Author Topic: Where do you set your WbJr end amps for FLA?  (Read 418 times)

Syonyk

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Where do you set your WbJr end amps for FLA?
« on: February 07, 2018, 04:00:42 PM »
I know the datasheets typically say "1-3% of C/20 rate" for charge termination, but that's an awfully wide range.

For a 225Ah bank, that's 2.25A-6.75A, which is quite a wide range for termination.  Especially since, given enough charging, it can get down to the 1% area.

I've had it set around 1% for the winter, which it can get to (sometimes not after a long week of PSOC cycling), but I'm thinking that pushing it up to 1.5% or 2% in the summer, when the pack charges fully every day, would be sane.

Thoughts?  My goal is longevity on the bank, more than cramming every last amp-hour in, but they're flooded, so they take the overcharge decently.

Westbranch

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Re: Where do you set your WbJr end amps for FLA?
« Reply #1 on: February 07, 2018, 07:19:36 PM »
Tell us more about the whole system and how it is configured... brands, capacity etc
KID FW1811 560W >C&D 24V 900Ah AGM
CL150 29032 FW V.2126-NW2097-GP2133 175A E-Panel WBjr, 3Px4s 140W > 24V 900Ah AGM,
2 Cisco WRT54GL i/c DD-WRT Rtr, NetGr DS104Hub
Cotek ST1500 Inv  want a 24V  ROSIE Inverter
OmniCharge3024  Eu1/2/3000iGens
West Chilcotin 1680+W to come

ClassicCrazy

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Re: Where do you set your WbJr end amps for FLA?
« Reply #2 on: February 07, 2018, 07:20:06 PM »
There are a lot of past detailed discussions about this topic in the forums.

Basically you need to spend some time analyzing your batteries by watching the point where the amps start to level off , in conjunction with the SOC reaching 100 % , and verifying by taking specific gravity readings . Then you will know what the exact ending amps point should be .

Larry
system one
Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system two
Classic 150 ,5s 135 watt Kyocero , 16s Calb 100AH LiFePO4 , Outback VFX 3648 inverter
system three
Midnite KID MPPT 24 DC in to  12 volt AGM batterie

Syonyk

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Re: Where do you set your WbJr end amps for FLA?
« Reply #3 on: February 07, 2018, 09:13:44 PM »
Tell us more about the whole system and how it is configured... brands, capacity etc

8x Trojan T105-REs in series, for a 48V/225Ah bank.

Midnite Classic with 2280W of panel hung, WbJr for current sensing.

Plus another 570W of east facing panel on a PWM controller - helpful for getting the recovery going early in the morning.

I'm definitely on the overpaneled side of things, and am usually into absorb by around 1100-1130 (sometimes earlier).

There are a lot of past detailed discussions about this topic in the forums.

Ok, I'll dig around a bit.  Any good threads you happen to recall?

Quote
Basically you need to spend some time analyzing your batteries by watching the point where the amps start to level off , in conjunction with the SOC reaching 100 % , and verifying by taking specific gravity readings . Then you will know what the exact ending amps point should be .

Would this be the point where, if you leave it at the absorb voltage, the charge current levels off?  I've got charts on that, and 1% seems about right.  I'll check this against SG here in the next few days.

ClassicCrazy

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Re: Where do you set your WbJr end amps for FLA?
« Reply #4 on: February 07, 2018, 10:28:34 PM »
you have to go to the first forum page ( where all the topic are listed )   and then search for Ending Amps 
or search set ending amps

If you see comments from Vic  - read those - he knows his stuff !
Westbranch too

Larry
system one
Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system two
Classic 150 ,5s 135 watt Kyocero , 16s Calb 100AH LiFePO4 , Outback VFX 3648 inverter
system three
Midnite KID MPPT 24 DC in to  12 volt AGM batterie