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Thats kind of what I meant to ask. And what I was wondering is if you can use the same charger that vexliar uses. It has a green light when fully charged. I was thinking a two battery set up. And that LED meter, wouldn't it always read 12volts??? Sorry I am confused on that one.
Got out yesterday and used the box. It worked amazingly well and the 6" strip of LEDs is awesome! Made a few changed though. Used the U shaped ends to connect to the posts instead of the loop ends.Pain in the rear taking wingnuts off and on. Especially in the dark, which brings me to the second change.When you disconnect at night you are plunged into darkness. Not anymore!!!!Its a lot brighter than what the picture shows.Waiting on my amazon order to install a separate switch for those lights. The journey continues...
I'm trying to get a rough idea on how long a battery will last based on estimated draw. Found some formulas that I think should get me close. Please let me know if its off.For me to run the full roll of LED's, which is 15' long. Amazon tells me its 12v 24watt.Watts is the fundamental unit of power and watt-hours is the energy stored. The key is to use the watts you know to calculate the amps at the battery voltage .For example, say I want to run the 24 watt 12V light strip for 24 hoursWatt-hours = watts * hours = 24 watts * 24 hours = 576 watt hoursSince watts = amps * volts divide the watt hours by the voltage of the battery to get amp-hours of battery storageAmp-hours (at 12 volts) = watt-hours / 12 volts = 576 / 12 = 48 amp-hours.If you are using a different voltage battery the amp-hours will change by dividing it by the battery voltage you are using.Since i'm running a 6' section of LEDs we will say its 12watts. And the power box is 12v 36ah. Ideally I should get 36 hours of continuous use of the LED's.This math gets real easy since 12 watts/12 volts = 1 amp1amp * 24 hours - 24 amp hours1amp * 36 hours - 36 amp hours
Done for now. Who knows what I'll end up changing after I use it more.