Inverter trips a few seconds after power drops

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marcodekock

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Hello everyone,

I have an issue thats really frustrating. I have tested this with a 12V 1200W FiveStar inverter, and 2 different 12V 1500W FiveStar inverters.
What happens is that (sometimes) when the power goes out, the inverter kicks in and switches over, and around 2 seconds later the inverter restarts, no error code on screen, just a restart and then it works again. I am using a 12V 200Ah REVOV LiFePO4 battery alongside the inverter. My draw on the system is around 300W when this happen. This also seems to happen more when my PC has been drawing power for a couple of hours, it does not happen every time either.

Any advice would be welcomed.
 
Naks said:
I would start with checking the resistance of your Earth points, and then replacing the Earth Leakage breaker
Click to expand...
I do not see what the EL has to do with this?

My MECER 1200VA with a REVOV battery does the same, very irritating. Not sure if it is the Revov or the inverter.
Will take my multimeter to the revov tonight and see if the voltage does anything funky when i
 
marcodekock said:
Hello everyone,

I have an issue thats really frustrating. I have tested this with a 12V 1200W FiveStar inverter, and 2 different 12V 1500W FiveStar inverters.
What happens is that (sometimes) when the power goes out, the inverter kicks in and switches over, and around 2 seconds later the inverter restarts, no error code on screen, just a restart and then it works again. I am using a 12V 200Ah REVOV LiFePO4 battery alongside the inverter. My draw on the system is around 300W when this happen. This also seems to happen more when my PC has been drawing power for a couple of hours, it does not happen every time either.

Any advice would be welcomed.
Click to expand...

What is the inverter running, list everything.
 
The battery could be failing to deal with the surge demand.

Check on the settings of the inverter, there could be some setting that affects this.
 
Rickster said:
What is the inverter running, list everything.
Click to expand...
Im running a PC and 2 monitors. Around 200-350W draw. I've had the same experience across 6 different setups, using 3 different inverters (albeit all 3 being different FiveStar models), with all of them using the same REVOV 12v 200Ah batteries. The inverter also does not display an error code when briefly switching off and restarting.
 
BasBas said:
I do not see what the EL has to do with this?

My MECER 1200VA with a REVOV battery does the same, very irritating. Not sure if it is the Revov or the inverter.
Will take my multimeter to the revov tonight and see if the voltage does anything funky when i
Click to expand...
I was thinking for long its the inverters, but someone add Brights today told me that they've had lots of reports of the same issue with REVOV batteries. Im thinking on switchover the battery BMS kicks in for some reason to protect the battery, and then resets? I've phoned REVOV as well to ask them about this, they will provide me with feedback later
 
Naks said:
I would start with checking the resistance of your Earth points, and then replacing the Earth Leakage breaker
Click to expand...
This is a plug and play unit, not connected into the mains. The inverter itself is switching off and on, not the house mains
 
marcodekock said:
Im running a PC and 2 monitors. Around 200-350W draw. I've had the same experience across 6 different setups, using 3 different inverters (albeit all 3 being different FiveStar models), with all of them using the same REVOV 12v 200Ah batteries. The inverter also does not display an error code when briefly switching off and restarting.
Click to expand...
Check a setting that talks about APL/UPS, I think it has to do with how the inverter switches, you want to put it on UPS.
 
I'm thinking surge current is resulting in the trip.
300W @ 12v is at least 25Amp running current. Anything that has a coil takes up to 5x the current to start; it could be that as the power-cut happens, the inverter/battery cannot handle the brief 70A+ surge and trips.
 
My inverter was doing something similar a few months ago. Very frustrating. I went through all my cabling diagnosing each item. In the end, it was a cheap extension cord that was causing the DB board to trip the 1 circuit. It was a brand new extension cable, but a cheap one. I unplugged it and since then I have never had another trip again.
 
Put a voltmeter on the battery and watch as the inverter dies, if the voltage drops suddenly it's the battery failing to keep up with the demand, or if it goes to 0 the BMS is shutting down. Either way the issue is with the battery then.

If the voltage jumps up a bit then it's the inverter or something further down the line.
 
LCBXX said:
I'm thinking surge current is resulting in the trip.
300W @ 12v is at least 25Amp running current. Anything that has a coil takes up to 5x the current to start; it could be that as the power-cut happens, the inverter/battery cannot handle the brief 70A+ surge and trips.
Click to expand...
The PC is already running, but still switches off, would that still then surge to that high Amps?
 
Must be the battery. The fact you've tried it with several different inverters all but proves it.

Will need to try with a different brand battery. If it happens with any other LFPs then small possibility it's some kind of lithium compatibility issue?
 
marcodekock said:
The PC is already running, but still switches off, would that still then surge to that high Amps?
Click to expand...
Unless the inverter runs online, meaning it is always "inverting", there will an interruption as it cuts over from mains-feed to battery feed.
 
marcodekock said:
I was thinking for long its the inverters, but someone add Brights today told me that they've had lots of reports of the same issue with REVOV batteries. Im thinking on switchover the battery BMS kicks in for some reason to protect the battery, and then resets? I've phoned REVOV as well to ask them about this, they will provide me with feedback later
Click to expand...
pls get back to us with what they say!
 
LCBXX said:
Unless the inverter runs online, meaning it is always "inverting", there will an interruption as it cuts over from mains-feed to battery feed.
Click to expand...
It is supposed to operate as a UPS as well, which it mostly does but every now and then it fails
 
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