Hi,
Thanks to @Seb71 help I clarified that I need a new mppt charger for my Balcony setup.
For optical reasons ++. I got them very cheap I have exactly 7 panels with VoC of 22V and Vmpp of 18V (150W). Additionally the panels will be vertical (again optical reason), so will probably only give around 60% of Efficiency. One panel will be in shadow 50% of the time.
I actually wanted to have a parallel setup of 4 panels (including the one in shadow) and 3 panels (the ones only in the sun) in series. After some reading this seems to be idiotic / not working.
What kind of split would you prefer? I am honestly a little bit lost..
- 3/3 and ignore the 7th one (only optical) would barely reach the battery voltage of 54V (VPPmax 18V*3 = 54..)
- 7 in series would be very expensive (mppt 250 required..)
- 3 with mppt 100/20 and 4 with mppt 150/30 gives the same problem as (1)
Thanks for any hint,
Timo
PS: Initial plan was to connect all to a growatt mic 600 (which Has very high max. voltage). I now wanted to evaluate if I can include the Balcony in my normal setup.