Thread: Battery charger issue

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Charger output is 14.84 at charger
14.81 at breaker

Is this voltage drop ok, 4 ga wire, 10 ft run

Thanks

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You got a whole lot going on that setup. Why not just run two 12v in parallel as opposed two in a series of two 6 volts to create 12v? Biggest problem I see is your trying to charge two separate batteries with a single bank charger. 45 amps is a bit strong to recharge deep cycle batteries, your breaker is only a 50 amp, IMO. A slow charge of 15 amps or less is best and then a maintainer charge for DC batteries. Look for a 6v/12v two bank charger and it may just solve your issues

I know your probably not going to listen to me, but first thing you need to do is remove that breaker and throw it in the trash. It’s nothing more than a choke point in your setup causing resistance which creates heat which has caused it to weaken this now it has broke down to the point it’s going to trip. I can’t remember if you said during your initial post about creating this setup if charger manufacturer required a breaker between charger and battery. But it should not be necessary. Charger should be internally protected. But if you insist on having a breaker you need to install one to handle a minimum of double your output. 80 to 100 in your case. It’s a safety device in case you have a dead short. Which in that case a 100 amp would trip quick as it happened. Get one that has stud’s on it with nuts. Crimp on ends with proper size eyes for those studs. You don’t solder those wires for that type connection.

I do not know about 6 volt batterys in series....but If you had two 12 volt batterys in paralell and a two bank charger with a separate bank going to each deep cycle battery, you would not want to charge over 15 amps per bank. Charging any harder than that deep charging often is going to shorten the life of those batterys. A 50 or 60 amp resetable circuit breaker is required near the battery for the positive lead going to your trolling motor.

Reading the manual for that charger, I fail to understand why they require a breaker when the DC output is clearly protected against over-current by fuses, short-circuit protection, and also "cycle-by-cycle current limiting". I would not use such a breaker, and certainly not one like that, without sturdy terminals, and correct-size lugs properly crimped to the wire, as Cray has mentioned. Actually, in the first place I would never purchase any charger that required such a breaker. The breaker requirement seems to be a misguided CYA requirement from the mfr. (or their lawyers), and does not make technical sense.

Breakers are used, and sized, to protect the wires connected to the battery from over-currents that would exceed their amp capacity and cause a fire hazard. Not as some sort of band-aid to protect a power supply.

Why use 2 6V batteries in series to get 12V anyway? It is not a good idea IMO to use a 12V charger to charge 2 series connected 6V batteries. I suppose you have your reasons, but I don't know what they might be. SMH

Your breaker is probably bad they get weaker the more often they trip.Try a bigger and better quality breaker, charging two six volts in series with a single 12volt charger shouldn't be a problem, lots of farm and heavy equiment ran battery's in series in the 50s-80s and charged them with a single generator or alternator.

Set up is normal except for the breaker. Remove it completely. It will eliminate the issue without affecting the charger setup, the charger unless antique has built-in circuit protection

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I agree - remove the breaker, and go from there.