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
  • it will adjust to changing conditions, but it can be slow. One might say “plodding”.
  • it can be slow to react after long periods of no load - see this reddit post where I describe the phenomenon
  • it can get confused in complex solar conditions, as with partly-cloudy skies and high winds, or in breezes that move partial shade around on the panels. In these conditions Vpanel can fall to just above Vbatt, severely hobbling solar harvest.⁵⁾
• 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.