bobbiecool
New Member
I do have another south facing roof, However, its lower and prone to shading from a tree.If you can force the installer to deal with it then i think the best solution is different panels in that location with greater string voltage.
If YOU are fixing it, you may consider just buying a standalone MPPT controller which is more compatible with the voltage and amperage from the existing panels, and adding it to your setup. The advantage of that is that all the work which would need to be done to install it would be inside your house (or wherever the Growatt is, but likely indoors and with a level surface to stand on and no ladders or harnesses or buddy system involved). Downside is if you are trying to do a bunch of logging/tracking through the growatt inverter itself, running the 6s string through a separate mppt would take that information 'offline' or to a 2nd system which may be undesirable to you.
Another option may be to add more roughly-south-facing panels to the 6s string, but in another location. Even if you had room for only 2-3 panels on another south-facing surface, there is no reason you couldn't wire them in series with the existing 6.
From the very beginning of this rather sorry affair I've wanted those 6 panels replaced. You'd think that's easy, right? But trying to deal with a company that has very poor communication and believe they are blameless is a nightmare. NAPIT, an accredited scheme operator who investigates poor installations, are really dragging their heals on this. And what's more is they think that by installing TIGO's is an acceptable solution! An absolute farce.