I wanted to connect 12pcs Sunpower 525W panels with specs as per the attached datasheet (6 on each MPPT) to the Multi RS 48/6000. Will this cause issues?
Datasheet
As long as you don’t exceed the short circuit current, I believe you are safe.
Although on various extreme situations (cloud edge effect) you may be in the danger zone.
Hope they (the India people) have used good quality semiconductors…
To be honest, the Isc limit of MultiRS MPPTs is quite low…
The previous version, the one with only one MPPT has a much higher Isc.
Also the MPPT RS, which shares about the same hardware has a much higher Isc. (20A vs. 16A)
Have you tried the MPPT calculator on the Victron site?
I tried but I couldn’t find the inverter in the options
I noticed this too, makes it hard to choose panels
When I type your panel there there is no RS system that can handle it. So no, you can’t
Also don’t forget that there are 2 types of MultiRS: with one and 2 trackers
He said that he has 2 trackers: …(6 on each MPPT)…
My bad, yeah, you can’t quite use the RS450/100 specs for that but it will still calculate the values which you can compare to the MPPT specs for the RS Solar.
According with the datasheet @lxonline has posted, only the rated current is exceeded. The short circuit current is in range.
And this according with the STC condition. I believe that NOCT are more relaxed, so, yes, in my opinion, you can use them. I would.
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On one tracker MultiRS there are also 2 MPPT strings available (I have this version). I even connected 12 TW Solar 440W panels the same way that in the post (6 per string). That was ok on voltage, but total amperage was higher than inverter can handle, so I cannot take a full power out of it. Thats why I now have 9 panels on RS and 3 panels on MPPT 150/45
Do you mean there are two pairs of connectors that are internally connected in parallel to just one MPPT?
Yes, exactly
On string on each tracker will be fine. The ISC max is 18A. The panels are just under 15A.
On the online one you have to check inverter as an option if you want the multi rs to appear.
I did a half baked one here.
mppt_calculator_03_09_2024_12_48_22.pdf (754.6 KB)
Boy, that’s strange, because most of the panels are around 10A Isc and above.
It must be quite a developing period with MPPT RS, Multi RS one tracker, Multi RS two trackers, Inverter RS Solar, etc.
And maybe they started with the MPPT RS in mind which has 20A Isc per tracker.
@lxonline
He has Multi RS, not inverter RS… Title… 
Multi RS has a much lower Isc.
Did mention half baked. But if you check the ac charger. Multi appears.
There is a 16 A max max on the multi. @mufmur i apologise. But please not the warning afterwards. It states you can connect higher than the ISC in the datasheet, but dont mess up polarity.
Full config multi mppt calculator pdf here.
Uploading: mppt_calculator_03_09_2024_13_04_42.pdf…
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I am confused…
Are you sure? Higher than ISC, meaning higher than short circuit current?
So if I am respecting the polarity, can I connect, for example, 25A of panels, on a max 16A Isc input?
Probably higher than Impp, but smaller than Isc…
[quote=“Alex Pescaru, post:18, topic:1995, username:alexpescaru”]
So if I am respecting the polarity, can I connect, for example, 25A of panels, on a max 16A Isc input?
[/quote].
No
As long as it is not above the absolute max limit of 16A ISC (short circuit adjusted for temperature). It is quite clear in the sizing section of the manual. Don’t make a mistake on polarity above 13A.
And it is an (more common that it should be) error that can be made between the breaker and MC4s on the bottom of the unit if a person is not doing due diligence.
My internet is driving me mad today the drop outs are horrendous.
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