[Seerseraxlils]

and you save the price of an inverter, but it still takes the same power to do a certain job, regardless of the voltage and an inverter at idle uses very little juice and if you run your appliance from 12 v it will draw 10 amps and if you run it off of 110 it will draw 1 amp, but you will still be pulling 10 amps off the battery. the only way you would save much is to have your fans run off 12v and then when your bank was charged the fans would run directly off the panels and use them instead of the panels shutting down.

And your reason is sound to use low voltage if it was available on all the things you need, but we used the same lights that we use here at a far greater price,There I paid $30 for them, here I pay 200 baht. 15w lights put out enough lumens to do the job of 75w incandescent bulbs but at 1/5 the power used. when you are using a solar system and batterys, you learn to use energy efficient parts. but wiring with 12v has to be bigger to carry the juice without a voltage drop.with an inverter you use standard house wiring.
for long runs of wire it has to be very large to keep the voltage up.
and you must have storage batterys anyway.
We had a dual voltage tv, but it drew the same watts no matter if it was on 120v ac or 12v dc, still 100 watts.