hi there
I know nothing about electronics and would like some expert help please. I have a ford transit connect van and use it when I fly my drones. I need to re-charge the drone batteries on site and have looked at the possibility of installing a separate battery and inverter. My stumbling block is do I set the voltage to 240v? All the chargers I have, come with transformers as I imagine they are designed originally for the American market.
My thought is to by-pass the transformers (on the battery chargers and macbook) using a voltage that can deliver 17.5v at between 2 and 5.72a, 26.3v 3.83A 100w and 20v 4.25a. is this possible? or is it safer, more flexible and even possible by the 240v method? To a novice like me it seems odd to take 115v up to 240v to bring it back down again. but what do I know?
please help!

 

Keep it safe by using a step up/down transformer to deliver the needed AC voltages for the chargers from the inverter if it can't supply the correct AC voltage.

 

I would use Buck-booster converters for the individual chargers from the battery, giving 12V in and 17 to 30 v out. Remember that the total wattage out is less than the total wattage drawn from your van battery, by about 15% so, 100w output will use about 120w from the 12V battery, @10Amps appx.

Like LTM8055 type...


http://www.linear.com/parametric/Bu...25!vout_17!iout_5!vout2_!iout2_!vout3_!iout3_