Over Amperage to Charge Controller - MPPT-60

[Zardiw]

MPPT controllers, in general, can handle over sized arrays. They have the capability to throttle back the amps to stay within their heat and rated amp limit. I would not go much more than 150% over the controller rating. If your controller handles 4000w at 48V, it could most likely handle 6000w and still be able to self limit. A lot depends on the array voltage and how the controller "de-tunes" the PV array to stay within limits.
In all cases, follow the mfgs suggestions.

Thank you!........It's a Morningstar MPPT-60 .......Good to know I can hook up enough panels to where at times under high sun, it will put out more than the 60 Amps it's rated for.....

Most of the time it probably won't go over that......but when it does, I imagine I'd be wasting power from the panels........power that is over the 60 Amp rating.

Fwiw, I've got a DIY 24 volt system, and right now I've got 7 panels hooked up......that have 67 cells each.....

I'll take current measurements in the summer time when they're putting out max......and if I'm generating way too much, I'll switch some panels to another controller.....

Thanks again!
z

[Sunking]

Was wondering what happens if your PV Array puts out more amps than the charge controller is rated for.....like say your system puts out 80 Amps into a MPPT-60.

Not really possible unless you really have no clue what you are doing. MPPT Controllers are Buck Converters meaning they convert a higher voltage (lower Current) to lower voltage higher current. In other words an oxymoron or DIY question. Just not something you would ever do. Possible, but you would have to work really hard to be a foolish moron.

You would really have to way over size the panels considerably to even have the Input Current = Output Current whihc would mean you just changed your MPPT Controller into a PWM Controller, thus throwing or clipping 30 to 35% of your power into the garbage can. Not too mention woul dmean the panels are configured wrong

[SunEagle]

You will clip some of the amps but more than likely if the CC is not built to handle 80 amps in then you could burn it up.

[Mike90250]

MPPT controllers, in general, can handle over sized arrays. They have the capability to throttle back the amps to stay within their heat and rated amp limit. I would not go much more than 150% over the controller rating. If your controller handles 4000w at 48V, it could most likely handle 6000w and still be able to self limit. A lot depends on the array voltage and how the controller "de-tunes" the PV array to stay within limits.
In all cases, follow the mfgs suggestions.

[Zardiw]

Was wondering what happens if your PV Array puts out more amps than the charge controller is rated for.....like say your system puts out 80 Amps into a MPPT-60.