Re: Making my own portable AC power supply
Posted: Mon Jun 29, 2009 8:16 pm
No longer valid
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If he had been talking about Air Conditioning, I might agree.dicion wrote: EDIT: Here's the cheapest 2000W True Sine Wave inverter I could find:
http://www.invertersrus.com/sk2000-112.html" onclick="window.open(this.href);return false;
The BETTER option is to find a 12VDC Air Conditioner. They exist, mostly in a roof-mount setup, for RV's and such, but I have seen them in standalone. These use a DC motor, and will not require any inversion, and therefore, no efficiency loss!!
Can you not set that model up to isolate the starter circuit on the Yellow Top, and have it always and only powering the starter? It eliminates the switch, while still guaranteeing you the power to start the engine and charge both.Locksmith wrote:If the main battery gets low or goes completely dead, I can flip a switch on my dash and combine my backup bettery and instantly can crank the engine (no jumper cables needed).
I realize you are planning to use the "wall wart" ac chargers for your cell phones and laptops. But it gets way simpler if you buy the DC cig lighter style plug ins for your devices. Then you need no conversion, and subsequent extra loss of storage. A small solar panel can then be your constant charger.Russell wrote:Ok, you guys are mixing up Air Conditioner and Alternating Current.
I'm talking about my own portable alternating current system. Not air conditioner.I just want to run cell phone chargers, laptops, and a small box fan.
It's not camping if you have an air conditioner in your tent!
So.. first you'll need to find the wattage requirements of the fans. This is harder than it sounds. Consumer electronics are required to be rated to the MAX amount they will ever pull. Since these fans are AC motors, the rating on them will more then likely be their start-up surge rating, not their running rating. If you have a current clamp to measure how much its using while running, that's the best way, or even plugging it into one of those kill-a-watt things will work too.stevie_d_64 wrote: 2 fans, at night, to keep the air moving in our bedroom...
1 surge protector/power strip to keep our cell phones charged up (overnight)
And on that power strip, I would still like to be able to run the laptop on power and to keep the batteries on this thing peaked...