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Generator vs Battery use on Axpert King


JakesW
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Hi All

First post on the forum, so excuse the ignorance. Recently moved over to Axpert King(two inverters in parallel). Have been off-grid on farm for the last three years, so in all but the most cloudy of days I manage happily without a generator. I was under the impression with the Axpert King I could connect "smallish" generator to it, and would have the ability to use the power supplied by the generator for charging the batteries only i.e. rest of load is supported by PV and battery. Hence a 2kVa generator can be connected to the inverters, but the inverters still have the ability to push out 10kVa. Was this the correct assumption? Or is the utility used to power all the loads and the solar power generated only charges the batteries with the generator connected. This would mean my 2kVa generator will quickly run out of steam with larger loads? 

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On 2021/02/01 at 10:02 PM, JakesW said:

First post on the forum

Welcome.

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I was under the impression with the Axpert King I could connect "smallish" generator to it, and would have the ability to use the power supplied by the generator for charging the batteries only i.e. rest of load is supported by PV and battery. Hence a 2kVa generator can be connected to the inverters, but the inverters still have the ability to push out 10kVa.

 

Good question; I hope to be learning much more about Kings soon. Hopefully some actual King owners can answer that properly. My understanding is that you should be able to achieve what you want (i.e. supply only the average load, let the PV and if necessary the battery handle the peaks), as long as you use the right modes and settings. The Kings have a much more complex set of settings than the other models.

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Or is the utility used to power all the loads and the solar power generated only charges the batteries with the generator connected.

That would happen if the inverters decide to go into bypass mode, where AC-in is connected to AC-out directly. But they should only have to do that if you ask them to (ECO mode for example), or if you exceed the capacity of the DC-AC converters (5 kW and 5 kVA each). With two of them, unless you're running something extraordinary, and provided that your battery can handle the load, that should be very rare.

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