charger sizing

Jeromeds
Jeromeds Registered Users Posts: 13 ✭
in Solar Beginners Corner #1
How does one determine size of multi stage charge is needed. I am looking at IOTA 45 amp and 55 amp for a small system 340 PV watts, (4) T105's in 12 volt with Sunforce 2500 watt inverter tri star 45 controller. Trying to upgrade to proper equipment to save batteries.
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  • Cariboocoot
    Cariboocoot Banned Posts: 17,615 ✭✭✭
    #2
    Re: charger sizing

    It's based on your batteries' total Amp hour capacity. In this case four T105's in a 12 Volt configuration is 450 Amp hours. Trojan recommends a peak charge current of 10% of that: 45 Amps.

    Good choice! :D
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  • Jeromeds
    Jeromeds Registered Users Posts: 13 ✭
    #3
    Re: charger sizing

    So if I moved up to a pair of L16's @ 420ah does that mean I need a charger that exceeds 80 amps?
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  • Cariboocoot
    Cariboocoot Banned Posts: 17,615 ✭✭✭
    #4
    Re: charger sizing
    Jeromeds wrote: »
    So if I moved up to a pair of L16's @ 420ah does that mean I need a charger that exceeds 80 amps?

    A pair of those L16's would be 12 Volts @ 420 Amp hours. If you changed out the four T105's to four L16's of 420 you'd have 12 Volts @ 840 Amp hours.

    Nice thing about the Iota chargers; you can "stack" them. If you were to go with that big of a battery bank you could buy a second 45 Amp Iota and be good. :D
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  • Jeromeds
    Jeromeds Registered Users Posts: 13 ✭
    #5
    Re: charger sizing

    Oh Sweet. Thank you!
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