Uff 18kW 300+Amps @Nominal. Copper girders are needed for that.completelycharged said:......................I have only managed to get upto about 18kW out of my pack when trying to trip breakers .........................
completelycharged said:8. Still learning
Oh, in relation to the batter to busbar resistance of 5.08 milli Ohm :
47V battery with short on busbar would be 9250 Amps or... 434kW... and that scares the s**t out of me.
Wolf said:My only experience with such current flow is when I hook up my Inverter. The inrush of current to charge the capacitors has blown many a 200A fuse.
I did replace the fuse with a "cheep" breaker but even that was not enough as I fused the contacts on those also when switching the breaker on to power up the inverter. So it essentially became a fuse and no longer did any of that "breaker" stuff.I now jump the new replacement"cheep" breaker with a substantial jumper to charge the capacitors before turning the breaker on. Kind of defeats the purposewhen trying to turnthe inverter on.
Both these breaker areon the "to replace " list with a proper one that can handle the current inrush without melting.
Wolf said:I for one am going with breakers.
I have investigated this pretty heavily and have come up with the ABB S200 series to be my breaker of choice.
They offer all kinds of trip curves and numerouscurrent protection values,125 VDC bidirectional support, and are reasonably priced esp on eBay.
They also offer a shunt trip attachment, which I will be installing on all my breakers, and putting a RED emergency button in a conspicuous location to do an emergency shutdown tripping all the breakers at once. Anything over 63 Amps will be a ABB Sace S3 also shunt tripped.
A complete system shutdown with fuses ,I feel, is time consuming esp in an emergency.
Correct me if I am reading these ABB specs wrong but I believe they are correct.
Agree but this is for connection of battery to inverter after it's been off, ie system start-up, not normal operation.daromer said:Inrush current limiting should not be needed for appliances for normal homes.
Daromer,daromer said:Wolf it it blows your fuses you have wrong fuses for that inverter. They often should be b or c characteristics.
Inrush current limiting should not be needed for appliances for normal homes.
Also note that with a proper breaker between the inverter and battery you can also minimize the sparks created. Like the ABB series do.