Quote:
Originally Posted by fastegg
My car is a '98 Lexus LS400 4-litre V8.. If I was to run an electric water pump, electric power steering pump, electric fan... those things coupled with fuel injection pump, ignition, stereo, ECU's for everything, other power consuming do-dads which the car is full of... how many amps per hour am i up for ?
... My guess is about 85 amps. .. ... .... .....
*** and I reckon 14 volt batteries, so when they started running low, the volts probably, hopefully, won't drop below 12 volts...
... I wonder how many batteries I'd need ?
.... and a decent charger to charge them each night.... possibly even a 3 phase charger...
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Fuel pump: 9-10 amps. (car I tested was a newer Caddy DTS)
Electric water pump: Maybe 3-4 amps. (my auxiliary pump draws 0.9A)
Electric P/S pump: Depends on how it's done. Example the EPS motor and controller(3 phase) in a Pontiac G6 is rated 65 Amps max. Think parking lot maneuvers standing still,on the brakes turning steering wheel like most ladies do it.(my apologies to the ladies who let the car roll when turning the steering wheel!)
A LOT less draw when driving at speeds!
Radiator fans: (guessing) 5-20Amps depending on speed.( I could test one for you if you wish!)
Blower fan: (my car) 9 amps on max speed 2 amps on lowest speed.
ECUs: (guessing) 2-3 amps max.
Low beam headlights: (my car) 8.5 amps
Stereo: You really going to use one?
85 amps is a very very high guess in my opinion.
For batteries I just run 3 regular car/truck batteries parallelled for roughly 180 A/h capacity. It is plenty for my 60 mile commute to work and back. (Lights on for the way back).
And like Frank said reduced electrical load makes it much better! ( LED running lights,no stereo blasting etc. )
Barna