Reducing voltage from a single solar panel before mppt

[PhillC]

I have purchased a Renogy DC to DC charger and MPPT not knowing that the maximum voltage is 25volts. Is there a suitable way to reduce the volts of a single 405W (37V max output) solar panel so that it would work with this Renogy DC to DC charger? Knowing that the DCC50 has a maximum solar panel voltage of 25 volts. Checking online two possibilities that came to me are, using a buck converter or maybe another Mppt before the Renogy DCC50 to do this: 2 examples below

Buck converter - https://www.amazon.es/dp/B07ZV7VDF4...51-aaab-620ba5d3b032&pd_rd_i=B07ZV7VDF4&psc=1

Cheap Mppt - https://www.amazon.es/-/pt/dp/B088T...colid=2TRBQSTXMT56S&ref_=lv_ov_lig_dp_it&th=1

Any consequences of using these methods to adjust the voltage to lower using either of these methods?

 

[timselectric]

I would just recommend getting the right SCC for your panels. Or the right panels for your SCC.
Bandaids are not designed to be permanent.

 

[MichaelK]

OK, that is NOT a "Cheap MPPT". That is actually a FAKE MPPT. You were scammed. If you can't get your money back, I'd suggest just throwing it away and starting over. Do better research next time. Look at maybe an Epever 4210AN as a lower rung entry-level MPPT.

 

[pollenface]

I gather that vendors do not even know what they are selling and perhaps MPPT is a term generally thrown around the woods for ANY solar charge controller no matter how cheap. BEWARE the internet is full of crap, check back with us before you buy another one.

A wise person on here once said, "if it has USB ports, it's not MPPT"

 

[MichaelK]

I gather that vendors do not even know what they are selling and perhaps MPPT is a term generally thrown around the woods for ANY solar charge controller no matter how cheap.

Worse! One Chinese company is named "MPPT Solar", which they slap onto every low-budget product they make. Then they label the product "charge controller". So, what you see on the front cover of the unit is....

MPPT Solar
charge controller

 

[HRTKD]

Do it right the first time. Don't make the system any more complicated than necessary.