Oversized Solar Panel for MPPT Controller

I accidentally oversized my solar panel for my MPPT controller and am wondering if there is a good way to regulate the voltage so it doesn't cut out. Currently running one 200W renogy solar panel that maxes out at 27volts and am running a Renogy 12V 50A DC to DC Battery Charger with MPPT that cuts out at 25volts. What's odd is that the charge controller cut out the other day when it was cloudy and my charge controller said it was only getting ~40W of power. Wondering if I could just run a voltage regulator instead of replacing the charge controller? I couldn't find any that looked decent so any suggestions would be great. Thanks!

I can’t think of anything.

I looked for something to limit voltage from panels and just saw a whole lot of suggestions I’d not try with my equipment.

In my link you’ll see a link for mixing panels where if you put this panel in parallel with another panel that maxes out at an acceptable voltage, it will cap both panels at that. Maybe a 100 watt panel with a VOC of 20. You will lose some output. The math is in that link. Without doing the math, I don’t think it’d be worth it.

I think this has happened before with a renogy charger/SCC. What model is this?

The charger is Model B093BB5JKF. It works but in retrospect I should have just dished out money for a Victron setup. I could add another solar panel but I also have a roof box so not a ton of room to add more stuff. It's rather annoying that renogy states you can run up to 660 watts of solar but then limit the voltage to 25. It wouldn't be so bad if it dropped the voltage or something but it just cuts the system completely.

Keep your dc-dc charger without a solar panel attached.

Use another charge controller in parallel

As sugested add a controller between panel and battery, the DCC50 can still be used for engine charging DC to DC.
Suggest Victron Smart 75/15, this will give excellent performance,

Read the Manuel.

If this your unit it can handel 50volt in put.

Suijkerbuijk said:

If this your unit it can handel 50volt in put.

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There are two versions of the DCC50 on the market, one with a 50 volt limit, and one, an earlier version that the OP has, with a lower limit of 25 volts .

mikefitz said:

There are two versions of the DCC50 on the market, one with a 50 volt limit, and one, an earlier version that the OP has, with a lower limit of 25 volts .

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I have find it .
Compleet stupid it use the same name.
And the brand have taken of the pdf file.
In deed its only up to 25 volt .
So ts can do two things .
New unit or other solar panel.

I think he use this systeem for the alternator to connect on the the dc -dc part
Solar on the mppt.

Its nice systeem to use you both options
I have uploaden the old Manuel .
This is for the version 1.1 model .

Wow that pisses me off Renogy increased the voltage on the newer model but I guess they probably realized their mistake. Thank you all for the suggestions, I guess I will just sell this charge controller and get all Victron devices.

d5894 said:

Wow that pisses me off Renogy increased the voltage on the newer model but I guess they probably realized their mistake. Thank you all for the suggestions, I guess I will just sell this charge controller and get all Victron devices.

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I do know if you use a dc to dc function on it.
If not change it
If you do just use other controller for the solar panel and do not use the mppt from your old one.