I have recently instaled a Goodwe ES5048 inverter with 12 X 330W panels on 1 string the max power I have seen is ±3600W from this string, however they provide much less than this most of the time. The next 12 panels are to be installed shortly which could be another ±3600W max power,this would as I now see be too much overall for the system to cope with (Rated 6000W max).I would still like to install  all the panels and not minimise the system which at most times would be under the max.Is there a tracking shunt or regulator of some sort that could be used to clip off te over supply

Batpower

The ES units are advertised as supporting 30% PV oversizing, so the total Wp of your panels can be up to 30% more than the rated PV input maximum. If you google around, you'll see that oversizing is often recommended, this is indeed to fatten out the power generation curve during the day.

Just be careful, the MPPTs on that GoodWe have a 550V maximum (each). For your second string, rather get panels with a higher power output (Wp) so that you can keep the total voltage below 550V (i.e. not adding MORE panels), with a bit of safety margin.

 

 

Edited March 3, 20197 yr by cpbotha

4 hours ago, cpbotha said:

MPPTs on that GoodWe have a 550V maximum

They also have a maximum current of something like 11A or 13A, I can't remember exactly.

It's a bit confusing. Yes the the Goodwe spec is 6000 v and correct 11 A, what I saw when it was at that peak 3600W was ±450v so all seems Ok,Where it gets confusing is that there are 2 MPPT"s at 11Amps each, but IS the Max input Voltage 580V per string (MPPT) or total. But this isn't really the question I would really like to maximise the system and get the excess power from the panels when conditions are perfect to be reduced to that magical max 6000W by some sort of controller /regulator