Need help with Epever solar controller

Hello Bill 112 and welcome to Solar Panel Talk

If that is a true MPPT type CC then it seems a little small for that 600watts. Usually a quality CC will let you know the maximum allowed input wattage but by my calculations you will be limited to only 40amps which calculates to about 480watts (12V x 40A = 480W) so you can expect over 100watts of clipping or you might release the smoke inside that CC

Yeah kind of thought that. I'm just learning this solar stuff. Have some electrical and electronic knowledge but solar is like a whole new ball game. I got bigger controller than what I needed I was using panels of 100 watts total. So was going to get a 30amp controller then thought well to be on the safe side I'll get a 40amp one. After getting it ...I ended up buying 3 ... 200watt solar panels. Then got thinking wwwooppsss I may have made a mistake...lol. I saw on here where someone told another person with the same problem...no big deal just turn one of the panels a little sideways to the sun. hhhhhhmmmm sounds like maybe an idea

Yes, it will be fine as your 600W is well below the 780W max listed. (FYI, 520 X 1.5 = 780. In bright sun light the controller will be charging at it's max amperage so make sure it has good airflow.

You can hook a little fan to the output relay and have the fan turn on whenever the charging rate goes above a certain amperage which will blow air over the controller fins and help keep it cool (if needed).

In edit, if it's any consolation, I had 2700 watts hooked to a a 40 AMP Renogy MPPT for several months while doing some testing.

I guess if those 3 200watt panels are not generating full power that CC might be ok but it comes down to "its your equipment and money to spend".

If it was my money I would make sure I followed the max input value which from what I saw was 520watts or take precautions (not aim all 3 directly at the sun) to make sure I didn't exceed the charging input amps that the CC can handle.

I guess my questions are how was that 2700watts of panels oriented and what is the measure input current to that CC?

10 270 watt panels, 2S5P. 44Volts OC so 88 input to the CC. Charge controller rated at 40 amps output @ 12V and 100 Volts input. I don't remember it's max input wattage value. Just a cheapo Renogy MPPT.

It was outputting 42 amps in bright sun. I disconnected the arrays in groups of 2 (the parallel groups) until I was down to 2 panels. The charge controller stayed at 42 amps until I was down to the last 2 panels at which point the output dropped to 38 AMP so it was outputting 38 amps off 2 270 watt panels.

This means I was grossly exceeding the max input wattage by at least a factor of 4 and it did just fine that way.

I would not set up a system that way for permanent use obviously. I was testing to see what my system would produce on cloudy days.

In the OP's case he's not exceeding any of the manufacturers maximum levels so he'll be just fine.

His maximum input per the manufacturer is 780 watts, not 520. He's only at 600 so he will be fine.

In any case, it's important the CC is not put in enclosure where heat can build up.

Charge controllers don't care about input amps, only max array volts and total wattage which changes depending on your chosen output voltage. The manufacturers are lenient on input wattage because they understand that solar panels almost never see full output and that over paneling is needed to maximize return on $$$$.