I just bought a Jump Start 1900 from Super cheap auto ($180 ouch) ,and I wondering if anyone has has ever used an inverter attached to one of the things in order to run 240v appliances? I'd like to run my laptop and my ETX telescope at the same time. Can this be done safely?
Oh yeah, and can anyone tell me how to work out the amp hours on this thing as it doesn't say anything other than it has 1900amps. I assume it's 19 amp hours but I'm not sure.
I once used an inverter running off my car battery (via the lighter socket) to power my IBM Notebook computer and it survived the experience. I restricted the usage to around a couple of hours just to make sure the car would start...
Inverter loads are basically mental arithmetic. If your laptop load is say 60 watts through the inverter the power used will be around 10-20% more, say 70 watts, divide that by 12 (approximation only) to get the current drawn in this example roughly 6 amps. If you have an 18 hour battery you could expect just under 3 hours. Battery capacities are usually rated at the 10 hour rate, e.g. a 7 amp hour battery will deliver .7 amps for 10 hours, draw 7 amps and you will get significantly less than 1 hour.
