800w of panels in 2s 2p configuration

[Carpmart]

Can anyone confirm (or put me straight) that I can use an existing blue smart 100/30 Victron MPPT controller with 800w of panels in a 2 series 2 parallel configuration… Amps in by my tot up won’t exceed the 30A input from the panels (just) but obviously as the MPPT adjusts the voltage down to 14.x volts to the battery this will exceed the 30A indicated as the MPPT limit.

So I guess the crux of my question is, with VICTRON, is it the input that is rated at 30A (in my case) or the output or both?

 

[Guigsy]

If your panels provide too much current, then the Victron will just not take all the current. You'll be wasting a few photons when it's only able to send 30A to the battery.

What you can't do is exceed voltage to the controller, that'll destroy it. But that won't be a problem here.

 

[Carpmart]

If your panels provide too much current, then the Victron will just not take all the current. You'll be wasting a few photons when it's only able to send 30A to the battery.

What you can't do is exceed voltage to the controller, that'll destroy it. But that won't be a problem here.

Thanks for the reply… so the Amp rating on Victron is output and not just input then, is that correct? If yes, I will need a 80A rated Victron MPPT then as I could hit that on a sunny day!

 

[Ditcha]

Can anyone confirm (or put me straight) that I can use an existing blue smart 100/30 Victron MPPT controller with 800w of panels in a 2 series 2 parallel configuration… Amps in by my tot up won’t exceed the 30A input from the panels (just) but obviously as the MPPT adjusts the voltage down to 14.x volts to the battery this will exceed the 30A indicated as the MPPT limit.

So I guess the crux of my question is, with VICTRON, is it the input that is rated at 30A (in my case) or the output or both?

Your MPPT is good for 440w of panel I have 480w with my 30A MPPT so I am over panelled by 40w I also run 2s2p.

Try this

MPPT Calculator - Victron Energy

MPPT Calculator - Victron Energy

www.victronenergy.com

 

[autorouter]

so the Amp rating on Victron is output and not just input then, is that correct?

Yes, for the 100/30, the 30 is the output amps limit, and is a 'soft' limit. Any input power that would take it over the limit is wasted. The 100 is the volts input limit, and is a 'hard' limit, not to be exeeded. Not much chance of that with your setup. The worst case is, surprisingly, when the panel is cold, so tilted panels in winter sunshine are the highest voltage.

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[Carpmart]

Your MPPT is good for 440w of panel I have 480w with my 30A MPPT so I am over panelled by 40w I also run 2s2p.

Try this

MPPT Calculator - Victron Energy

MPPT Calculator - Victron Energy

www.victronenergy.com

Thanks Dave doesn’t let me configure to my panels, but useful…

I need a bigger MPPT

 

[Carpmart]

Yes, for the 100/30, the 30 is the output amps limit, and is a 'soft' limit. Any input power that would take it over the limit is wasted. The 100 is the volts input limit, and is a 'hard' limit, not to be exeeded. Not much chance of that with your setup. The worst case is, surprisingly, when the panel is cold, so tilted panels in winter sunshine are the highest voltage.

I was talking about cold panels with Dave (Ditcha) earlier this year and he said a nice little sprinkler system for the panels would improve yield!

 

[Ditcha]

Thanks Dave doesn’t let me configure to my panels, but useful…

I need a bigger MPPT