[RE-wrenches] generator charging question/VFX3524

[John Blittersdorf]

Chris, I am doing just what you are contemplating.  I have a 6000 watt
Briggs & Stratton Gasoline worksite generator and had the same issue
charging my Fortress Eflex batteries.  I was getting 25 amps off one leg
but the genny wasn't happy about it.  I ran another line off of leg 2
directly to an Iota DLS 54-13 and now I get almost 40 amps and the
generator runs more smoothly. The only problem with the older outback
inverter is that the low battery cutout will only go up to 48 V when it
should be closer to 50 or more. As long as the customer keeps an eye on the
voltage or the generator has AGS, there is  no problem  If the batteries do
shut themselves down, the Iota charger can boot them back to life ... a
good reason to have the second non generator charger. I have considered
hooking up a second IOTA charger to see if I can get 50 amps out of my
generator without it working too hard.
I

John Blittersdorf

NABCEP Certified Solar PV Installer™



CV Wind Service (and solar)

200 West Road

N Chittenden, VT 05763

802-770-8625

www.offgridvermont.com


On Wed, Feb 7, 2024 at 3:56 PM Chris Daum via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi folks:
>
>
>
> So, we have a customer (equipment not acquired from us)  with an older
> OUTBACK VFX3524, charging their 3 X RB24V200 ReLion LFP batteries vis a
> vis one leg of their generator.  The battery is capable of up to 200A
> recharge though the manufacturer recommends 10~100A.  The customer has a
> 240VAC generator with two 120VAC legs; customer wants to bump up the
> charging to over 22.5A, preferably more; they’re running their gennie a
> lot to get a rather slow rate of charge from the inverter’s charger.
> Presently the customer has the Inverter/charger connected through the
> FLEXware 250 enclosure. There is not a busbar in place.  The idea
> presented is to use an external battery charger that would pull from the
> other leg of the 240VAC gen set to supplement the charging capability.   The
> question becomes: can we use a busbar with disparate amps charging to bump
> up the charging rate for the LiFePo4 battery?  Outback techs are saying
> the VFX3524 is not LiFePo4 compatible, but they also say they need to stack
> another inverter. I think we are looking at letting the smoke out of the
> least-producing charger by pushing amperages back.   What do y’all think?
> Any and all ideas are under consideration.
>
>
>
> Best,
>
>
>
> Chris Daum
>
> Oasis Montana Inc.
>
> 406-777-4309 or 4321
>
> 406-777-4309 fax
>
> www.oasismontana.com
>
>
>
>
>
>
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