I have an Axpert King 5K inverter bought 5 months ago. As per the user manual, output source priority setting 01 = USB, operation logic setting 10 = ECO and bypass function setting 23 = BYE so that "inverter can work in bypass mode if utility is available". This worked well for a couple of months with the inverter letting the utility power my house, switching to the batteries only when the utility is not available.

Recently, for about two weeks now, when the inverter enters bypass mode, the inverter screen shows that the bypass function is active yet no power reaches the house, despite utility power being received and used for charging the batteries, also confirmed by the inverter screen.

When disabling bypass mode (setting 10 = AUT and setting 23 still = BYE), the power is restored but loads cannot exceed the inverter's maximum rating of 5KW. Bypass mode is required for larger loads when the utility is active and battery backup is not required. Else we remain limited by the inverter's capacity when actively supplying power.

My aim is to get back to the point where the inverter is bypassed when there is utility power and/or high load. Any help would be appreciated, thanks.

20 hours ago, 0 |>\/\/3|<|<3Я said:

Recently, for about two weeks now, when the inverter enters bypass mode, the inverter screen shows that the bypass function is active yet no power reaches the house, despite utility power being received and used for charging the batteries, also confirmed by the inverter screen.

It sounds to me as though one or two of your relays has a burned contact or coil. They (both active and neutral are switched) are represented by the upper switch in this single line block diagram:

The other main relay (represented by the lower switch in the above diagram) must be working for non-bypass mode to work.

I can't see any option other than repair, warranty if that's possible, or out of pocket. Or put less loads through the inverter, so you can stay in non-bypass mode.

Edited July 12, 20206 yr by Coulomb

Thanks @Coulomb. The supplier has in the meantime also indicated that the relay is likely to be the problem. The inverter is heading back to the supplier tomorrow for repairs under warranty, since it's less than 6 months old. Once concluded, will share my experience with the supplier here to help others purchasing in South Africa.

Hi all,

I also having Bypass problems on my Axpert king 5kw inverters, all be it slightly different? If the load exceeds my 2 x parallel Axpert Kings ratings, then the relays start chattering and my home loses power?  In the past it would switch to bypass and soldier on?  I have checked setting 10 and setting 23.  Mine are set as follows, 10: ONL and 23: bYE.  When load is not exceeded everything runs sweetly.  Any advise would be greatly appreciated as I would like it to switch to bypass as it did in the past and then back to inverter when load subsides.

My setup

2 x Axpert Kings 5KW in parallel

2 x 3500 Pylontechs

1 x ICC PIE controler

24 x 300W solar panels

2 hours ago, Twakdaddy said:

If the load exceeds my 2 x parallel Axpert Kings ratings, then the relays start chattering and my home loses power?

That sounds serious. Is it possible that the battery's BMS is disconnecting due to excessive battery voltage?

Also try AUt for setting 10. ONL (ONLine) seem to talk only about "line mode", which in the King isn't the same as bypass mode. 

@Coulomb, thanx for the advice, I tried the change to AUT on setting 10 without any change.  I did also turn off my inverters with their power switches at which they both indicate that they are in bypass mode yet no power is coming out of the inverters?  This sounds to me as if the relays are not functioning?
 

9 hours ago, Twakdaddy said:

I did also turn off my inverters with their power switches at which they both indicate that they are in bypass mode yet no power is coming out of the inverters?

I would expect the inverters to go into standby mode when the power switch is off. In bypass mode, per the manual, the load hexagon isn't present at all.

Certainly if you are in a bypass mode (BYPASS icon on, as below) and AC-in is present, you should be powering your loads. If not, that does sound like a relay fault.

( Image in next post)

Edited December 25, 20205 yr by Coulomb

Dang. I uploaded the wrong image, deleted it and replaced it, now it doesn't seem to want to come up. I'll try again:

 

Edited December 25, 20205 yr by Coulomb