EpEver MPPT controllers
The EpEver line of MPPT solar charge controllers is an excellent value-for-money for some use cases. They cost about half as much as prettier, more-prestigious controlllers.
the controllers can take massive overpaneling
; the smaller units (≤40A) have documentation that allows +50% overpaneling1)
. The larger units show +200%2)
the passive heatsinks are huge for their rated capacity
accessories like display, temp probes, etc, are extremely inexpensive
the current user manuals3)
are quite good
As with vans, all controllers have issues. This page aims to list known4) issues with EpEver controllers.
They may not be a fit for all use cases, though. Consider these drawbacks in the light of your own intended scenario:
the MPPT algorithm is not particularly robust
the large AN controllers (≥50A) have undersized terminal screws
which can snap under overzealous tightening. IMO
EpEver should update the design with hefty BN-series terminal screws.
firmware does not appear to be field-upgradable without hacking
Absorption duration cannot be zeroed out; the minimum duration is 10 minutes.