NPP batteries

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mendocino_beano
mendocino_beano Registered Users Posts: 5 ✭✭
in Off Grid Solar & Battery Systems #1
Does anyone have experience with NPP batteries? They seem well certified and a few pounds heavier than most of the Chinese rebrands. Come with a two year warranty as well. 
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,439 admin
    #2
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    Are these the batteries?

    http://nppbatteries.com/index.php?route=product/category&path=59

    I am not sure--Some (at least, if not all) are GEL batteries which tend to not be great for off grid solar use... Typically we want to charge a daily use off grid power system at 10% to 13%+ current (100 AH battery * 10% rate of charge = 10 amp charging current).

    GEL batteries typically want 5% or a bit less maximum or charging current. High charging current can damage them. Their GEL batteries are designed for float operation (UPS/Emergency backup power).

    Even the "deep cycle" batteries are recommended for shallow cycling. Their deep cycle rating is not that great.

    If this was a weekend cabin or RV, they will probably be OK (not that many cycles a year--Just vacation or weekend use).

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • mendocino_beano
    mendocino_beano Registered Users Posts: 5 ✭✭
    #3
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    This was my concern as well. Although they do offer many non-gel, the fact that they are sold as suitable for UPS, Telecom, solar, wheelchair, paperweights, etc leads me to believe they are not true deep cycle. A quick glance at the data sheet shows they are rated to about 1300 cycles at 30% DOD. The 200ah "deep cycle" agms are rated to .3C (60a max) so yah not great I guess. The plus side is I could probably burn through them before the two year warranty is up 😋
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  • Dave Angelini
    Dave Angelini Solar Expert Posts: 6,746 ✭✭✭✭✭✭
    edited May 2019 #4
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    Have you priced Concord?  My brother had them in the plane on the left side of this web-page. Made in California.

    http://concordebattery.com/
    "we go where power lines don't" Sierra Nevada mountain area
       htps://offgridsolar1.com/
    E-mail offgridsolar@sti.net

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