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Hi I just want to check something out with everyone.
When my system is fully switched off (ie for system physical changes). And I come to do the turn on, I always get arc flash when pushing in the fuses on the positive side of the inverters.
Is this normal or should I be concerned with this?
Is there anyway to avoid this?
Hi @h2009
It's normal. The Quattros filling large capacitors.
A 48V spark can be a nasty one though, can damage metals, even stainless threads. The current can overload Li batt bms's, etc.
You could use a precharge circuit with a resistor to dodge the spark, either permanently wired in or a 'jumper lead' sort of thing. Depends how often you want to do this.
You could google 'precharge circuit' to see what others do, even makers of 'prechargers'.
Thanks for the reply. I was expecting this, it’s ashame there isn’t a VE solution for this or away to avoid it if the shutdown is done in a particular method. As long as it doesn’t damage the inverters that’s my main concern.
Battery overload isn’t my concern as I’ve got plenty of banks.
With lithium it is connected everything then switch on.
I've got 16x PylonTech US5000
This is my startup process - do you see issues with this?
1. Insert battery circuit breakers between batteries and lynx power in
2. Switch on batteries as per pylon tech manual
3. Check cerbo is flashing, Log onto GX console > Device List > Pylon Tech Batteries > Details 4. Check that all batteries are present then GX console > Device List > notifications ‘No Alarms’ 5. Insert Battery Circuit Breaker between Multi Plus II’s and Lynx Distributor
6. Turn on the Multi’s Plus II one by one ‘order’ L1, L2, L3
7. Check no alarms GX console > Device List > notifications ‘No Alarms’
8. Turn on AC MIB
9. Check no alarms GX console > Device List > notifications ‘No Alarms’
10. Turn on AC MOB ‘Check that the house is powered’
