Originally Posted by G Shaw
I am looking for info on powering my internal 12 lights, fans etc with something else than my house batteries. Are any manufacturers using converters to transform 120 volts AC to 12 v DC? Tks
Such devices are built into most every RV worthy of the name, I have had a couple of very old, very small trailers that did NOT come with them but anything over 19 feet shold already have a converter, this is the device that charges your batteries, AND runs all your 13.6 volt stuff.
IF YOU DO NOT HAVE ONE, then you have options.
Pure power converter, not a battery charger or converter/charger
First determine your power needs, A 1141 lamp is about 1.6 amps, a 1156 2.2 amps. Go to a lamp web site and add em up,
For small numbers (IE: 7 amps) Radio Shack, while it lasts, has some nice regulated supplies, They are in bankruptcy and it appars will not survive so you should see some nice fire sale prices sooner or later.
Progressie Dynamics makes converters and converter/chargers and at least one line (9100) that is upgradable.
I would recommend the 9100 line, Something like a 9140,9160 or 9180 (Depends on how much battery you can carry) anything in that range.
By itself it is a single stage converter, it will power your 12 volt stuff all day (or night) with no issues, but if you would also like it to charge your batteries.. Well no problem, about another 25 bucks gets you the CHARGE WIZARD, I will give you the instructions for installing.
Remove dummy plug
plug in wizard (Like a telephone modular plug with an anchor screw)
This converts the 9100 into a 9200+ dongle which is, as far as I am concerned, the very best converter/charger (There are others that are close enough to not argue the point but this is the one I like best)
how to choose the last two digits.
Add up your batteries amp hour (c/20) ratings and multiply by 0.3 (30%)
Group 24: about 75 each
Group 27, About 95-100
Group 29, 100-105
Group 31, 125-130
GC-2 (six volt golf car you use two in series) 215-230 per pair
My Rig came with one pair, plus a group 78 Starting battery (Think Group 24) and a Progressive Dynamics 9180+wizard.
Batteries made it to 9 years before replacement. (with occsional watering of the GC-2 pair)
TS-2000 (Very sensitive radio receiver) can not tell if it is operating off pure battery power, Pure converter power or both together, Some folks complain that the Progressive Dynamics converters are noisy (electronically) casing radio interference, I see no evidence of that in my rig, noise floor does not change when I disable it.