24 volt to 12 volt converter
Looking to run 600 watts of solar to my 40 amp MTTP controller at 36 volts. I have 4-6 volt batteries. So I need to get my 24 volt battery bank down to 12 volts to my Magnum 2012 inverter charger. ...
Forum Discussion
Almot wrote:tdevery wrote:
I like the idea of having at least 200watts for power if needed. I pick my campsites on google earth to try to get some sun. But with older state parks in PA, this is hard to find.
You will like it better having 200W portable and 500W permanent :)
Permanent will work on the road, and on open camps, and (a little) under the trees. It still works in leafy shade on a sunny day - poorly - but it works all the time.
You already have 40A controller for 500W permanent. Being MPPT, it can accept 24V panels, they are cheap per watt. Your 2 portable arrays will need 15-20A PWM controller, one for both, it can be found for ~$50. It is not likely that you will have to use both PWM portable and MPPT permanent at the same time, but don't see anything that would make such a pairing impossible.
Yes, I did (of course it was me :) ) I ran two controllers on the one battery bank. One PWM and one MPPT. All you need (but it can be off a bit) is to have them at the same high voltage set-point, so they will add their amps all the way up to Vabs.
You can still gets lots of time when they will add their amps if one is a bit lower in set Vabs. If you have long sunny day it just doesn't matter-- it all gets done no matter how theortically imperfect your set-up is.
