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Slownsy's avatar
Slownsy
Explorer
May 28, 2018

Battery charging

We have 4 6V Deep Cycle flooded 260A so 520A at 12v. If they are discharged to say 60% what is the most A I can charge them with ? they have got temperature proper on them. My Magnum hybrid inverter can charge at op to 125A I believe. The Progressive charger is 45A. My Honda EUI 3000 generates was stolen and are debating about replacing with the Honda Eui 2200. Rather than the 3000. We have installed the soft start to our air conditioner.
Frank.

25 Replies

  • The Honda 2200 will put 80 to 100 amps into that battery through the Magnum as I believe it is power factor corrected.
  • Trojan T145s? Trojan says 10 to 13% See Page 17 http://www.trojanbattery.com/pdf/TrojanBattery_UsersGuide.pdf
  • Usually its about 30% of the c/20 rate. What make batteries do you have?

    520ah @ 30% = 156amp

    edit....BFL beat me to it!!!;)
  • Slownsy wrote:
    We have 4 6V Deep Cycle flooded 260A so 520A at 12v. If they are discharged to say 60% what is the most A I can charge them with ? they have got temperature proper on them. My Magnum hybrid inverter can charge at op to 125A I believe. The Progressive charger is 45A. My Honda EUI 3000 generates was stolen and are debating about replacing with the Honda Eui 2200. Rather than the 3000. We have installed the soft start to our air conditioner.
    Frank.


    You can go higher, but about 30% charging rate is the highest it is worth going to for generator time consideration. 25% is almost as good for time doing a 50-90. So looking at 156 amps or perhaps 130 amps.

    Your generator supplies VA and that means you can run more amps if the charger is PF corrected instead of the usual 0.7 PF. ISTR the Magnum is PF corrected. The PD is not.

    I have been running 50-90s with my four battery bank using a 100 amp PF corrected charger along with a 55 amp non-PF charger, which maxes out my Honda 3000 for VA.

    Your real question is whether you can run the Magnum 125 on the 2200 Honda, and whether that will give you a short enough generator run time to do your 50-90 (60-90 in the OP scenario.)

    ISTR the Magnum has an adjustable input which reduces the DC output, so you could run the Magnum with the 2200, but I don't know what the DC output would be.

    Forget about running the PD in addition unless you have a 3000 or two of those 2200s in parallel.

    If you need more info on comparative times to do a 50-90 b y charging rates on that size of battery bank, I have an "ugly graph" I can inflict on the forum, but you may have seen that a few times already :)
  • Well, assuming you have quality lugs and thick cabling, they would probably easily take 100 amps or more at that level of discharge. In fact they might even draw the max charge current of 125 amps from the your inverter-charger briefly.

    I have two 6v batteries with #4awg wiring that is short in length. When I have discharged them to about 60 percent they will draw the max Prog dynamics converter output of 45 amps easily. I charge them with a honda eu2000i. That honda generator could probably run a PD 60 amp converter at full output no problem.

    I don't know the specs of your inverter charger, but chances are it could overload the honda 2000 when batteries are discharged that far. However, there might be some settings on your inverter-charger that could prevent that. The only way to know is to try it out.

    if your inverter-charger is this model 'MSH3012', there may be a way to program the settings to limit max shore power amps to a level the honda can provide continuously (under 15A AC).

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