HenkFR

Could it be that the contactor takes too long to do the earth - neutral bond? Why dont you wire it up permanently? Like this:

1. Change setting 13 from APL to UPS 2. Install an earth - neutral bond on the inverter output ( I was under the impression it had one internally, but obviously not...) 3. Update the firmware Issue solved

Very interesting, thanks for sharing! So is there a known firmware version that fixes it? PS. LuxPower support done 2 firmware updates on my inverter and it didnt resolve the issue.

My scenario was exactly same as yours. Also have the clearline with no effect. Check your earth neutral bond + set setting 13 to UPS. It resolved my issues of AV equipment fuses blowing.

So what is your theory on why this happens?

Agree 100%, I have an AVS30 fitted and saves me from that scenario

If there is a voltage drop the current will increase and pop the fuse. P = I x V So say you are now running your 40W appliance on your inverter that outputs 230V. I = P / V I = 40 / 230 I = 0.17 A. So your appliance is drawing 170mA from the inverter supply, and your 200mA fuse is happy. Now the grid comes back, but only supplies 180V. Not 230. Even if it is just for a second. I = P / V I = 40 / 180 I = 0,22 A And there your 200mA fuse POPs within milliseconds. By the time you get to measure your grid output, it has gone up from the initial 180V and stabilized hopefully at 230V.

This just masks the problem. It's definitely not a viable solution in my opinion. A fuse is specked 200mA for a reason. If it is when grid returns, it means the grid voltage is lower than what the inverter output was. So either the input from grid is too low, or the inverter output too high V. You can easily track these 2 voltages in app / LuxPower monitor site.

Seems I finally resolved my issue too. 1. I changed setting 13 from APL to UPS 2. I installed a earth - neutral bond on the inverter output ( I was under the impression it had one internally, but obviously not...)

I used [email protected] Good luck, it's a frustrating process to communicate with them. (my bet is all they will do for you is update your firmware ) Please let us know here if you do come right.

And another example of people having the same issue:

I have exactly the same issue. Pops fuses of anything that has a transformer connected straight after the fuse. Amps, Powered Subwoofers, Alarm charger, etc. My dimmable LED downlights also turn off when this change over happens. Also have a cheap UPS on my PC, the UPS always beeps as if power goes off for a second or two, then back to normal. Normally happens when load shedding starts, IE when inverter switches from grid to battery. The fuses that blow point me to a voltage drop that occurs when the change over happens. Been talking to LuxPower support, they have updated firmware twice now - obviously making no difference. Utterly frustrating experience dealing with them. At least they always respond... On previous questions asked: Yes i have surge arrestors, yes there is an earth leakage, even have those protection plugs on my amplifiers, but it still happens.. There are a couple of others too with the same issue: Where to next? LuxPower seems unwilling to confirm this is an issue, and their technical support not very knowledgable. Not sure how to solve this, other than replacing the inverter with a different brand.