the solar panels without the need for a battery.
This 'backup without a battery' feature is also available with many other hybrid inverters, not just Huawei but they will all need some form of backup box or built-in backup capability. You cannot get this feature from almost any 'solar only' inverters.