Oversizing Solar Panels

If you take a look at the specs of the EB3A it mentions that the solar panel(s) should have a VOC between 12 and 28 V and a max. current of 8.5A.

My question: could I use a larger panel with a higher current? As long as the VOC is within range? Shouldn’t the MPPT be able to just limit the current?

The two reasons I’m asking this are:
1.) I’m thinking about getting second hand panels. There it’s much harder to find the “perfect match”
2.) I rarely have perfect solar conditions. I want to have a reasonable output under those conditions. It’s okay to waste some potential when conditions are better.

The short answer is yes, From what I have read as long as you do not go over the max input voltage you can over feed current and it will just be limited by the MPPT. Its fairly common to “over panel” a system because you rarely get the listed output from a solar panel. Now if you live somewhere where its almost always sunny like Nevada, Arizona, Florida, Etc. maybe you wouldn’t need to over panel aa much but if your in a less sunny area and you’re buying used panels you may want to consider doing just that.

I concur with @doecliff. The EB3A MPPT controller will not pull more amps than it supports, but it will break if you feed it too high a voltage. Generally you’ll want to find panels with an open circuit voltage as close to 25-26V so you can get the most watts when wiring it in parallel with a similar panel. 2 panels a lower Voc wired in parallel will max out the 8.5A current input and you won’t be able to get close to the 200W input limit. So if given the choice between multiple panels, chose the one with the higher open-circuit voltage but under 28V. For better efficiency, your panels’ Voc should be as close as possible.

Hi @tschaboo , welcome to BLUETTI community!
There is no problem with having more current/power as long as it is within the open circuit voltage range, just that the extra will be wasted.
Have fun and hope you enjoy using EB3A :blush:.

Many thanks to all three of you for your very helpful answers!