1000 watt Yamaha generator?
I had an Alpenlite fifth wheel and got a Yamaha 1000 watt inverter generator when I needed a new convertor, I put in a 45 amp convertor thinking that it would be handled nicely in the rare instance wh...
Forum Discussion
MEXICOWANDERER wrote:
Will your Parallax stay in float mode while supplying 30 amps of float? Every 30-days it would be appropriate to zap flooded batteries with 15 minutes of 15.0.
My 7345 has one "mode" - from it's fixed voltage output circuit that can supposedly supply up to 45 amps if it's output circuit's resistance in parallel with the battery's intrinsic resistance allow the 7345's output voltage to stay in a range around 13.8 volts.
When a battery's internal resistance at whatever SOC it's at - in parallel with the 7345's output resistance - is so low that at that SOC the 7345 can't delivery enough current to force it's output voltage up to around 13.8 volts, then my 7345 sits there at way less than 13.8 volts output delivering to my batteries way less than 45 amps because at way less than 13.8 volts on their terminals the batteries won't accept anywhere near 45 amps anyway.
It would take a considerable larger amperage capacity power supply than a 7345 to maintain 13.8 volts or higher on it's output terminals when starting out to charge my 230 AH AGM RV battery bank at 50% SOC.
Reading between the lines above, what you're basically doing when charging RV batteries can be kindof like "chasing one's tail" whenever using a charger that is really too small in capacity when starting out to charge the batteries. This is especially the case with AGM batteries due to their naturally low internal resistance.
Just as an aside due to our camping style, my RV's 130 amp engine alternator does hit the batteries with 14.XX volts and high enough currents often enough to (hopefully) keep them healthy in spite of the 7345's long-and-slow-only capability.
Actually, the method of manually adjusting the output voltage of a high current capacity charger so as to force all of the current into the batteries that they will accept at that voltage throughout the charging process is probably the ultimate way to charge lead acid batteries. However, it can take money, time, and a battery-nerd mentality to charge this way.
