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KH inverter USB to Modbus connection query
Posted: Sun Jan 19, 2025 12:16 pm
by fatfairy
I have seen on the forum the strong advice that when using the H1 inverter one should avoid the USB port connection for attaching the Modbus. My install will have the KH 8kwh inverter which also has a USB connection. Does the same advice apply to this model regarding the limitations the USB connection imposes on parts of the data transfer. The manual states that the terminal is WiFi / 4G /USB if that is anything to go by. Many thanks for any thoughts on this.
Re: KH inverter USB to Modbus connection query
Posted: Sun Jul 27, 2025 8:25 am
by Will
sadly yes, the USB on fox inverters is amp limited to a point you can't really use it as a power source.
Re: KH inverter USB to Modbus connection query
Posted: Sun Jul 27, 2025 3:35 pm
by fatfairy
Thanks Will for that info, Frank
Re: KH inverter USB to Modbus connection query
Posted: Mon Aug 04, 2025 2:18 pm
by reef
Will wrote: ↑Sun Jul 27, 2025 8:25 am
sadly yes, the USB on fox inverters is amp limited to a point you can't really use it as a power source.
Is this always the case Will? I've been running my Elfin EW11A without issue for a year using the inverter USB as the power source on my H1-5.0-E. It hasn't skipped a beat! It is only using about 0.14A though at 5V, so not much.
Re: KH inverter USB to Modbus connection query
Posted: Mon Aug 04, 2025 3:17 pm
by Will
Technically, fox advises not to power anything from the usb as it's there for firmware updates or the datalogger, depending on the model. If it works, then great, but I don't ever recommend it for net new people.