Can a 5000w inverter handle PV load on 6000W ?

[jhx]

Hi
i now have a setup with.

PV 1200W
CC(charge controller victron bluesolar). 150/85
Inverter Victron: 48V 5000.
Battery.B 12x gell 220ah12v= 48V

I wanna add.
PV 4800W (12x400w)
CC 150/85 linked with the 1 one.

My ? is.
- Inverter: is there a problem my total PV is 6000W and the inverter is only 5000w ?

 

[snoobler]

No. You could have 100,000W of PV and run a 1000W inverter.

Noe your 5kW inverter is really a 4kW inverter with a 5kW 30 minute overload. Plan to use it as a 4kW inverter.

4800W is slightly too much panel for a 150/85. 85 * 48 = 4080W. The controller can output 4900W @ 57.6V, but you only get that much at the moment absorption begins. At float voltage, you'll be able to get about 4600W. This is not a big deal, but there is some solar capacity you'd miss out on.

Your other SCC is under-utilized.

Your sketch implies 16 new panels.

Make sure you stay far enough away from the 150V limit to allow for cold temp effects. I didn't and had to upgrade my 150/100 to a 250/100.

 

[jhx]

Thanks for your reply.
And info about usable 4kw Inverter

SCC i went for 4800W the date page says Max 4850W
."Your other SCC is under-utilized." Yes but this is my first setup, i´m now upgrading. I got the 150/85 second hand.

You know if different Victron SCC can be combined/linked with the U45 ?

-Sketch: Ups i see now ..... But i´m going for 12x400W in 4x 3pv setup

Under 150V: i´m sure i keep under the 150V limit but i´m in doubt if it is the 3x Voc ore the Vmp to calculate with If it is the Voc it is only 1475V

 

[snoobler]

To my knowledge the only two ways the MPPT can be "linked" are via a VE.Smart bluetooth network or via a GX device. Note that having them linked is not necessary. They will still function acceptably even if completely independent.

You must use Voc for computation on the 150V.

Your Voc is 49.5V, and 3S produces 147.5V. That only leaves a 2.5V margin. Your panels have a Voc coefficient of -.289%/°C. That means that for every °C below 25°, the panel voltage INCREASES by 0.289%.

Thus your panels must NEVER see any temperature less than 19.5°C (67°F), or you will exceed the 150V limit. That means your RECORD low temperature for your region must never have been lower than 19.5°C, or you run the risk of blowing out your MPPT.

I made this mistake on my 72 cell panels with Voc very close to yours. I got lucky and discovered it before it created an issue. Due to my array size, I had two options: 1) get a second charge controller AND rewire for 2S, or 2) get a single 250/100 unit and replace the 150/100 leaving the array 3S.

I went with a new 250/100 and sold my 150/100.

If you have similar Voc/Vmp panels on your first 150/85, you can possibly mix panels to better utilize your first 150/85.

IMHO, unless you live in an incredibly warm region with year-round temperatures above 19.5°C/67°F, you need to wire your panels 2S6P. You also need to assess your 1200W array for the same issue.

 

[jhx]

O shit I did not calculate with temperature. I´m often below 19*....We have night frost in winter and 35*Cel. in summer
TANKS

Linked: I´m reading that in the instruction on my SCC "connect them with an RJ45 cable"
It is the old model long tall with the display also called blue solar like the new one I have.

New 12x400W PV
So how about series of 2 then? That must give me 97V and 58A Right?

1200W
My other panels are 200W With VOC 45,21V VMP 36.86 ( i have them in 2x 3 panels for Nearly a year with no problems )

I really appreciate your help thanks a mill :-D

 

[snoobler]

Yes. New array 2S3P (2 panels in series, 3 sets in parallel)

On the 1200W array, if you're saying you have them 2 in series and then 3 sets of two in parallel (Voc= 90.42), then you're definitely good. According to this page:

AS-5M-200W 200 Watt Solar Panel from Worldwide Energy and Manufacturing (Amerisolar)

Specs/datasheet: AS-5M-200W solar panel made by Worldwide Energy and Manufacturing (Amerisolar) has 200 watt output power with module efficiency 15.7% .

www.posharp.com

They have a Voc coefficient of -0.33%/°C meaning they are MORE sensitive to temperature than the new ones, BUT they have more margin to start with at 135.63Voc. They are good in 3S down to about -7°C. You might find a slight performance improvement in reconfiguring to 3S2P provided -7°C not a risk in your area.

The panels are not sufficiently compatible to consider mixing them on the same controller. You would take a performance hit greater than anything you would gain by reducing the utilization of the second 150/85.

Good to know about the linking. I'm only familiar with the newer Smartsolar units, and I think they dropped the CAN interface in favor of bluetooth and VE.Direct.

Lastly, your battery...

12X Gel 220Ah 12V @ 48V?

If you have 4 in series for 48V, and you have 3 strings, then you have a 660Ah 48V bank.

If that's the case, you want to limit your peak charge current to 10-15% of your C rating, i.e., 66-99A

6000W/48V = 125A at very low SoC
6000W/57.6V = 104A at absorption voltage

If you tend to get fully charged early in the morning well before peak solar, then this is not a huge concern.

You should check the following:
1) Your battery specification permits a charge current this high. Gel batteries are typically a little lower than FLA/AGM, but that varies.
2) Your battery bank is wired to optimize and equalize the load between strings (link #2 in my signature "Wiring").

 

[jhx]

Good morning

PV
The 1200W is 3S2P
Mix not an option check

4800W 2S3P Check

I made s simple 4800W diagram with fuze and a DC protector

Direct Current Surge Protector | WccSolar

SPD DC 500V, 800V, 1000V, 2P, 20 ~ 40KA, Household Low Voltage Surge Protection Device, 2 Pole, Surge Protector for PV Photovoltaic. These units must be installed in parallel in the DC networks to be protected and provide protection in common and in different modes. Its installed The location...

en.wccsolar.net

You see any trouble in my PV Fuze and dc protection diagram ?



Battery bank & Charging:
Yes my BB is 12X Gel 220Ah 12V @ 48V "victron"


My settings is defult setting Algorithm nu.2 "Gel victron deep d". : 57,6V / 8H Float 55,2V
i Attach the page.

Cabels:
O yes next big point.
I´m not sure i get the Wiki page right. i get in a 668A 5,33mm2 pr Meter. But it does not make sense. Anyway.

Victron manual say 1x70mm2
My set up is now with 25mm2 cables.
So i´m thinking to add a 50mm2 cable on all this place on the diagram Correct?

I attach Vic manual cable page
- Cable diagram.
Pic of my setup in case my drawings do not make sense