Redarc 40 amp DC to DC Charger issue
After about 15 seconds or so when I start the engine my shunt reads up to almost 49 amps and then the 60 amp input breaker pops. Whats going on here? Isn't the charger supposed to limit the output current to 40A?
Forum Discussion
- Something sounds off, I have the 50amp Redarc and it draws exactly 50amps from the alternator/truck battery and output is about 47amps to the batteries.
KD4UPL wrote:
What voltages? Where are you measuring current; on the input or output? If you are charging to 14.7 volts at 40 amps but only receiving alternator power then it would take 14.7 x 40 / 13.8 = 42.6 amps input not accounting for the converter efficiency.
Check voltage at the vehicle battery and at the house battery (before the trip).- Any time there is a current question check/clean all connections !
LittleBill wrote:
Teleman wrote:
After about 15 seconds or so when I start the engine my shunt reads up to almost 49 amps and then the 60 amp input breaker pops. Whats going on here? Isn't the charger supposed to limit the output current to 40A?
what side are you reading on? its 40a on output, breaker shouldn't be tripping at 50 amps either.
Looking at the house battery shunt. Seems to have stabilized at about 43 amps. Breaker trips at about two minutes making me think it's a **** breaker. I'll check with a clamp on ammeter tonight.Teleman wrote:
After about 15 seconds or so when I start the engine my shunt reads up to almost 49 amps and then the 60 amp input breaker pops. Whats going on here? Isn't the charger supposed to limit the output current to 40A?
what side are you reading on? its 40a on output, breaker shouldn't be tripping at 50 amps either.- What voltages? Where are you measuring current; on the input or output? If you are charging to 14.7 volts at 40 amps but only receiving alternator power then it would take 14.7 x 40 / 13.8 = 42.6 amps input not accounting for the converter efficiency.
- Might be normal, If your Redarc is anything like my Victron 18amp which has no current regulation. Me I'm very disappointed in the Victron DC to DC chargers they offer no way to adjust the output current. Check out their web site forum and the many many complaints regarding this issue. Even worse my Isolated 18A max DC to DC charger, charges my 200amp/hr Li battery at 26amps! WTF! Had to return the 40amp version it went to as much as 70amps with no way to adjust the current.
Horsedoc wrote:
dead short?
I don't see how. It would trip immediately.- dead short?
