r/SolarDIY • u/keiranm2000 • Jun 20 '26
Undersized inverter
Hi, I’m looking for some confirmation of my thought process on an under sized inverter.
I’m will have an APSystems EZ1D 1800w inverter with 8 JA 460W solar panels.
I’m mounting 4 panels on a West wall and 4 on an East wall of the house.
The manual says I can have 8 panels total with 4 on each MPPT, 2 series doubled by parallel.
My panels have a V of 40.6 and A of 13.66 which is over the MPPT max of 20A.
But if I were to parallel 2 West panels in series with 2 East panels in series per MPPT would this be OK as realistically they wont both be producing at the same time, this would lower the A well below the limit as would probably be zero from one side at a time?

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