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Author Topic: 72v charger, potential uses?  (Read 1307 times)
fourfootfarm
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« on: February 03, 2017, 03:15:28 PM »

I have a 72v forklift charger thats just been sat stored for quite a while now. It came with my forklift (which sadly I couldn't transport and had to scrap) but using a 24v set up.

Its a big dumb one with  massive transformer and very little else. The transformer has various taps on both input and out put but from what I can see only in the 70v and 220-240v range
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Outback FM60. EPsolar 30a MPPT and a bunch of Tristar 45's. Hodge Podge of solar ~ 4500w. Various generators and 1000ah 24v forklift battery.

Turkish Turnip
biff
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« Reply #1 on: February 03, 2017, 04:08:50 PM »

Ah FFF,
        My heart goes out to you. Like me, you thought that there would be a rush of buyers for the goodies inside but alas,,Mine still sits in the same spot and has not moved for a good 8 years but it shares space with two friends. two 48 volt chargers. There have been times that I wanted to advertise these babies and perhaps get a few bob for them but the thinking was originally to transplant a few more bits out of the 48v charger into the 72v creating a mother of all 120volt chargers...l...It never happened,,I had nervous visions and visitations of very high powered black smoke, Great welding sparks and me in the middle, getting tanned and overheated, so for once,,wisdom surfaced and it never happened. But occasionally people do ask what I am doing with the 3 forklift chargers and I get stuck for words, Imagine that. and now, i will never need them.
               Biff
 
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An unpaid Navitron volunteer,who has been living off-grid,powered by wind and solar,each year better than the last one.
fourfootfarm
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« Reply #2 on: February 03, 2017, 04:36:57 PM »

If you fancy this one then imagine the power! 240v of DC goodness.

Hopefully someone with a 72v EV will find a use for it.
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Outback FM60. EPsolar 30a MPPT and a bunch of Tristar 45's. Hodge Podge of solar ~ 4500w. Various generators and 1000ah 24v forklift battery.

Turkish Turnip
biff
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« Reply #3 on: February 03, 2017, 05:02:39 PM »

Ah   Good plan,
           I had a similar plan and bought a dinky 72volt ev,, then I needed a massive generator to drive the 72v charger banghead
                  It was something that was not part of my original calculations but made itself known in due time.
                                                           Biff
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An unpaid Navitron volunteer,who has been living off-grid,powered by wind and solar,each year better than the last one.
eabadger
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« Reply #4 on: February 03, 2017, 05:30:53 PM »

run the outputs in series, remember it will be limited to the power of the lowest, but 2x 72v would give you a decent 144v charge.
but i always found these very inefficient
i had a 24v 110a one that needed 21a at mains to run, my victron gives me 24v 70a at about 8a mains.

what is copper worth nowadays?
i have a big 10kva genset head to weigh in, another sad story.

steve
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1600w PV main array at 24v, excide 2v 1000a forklift cells now x 2, 320w PV secondary array at 12v. Enfield 1944 ex RAF 5.6kw diesel genset (now in pieces, big ends gone), Petter AC1 28v diesel charging set at 2.8kw.
1kw wind turbine.
26kw wood stove back boiler to underfloor heating and dhw
eabadger
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« Reply #5 on: February 03, 2017, 05:48:20 PM »

bif, this would be ideal for your monster battery?
http://www.ebay.co.uk/itm/Sissons-Stationary-steam-engine-dc-generator-/132074965105?hash=item1ec0480871:g:TAAAAOSwxg5X1w9D
who wouldnt want this

steve
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1600w PV main array at 24v, excide 2v 1000a forklift cells now x 2, 320w PV secondary array at 12v. Enfield 1944 ex RAF 5.6kw diesel genset (now in pieces, big ends gone), Petter AC1 28v diesel charging set at 2.8kw.
1kw wind turbine.
26kw wood stove back boiler to underfloor heating and dhw
fourfootfarm
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« Reply #6 on: February 03, 2017, 08:20:01 PM »

Monster generator we have thankfully. But if I can get my inverters to charge properly hopefully won't need an external charger at all.

with powerjack thats a BIG if.

Should flog them and bump up to 48v like a sensible person.
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Outback FM60. EPsolar 30a MPPT and a bunch of Tristar 45's. Hodge Podge of solar ~ 4500w. Various generators and 1000ah 24v forklift battery.

Turkish Turnip
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