Electronics > Power/Renewable Energy/EV's
Paralleling solar panels
uer166:
I know better not to do it, but I have 10 panels with Vout of 65V each. If i have one string, that is 650V, if two, then 325V. In either case, the price of a total of ~3kW of MPPT capacity is very high for whatever reason. The cheap MPPTs seem to top out at ~250V PV.
So, what are the downsides of paralleling say 5 (or 10) 325W panels, all in identical conditions/temperature, and no shading?
Jeroen3:
The input current of an MPPT is also limited. Typically around 15A.
Paralleling solar panels requires different strategies for power tracking and is uncommon.
I can buy a 3kw growatt with 360 Vdc nom input for less than 500 euro.
Three phase output inverters can typically handle higher dc inputs.
uer166:
--- Quote from: Jeroen3 on May 17, 2023, 07:20:16 am ---The input current of an MPPT is also limited. Typically around 15A.
--- End quote ---
In a non-isolated buck, the input current handling should be same as output, would it not be? All the ones I'm looking at are 40-60A output non-isolated buck MPPTs. 500 Euro is eye-watering for this application. You're right about the panels, it's a totally different optimization..
Jeroen3:
You are looking for a DC/DC application?
tautech:
--- Quote from: Jeroen3 on May 17, 2023, 07:20:16 am ---The input current of an MPPT is also limited. Typically around 15A.
--- End quote ---
Yet the Morningstar ones I remotely monitor are rated to 60A. Commonly see them from 2 and 3 panel arrays charging at 25A.
While double checking that online I notice they have a new 600V product also rated to 60A.
https://www.morningstarcorp.com/products/tristar-mppt-600v/
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