FM 60, Li and chargers

Discussion about the MX60 Charge Controller

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2oldman
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FM 60, Li and chargers

Post by 2oldman » Tue Feb 28, 2017 1:43 pm

I'm running a 48vdc system in my RV. Getting ready to dump the 8 very heavy AGM batteries for one 100ah 48v Lithium pack from Relion battery. Some questions:

a) Relion says the charging voltage for this pack is 55v. Can I dial down the Absorb voltage on the FM 60 to that number and the controller will bulk charge at that voltage?
b) Can I hook up any battery charger to the input of the FM60 and it will not care whether that's from a solar panel or a charger, and it will charge this battery pack?

thanks

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Thu Mar 02, 2017 7:40 am

nobody?

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Sat Mar 04, 2017 11:50 am

is it always this dead here?

blackswan555
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Re: FM 60, Li and chargers

Post by blackswan555 » Sat Mar 04, 2017 1:02 pm

http://shop.relionbattery.com/collectio ... /48v-100ah This battery ?

if so, It says on it "charge voltage 58.4" ? But in answer to your original question, yes you could dial it down to 55v if indeed that is the case ?

B,,,,,, You could do, You would need a charger of about 65 volts & I am not sure how well it would play with the cc, Be better off getting an outback inverter & having best of both worlds, good inverter & built in charger,

Tim
My comments are based on my experience and research, They are not endorsed or checked by Outback.I am an independent British electrician living in Spain, So please take this into account when reading /acting on my post`s.

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Sat Mar 04, 2017 2:08 pm

I believe I've been looking at the H battery, which is 55v. I dialed down the Outback 60 and that worked fine

Replacing the inverter is not in my plan this time...although your products are very tempting! According to my Outback owner's manual I'll need a DC input of at least 2 volts higher than the charging voltage.

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Mon May 29, 2017 10:31 am

Update:

I have the Relion 48v pack, with a charging voltage of 58.4 and Absorb of 55.2. During my first 3 days of testing, I don't think it's going well. Perhaps I don't understand how to do this.

I set the Absorb to the recommended voltage, but the Outback took almost all day just to reach that voltage. And the battery wasn't discharged very much. I have a landline charger set for those voltages and it works great. The voltage climbs to Bulk, the amperage tapers off, then it goes to Absorb. With the FM60 I never saw the voltage rise above Absorb.

Do I need my Fm60 reprogrammed?

EMCF
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Re: FM 60, Li and chargers

Post by EMCF » Tue May 30, 2017 11:19 am

Nothing in any FM60/80 literature says these charge controllers can handle lithium ion battery charging.
Outback Fanboy at your service

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Tue May 30, 2017 12:32 pm

I know. I just wish I knew what 'handling' an LI battery meant.

"Everyone" I talk to raves about how solar is so wonderful for Li. Yet my landline acid battery charger had to be modified to do that. Hopefully someone from Outback will respond and give me the truth.

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Re: FM 60, Li and chargers

Post by SandyP » Tue May 30, 2017 9:40 pm

EMCF wrote:Nothing in any FM60/80 literature says these charge controllers can handle lithium ion battery charging.
Some people have used the FM charge controllers with lithium with no issues : http://forums.energymatters.com.au/sola ... M80#p50334

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Wed May 31, 2017 9:26 am

I think those are prismatic cells.

blackswan555
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Re: FM 60, Li and chargers

Post by blackswan555 » Wed May 31, 2017 10:19 pm

set the Absorb to the recommended voltage, but the Outback took almost all day just to reach that voltage. And the battery wasn't discharged very much. I have a landline charger set for those voltages and it works great. The voltage climbs to Bulk, the amperage tapers off, then it goes to Absorb. With the FM60 I never saw the voltage rise above Absorb.
I think you may have your wording wrong which makes it a little confusing, Bulk and absorb are the same voltage, Bulk is the time it takes to get to that voltage, Absorb is the time it is held there, I believe when you say
with a charging voltage of 58.4 and Absorb of 55.2
you/they actually mean a bulk/absorb of 58.4 and a FLOAT of 55.2,
The reason the FM did not get there would probably be lack of input that day? What sort of currents do you see ? I would try an early morning charge with grid untill you get good Sun then switch grid off and let solar finish, I do not know those batteries, but some do need "enough" amps to get them through bulk in a reasonable time,

Tim
My comments are based on my experience and research, They are not endorsed or checked by Outback.I am an independent British electrician living in Spain, So please take this into account when reading /acting on my post`s.

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Thu Jun 01, 2017 10:09 am

Thanks.. yes I did have the terms wrong. Voltage rises to meet the Absorb value. Then drops to float. I think I have it figured out now.

I think where I got confused was reading about Progressive Industries Li shore chargers saying they're "constant voltage."

MCR
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Re: FM 60, Li and chargers

Post by MCR » Sun Jun 04, 2017 9:49 am

Hey there, I run a system with 700 amp hour Winston Batteries, 48 volt. The link below has a ton of info on Lithium Ion batts, and just a ton of advise that may prove useful, but it is a long read, and several articles are on his site. Good luck- we love our Lith batt pack, been ultra reliable, deep capacity- run 2 full time cabins and a part-time house and 2 workshops off our system and the genset only rarely comes on, and only in winter.
https://marinehowto.com/lifepo4-batteries-on-boats/

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Sun Jun 04, 2017 12:31 pm

An Outback engineer told me to set Float and Absorb the same. That makes no sense.

blackswan555
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Re: FM 60, Li and chargers

Post by blackswan555 » Sun Jun 04, 2017 8:39 pm

An Outback engineer told me to set Float and Absorb the same. That makes no sense.
It does in some situations,Some modern batteries eg li whatever have their own internal battery monitor/ charge systems, (Otherwise they blow up :grin: ) They "like" a constant voltage, On an off grid system with barely enough panels that is cycled daily, I would not use float either ( Solar, Floating from a generator is total waste of fuel)

Tim
My comments are based on my experience and research, They are not endorsed or checked by Outback.I am an independent British electrician living in Spain, So please take this into account when reading /acting on my post`s.

2oldman
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Re: FM 60, Li and chargers

Post by 2oldman » Mon Jun 05, 2017 7:23 am

If my Li pack says charge at 58.4 and float at 55.2, why would I set my float to absorb?

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