My Outback Power New System

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My Outback Power New System

Postby jec07131 on Sat Sep 15, 2018 12:55 pm

Hi Guys I present my FP2 2-3048A,2-FM80-720A/H @48V,5.3KW PV Array
solar.jpg
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jec07131
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Posts: 15
Joined: Sun Sep 02, 2018 4:59 am
My RE system: FLEXpower TWO FXR
2-FLEXmax 80
Dual FXR3048A, 6.0kW FLEXpower
MATE3s
HUB10.3
FLEXnet DC
FLEXware surge protector
12-320w canadian
720AH@48v

Re: My Outback Power New System

Postby JeffinthePeace on Sun Jan 20, 2019 10:16 pm

It’s a beauty!
If I could do things all over again, I would have tried to find more time to understand the system, and possible future potential expansion, before it was installed.
As it was, a few things were installed incorrectly...agh, whaddaya do. Live and learn.
Treat your battery well. New cells hide a lot of sin, for a while...then abuse or neglect show over time.
Enjoy
J
JeffinthePeace
Forum Expert
 
Posts: 74
Joined: Mon Oct 01, 2018 8:20 pm
Location: Peace Country, British Columbia
My RE system: PSX-240 Auto Transformer.
VFX3524 Inverter/Charger.
FM80 Charge Controller.

6 (total) Trina PV panels: 365W, 39.3Vmp, 48.0Voc, 9.3A Imp, 9.77A Isc
—> PV set up in 3 pairs. Each pair in series.
Midnight Sun Combiner Box.

Mate (Original) and Hub4.
TriMetric 2020 Battery Monitor.

2 battery banks, each:
1065 Ah Yuasa 85T-21 FLA battery bank (10 yrs old).
—> Battery set up in 6 boxes x 4V cells each = 24V system.
—> Bank 1 = 1065 Ah
—> Bank 2 = 1065 Ah
—> Bank 1 & Bank 2 connected via Blue Sea 4-Position Battery Selector Switch.

10kW 120/240VAC Kubota/Stamford diesel generator.

No Utility Grid available.

Re: My Outback Power New System

Postby raysun on Sun Jan 20, 2019 11:03 pm

Nice!

What type of battery is being used?
raysun
Forum Guru
 
Posts: 320
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower One: FX3048T, MX80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 4Sx3P)

Re: My Outback Power New System

Postby jec0713 on Mon Jan 21, 2019 2:20 am

16 relion R4000 6v AGM + 4 AGM 12v 225a/h
jec0713
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Posts: 12
Joined: Mon Apr 30, 2018 6:08 pm

Re: My Outback Power New System

Postby raysun on Mon Jan 21, 2019 2:53 am

Are all the batteries wired as a single bank?
raysun
Forum Guru
 
Posts: 320
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower One: FX3048T, MX80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 4Sx3P)

Re: My Outback Power New System

Postby jec0713 on Mon Jan 21, 2019 3:01 am

3 string 48v serial/pararell
jec0713
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Posts: 12
Joined: Mon Apr 30, 2018 6:08 pm

Re: My Outback Power New System

Postby raysun on Mon Jan 21, 2019 4:01 am

In order to maximize battery life, it is recommended that no more than three parallel strings of batteries be wired into a battery bank, and that all individual batteries in the bank be identical in specifications and age. The 16 Relion 4000 batteries meet the latter requirement. The 4 12V 225AH batteries do not match the specifications of the Relion batteries.

Having mismatched batteries in the bank will cause issues during charging and discharging.

During charging, the battery chargers see the whole bank, not the individual batteries that make it up. Since the batteries in the bank are of two different physical makeups, when one battery type is fully charged, the other may be either over charged, or under charged.

During discharge, the individual battery types will discharge at different rates, depleting the cells of one type faster than the other type.

Both of these imbalances will lead to substantially shortened battery life. AGM/VRLA batteries are especially prone to early death by imbalance in the charge/discharge cycles.
raysun
Forum Guru
 
Posts: 320
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower One: FX3048T, MX80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 4Sx3P)

Re: My Outback Power New System

Postby JeffinthePeace on Mon Jan 21, 2019 7:16 am

I agree, best not to keep different cells together.
One cost-effective option might be to divide the batteries into two banks:
Bank 1: 16 x 6V wired series/parallel -> 48V
Bank 2: 4 x 12V wired series -> 48V
Connect to system using 4-position battery selector switch.
It means you have to ‘manage’ two banks - use one bank for a period while maintaining the other, then switch - but at least you’d get full life out of each bank (and all individual cells) over time.
Or sell one bank.
JeffinthePeace
Forum Expert
 
Posts: 74
Joined: Mon Oct 01, 2018 8:20 pm
Location: Peace Country, British Columbia
My RE system: PSX-240 Auto Transformer.
VFX3524 Inverter/Charger.
FM80 Charge Controller.

6 (total) Trina PV panels: 365W, 39.3Vmp, 48.0Voc, 9.3A Imp, 9.77A Isc
—> PV set up in 3 pairs. Each pair in series.
Midnight Sun Combiner Box.

Mate (Original) and Hub4.
TriMetric 2020 Battery Monitor.

2 battery banks, each:
1065 Ah Yuasa 85T-21 FLA battery bank (10 yrs old).
—> Battery set up in 6 boxes x 4V cells each = 24V system.
—> Bank 1 = 1065 Ah
—> Bank 2 = 1065 Ah
—> Bank 1 & Bank 2 connected via Blue Sea 4-Position Battery Selector Switch.

10kW 120/240VAC Kubota/Stamford diesel generator.

No Utility Grid available.

Re: My Outback Power New System

Postby raysun on Mon Jan 21, 2019 11:57 am

The great thing about sealed lead-acid batteries is you don't have to do much to maintain them. The bad thing about sealed lead-acid batteries is you can't do much to maintain them.

The best maintenance practices are:
•Don't over discharge the battery. 50% discharge is the practical maximum, and even that substantially shortens cycle life.
•Don't over charge the battery. The charging process releases hydrogen gas from the electrolyte. In a proper charge cycle, the hydrogen and oxygen gasses are recombined by catalytic action. Overcharging will "swamp" the catalyst, resulting in loss of electrolyte as the gasses vent from the battery.
•Don't chronically undercharge them. This can lead to sulphate buildup on the plates, resulting in capacity loss.

Since VRLA/AGM batteries cannot have water replenished like flooded lead-acid batteries, careful external measures must be taken to assure battery health.

First and foremost assure that every cell in the battery is charged and discharged equally. This is the reason the battery must be comprised of identical cells. The internal chemistry, and electrical characteristics of the cells must be kept within tight tolerances. The 16 Relion batteries in two strings fit this scenario well. Of the same age and type, they are as good as it gets in keeping the internals in balance. If the connecting wiring of the two strings are also exactly equal in conductance, then the battery will stay in balance as best as can be expected. The third string, comprised of cells of slightly different chemical and electrical characteristics, throw the battery out of balance.

IMO, the third string should be disconnected ASAP.
raysun
Forum Guru
 
Posts: 320
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower One: FX3048T, MX80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 4Sx3P)


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