Join Date: May 2005
Location: plymouth devon
Thanked 6 Times in 5 Posts
Runs on 620 watts with allowance for losses, you will need around 3 amps @ 240 a.c.
To get 1amp @ 240 a.c. You will need around 26 amps @ 12 volt d.c. so app 78 amps from your batteries. You dont state what van you have, some pre 2008 vans only had an 80 amp alternator, whilst the a/c will not run continuously it will cycle on and off. At start up it will probably draw twice the current to start if only for a few seconds. If you have two fairly new 100 amp lead acid batteries the most will have is around 100 amps. If stuck in heavy traffic your alternator may not keep up with your requirements. I would get a quote for dash air for your van and compare the cost verses the possible failure of your proposed system.