bhgl
Well-Known Member
- Joined
- Feb 28, 2024
- Messages
- 379
- Vehicle Year
- 2003
- Engine
- 3.0 V6
- Transmission
- Automatic
Just curious, when you say "rooftop solar" are you talking about the roof of the truck or of your house?
EDIT: Somehow I missed that you said you have a 1000W compressor- that was going to be my question, have you run the math on how many watts of solar you could fit on the truck? Wasn't sure if you were suggesting ypu could run the compressor in the driveway to "pre cool" the cabin or if you're planning to run it while parked in the wild.
On the roof of the truck, I think I can squeeze 300 watts of solar up there if I go crazy on getting the most up to date panels. They won't generate enough to run anything on their own, but they'll help in supplementing the storage batteries when I'm off grid, parked, and while driving. Also just give me guilt free charging for my laptop, phone, camera e.t.c. when I'm off camping. In ideal conditions, it's going to charge a 100 AH battery after around 4-5 hours of good sun, for the purposes of supplementing the alternator, and existing battery (which I'll most likely replace with an AGM battery) it should genuinely keep essential systems running without demanding peak output from the alternator at all times.
I have gotten into the habit of plugging my car's block heater in even during above 0C weather, as it helps reduce wear and heat up times, with a proper charge controller for the panels, I should also be able to plug the truck in to charge it's main and supplemental batteries, or even run the vehicle with the engine off and not deplete them. Meaning "free" AC at powered campsites, or wherever I'm staying that has a plug, and I can surprisingly easily route airflow into the bed.
Total amperage demand at ABSOLUTE peak consumption, that means all lights on + brights, wipers going, AC blowing with electric compressor, wipers on, a max load from the 12 volt power point, interior lights at their brightest, stereo blasting, flashers, and the electric powersteering running at its max is in the realm of 230-250 amps @ 12 volts, so 2760-3000 watts. Granted, this isn't how the car is going to be driven, but it's important to have an idea.
In reality electricity demands are going to be lower pretty much all the time.
Except of course in the event I'm driving while trying to read a paper map, in the dead of night with my brights, while it's raining, but also incredibly hot, after I've lost almost all strength in my arms, while needing to caution other motorists of an unsecured load, while running an electric cooler through the power port, then trying to light a cigarette, all while AC/DC blasts at max volume through the radio.
Assuming the alternator has no efficiency loss at all it's rated for 130 amps, so once again I'll have to find a means of supplementing it either with an AGM battery or just upgrading the alternator to something from Mechman, which I don't really want to do given how much they cost, and I want to minimize engine drag, but it would be the most elegant solution to be fair.