Controller as Converter ?

SWAG’d why the gent in the video went with a 15a MPPT controller. Seems his 24v power supply was 15a also.

https://www.amazon.com/NEWSTYLE-Universal-Regulated-Switching-Computer/dp/B01CS5G8J6/ref=sr_1_1?ie=UTF8&qid=1478971752&sr=8-1-spons&keywords=24v+power+supply&psc=1


Here is the Meanwell version:

https://www.amazon.com/dp/B00KTJE3L4/ref=psdc_1161760_t2_B01CS5G8J6

15a seems the common size.

There are two ways.. I will post the proper way

"Charger" with filtered output - Charge Controller - Battery

NOTE not all chargers have filtered outputs.. if the one you have does NOT have filtered out, a "Hardening Condenser" or "hardening Capacitor" form a high end automotive audio store will provide the needed filtering.. I do recommend filtering.

NOTE There are two types of controller as well.. One (and I'm not sure which) will work better in this configuration, PWM I suspect but the keyword is SUSPECT.. I'm not sure on that.

Good research! Thanks very much.

This might be it

Solar controller with 24v power supply

OK, I kinda see the purpose here. Carry on BFL, we always need experimenters to find the neat toys.

I have a couple ideas how I might use such a set-up if it would actually work. Too vague to specify right now :) Want to read that thread again first.

EG, Suppose in a truck camper, you could swap inputs with a big switch to the solar controller input, between solar panels or the truck's alternator to camper input, and get the specified battery voltage for your particular battery type/model either way? (No gen to run a charger from in this sceanario)

Also supposing I could use my existing solar controller selection, and not necessarily have to get one like Mr Wiz's. Would it need a buck converter in it (be an MPPT) or could a PWM (no buck converter) do it? Lots to learn before getting too excited. :)

Around here we call that going to Duluth by way of Mankato.

Since there are devices that will deliver 80 amps at a range of lower voltages, a charge controller would only allow for the control or duration of the DC output.

What is the interest or application of the use of a charge controller?

I do recall that thread and think Mr Wizard is correct about the construction.

i seem to remember a thread, short TT, used an adjustable power supply (like a mega watt) for the input power, IIRC set it at 16v
then used the solar controller as the charge controller

but i'm running on memory and the details are a bit fuzzy

all the items were up front in a cabinet near the entry door
to be close to the batteries

It wasn't Mex. Might have been one of those alternator deals as the source, can't remember. Just that everyone thought using a 15 amper was sort of useless. But now here is a cheap 40 amper that might do it. The thread will say how he hooked it all up I hope.

Hi BFL13,

You still need a power source. Mex did use a charge controller as a battery charger. I don't remember if he said what he was feeding it with.