Charging Batteries ONLY with solar

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Charging Batteries ONLY with solar

Postby victorjesus on Sat Mar 31, 2018 8:33 pm

I just installed a solar system. It consist of a Radian 8048, Mate 3s, Two Flexmax 80 and 12 energycell 200NC. My array is a 6.825 KW. It is a Grid Tie system. I noticed that when the battery voltage is low during the night, the system automatically use the grid to charge the batteries. Can it be possible to program the charge controllers to only use solar to charge my batteries?
victorjesus
Forum Junior Member
 
Posts: 4
Joined: Sat Mar 31, 2018 8:02 pm
My RE system: 6.85KW system consisting of:

21 GCL 320w panels
2 Midnite Combiner boxes
1Radian 8048
Mate 3s
2 Flexmax 80 Charge Controllers
12 Energycell 200NC with battery bank
FNDC and HUB

Re: Charging Batteries ONLY with solar

Postby Kurt Lundquist on Mon Apr 02, 2018 9:27 am

You can press the Charger button then press OFF to turn off the inverter's charging ability. How low do your batteries drop at night?

I think the default "refloat" voltage is 50V. This means that when the batteries reach 50V the inverter will run a float charge cycle. Is this what you are seeing?

Thanks,

-Kurt
Kurt Lundquist
Alpha Energy Systems Engineer
http://www.alpha.com/solar
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Kurt Lundquist
Alpha Energy Engineering
 
Posts: 865
Joined: Tue May 31, 2011 7:23 am
Location: Arlington, WA
My RE system: VFX3524, Mate3, 200Ah 24V AGM Battery Bank

Re: Charging Batteries ONLY with solar

Postby victorjesus on Mon Apr 02, 2018 7:17 pm

Thanks Kurt.

Batteries are set to re-float at 50v. Right now I'm using the mini grid mode awaiting for the net metering. I'm only using 4 batteries but 8 more are on the way. I should have no problem with the full bank. I just don't want to use the grid, or use it the less possible.
victorjesus
Forum Junior Member
 
Posts: 4
Joined: Sat Mar 31, 2018 8:02 pm
My RE system: 6.85KW system consisting of:

21 GCL 320w panels
2 Midnite Combiner boxes
1Radian 8048
Mate 3s
2 Flexmax 80 Charge Controllers
12 Energycell 200NC with battery bank
FNDC and HUB


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