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AXPERT VM III 5000-48V + MPPT 5000W


tonio
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Hello.

unfortunately the weather is bad,I couldn't put the panels on, I write when I did.

My question is this.

I put up 4 batteries, type: YUASA SWL2500T

https://www.intercel.nl/media/datasheet/yuasa-swl-2500tfr.pdf

this is how I set the charge:

image.png.59580a5408cf68afba4c32b4ad5284cc.png

 

this is good? what is the maximum for the ampere?

Thank you in advance for your help.

 

 

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8 hours ago, tonio said:

I put up 4 batteries, type: YUASA SWL2500T

https://www.intercel.nl/media/datasheet/yuasa-swl-2500tfr.pdf

Those are 90 Ah modules. They are very small for a 48 V inverter.

8 hours ago, tonio said:

this is good?

The settings seem OK, except for the back to grid and cutoff voltages. To get reasonably life when long load shedding is likely, you need to set these much higher. Perhaps 48 V cutoff, 50 V back to grid. Maybe one volt lower for both of those. Keep 2 volts between the back-to-grid and cutoff voltages, as per FAQ 2. This will not give you much run-time, but you can't safely get much more out of those tiny battery modules.

Quote

what is the maximum for the ampere?

Maximum charge current is 22.5 A, so 20 A in the setting is correct.

As for what the maximum discharge current is, it's specified quite strangely (to my eye). It seems to be saying that at a 2500 W (per module) discharge, it will last only 10 minutes. But that's 208 A. A 5 kW inverter at full power will be more like 117 A. So it might last around 20 minutes. So I would keep the loads under about 2000 W if at all possible, with the average load much less (under ≈300 W). Or get more or bigger battery modules.

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Hi  Coulomb

Thanks for the reply.

now the budget does not allow more battery,the piece of these was very cheap,consumption is also low now, here is the graph

image.thumb.png.92b6cfd060ae412619c1573944674e4f.png

image.thumb.png.146b223262a636a31d85b17093cf5dcf.png

operated on battery for four and a half hours.

 

 
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On 2020/10/23 at 4:49 PM, tonio said:

Document says max 5000W PV input. How long this can be increased, 10% - 20% ?

The recent 5 kVA models all have a nominal 4000 W (80 A @ 50 V) solar charge controller. So that's a 25% overclock already. So I don't believe that you can overclock any further than that.

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What I'm doing wrong?
This is my setting:

image.png.c8798bbf097b50eb4b8f4e154ff4c3bf.png


why not charge continuously at 54.6 volts, why not keep it at this value?
Back to discharge voltage: I set it to 58-V. Charging does not stop at 54.6 volts.
Charges to 58 volts, then switch back to battery mode.

 

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18 hours ago, tonio said:

Did someone try to use this way battery balancer?

 

Hey

I done did it like this, but with Gel batteries. I use Victron Battery balancers

image.png.77f7e5c5a978dba82c22d91fa947fa06.png

 

18 hours ago, tonio said:

Did someone try to use this way battery balancer?

image.png.6e75bda9f6a8b16d047c099e34c1db40.png

See no problem, just need to check your charging amps to charged the batteries x 2.

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Hello

I found the answer to what I was looking for,

Victron document says: Connect two or more battery balancers in parallel (on average one balancer will take care of up to three parallel 200 Ah strings).

 

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