Mike, Jack, Dee, & George,
Somehow I was thinking of a lot more complicated switch array...
Senior moment thing...older I get, the more I forget...this isn't the first wiring work I've ever done...
I missed the power supply rating, but that's great.
I was rather concerned with running the (less than cheap) LCD television off the charger, but now it looks like it won't hurt it.
Or is that correct?
If the draw is larger than the 6 Amps (5.833, from the 70 Watt stated output...though it also says 5 Amp max??) the charger/PS. puts out, then as you stated, it will draw reserve from the battery bank.
If it draws it too low, will it not "starve" the TV of needed amperage, and do harm?
Perhaps this is stretching the scenario too far, as obviously I shouldn't draw off more than half the charge...
My calculations show that I'll need aproximately 13.68 Amp hours per day.
So, at that rate, drawing from a 105 amp hour bank @50%, I can reasonably expect to get three full days worth of power from the reserve (41.04 Amp hrs from the reserve of 52.5)
Do these calculations look right?
If they are, then there probably isn't a need for a power supply in addition to the charger...whis is really good, cause I can think of a lot of other things to spend the money on!!
Galley lights, 9.72 Watts=0.81 Amps x 1 hr=.81 Amp hrs.
Cabin Lights, 84.0 Watts=7.0 Amps x 1 hr=7.0 Amp hrs.
TV. 12.6 Watts=1.05 Amps x 2.5 hrs=2.62 Amp hrs.
DVD, 10.8 Watts=0.90 Amps x 2.5 hrs=2.25 Amp hrs.
Water pump, 24.0 Watts = 2.0 Amps x .50 hrs =1.0 Amp hrs.
Total Amp hrs needed per day is 13.68.
These calculations are slightly flawed in that the rated Amp draw on the pump is 5.0 The above Amp draws are actual, but the pump was spinning free, not actally pumping water, so, I may need to add 1.5 Amp hrs per day, or 4.5 extra Amp hrs to the three day total, which puts me at 45.54 Amp hrs.
Now, on another note;
If my two 6 Volt 105 AH. batteries won't supply enough Amp hrs for an extended trip, I can replace them with two 12 Volt 105 Amp hr batteries, and gain 52.5 Amp hrs of storage capacity, right?
I'll be doing some tests this weekend to see just how accurate the numbers are by running lights, etc to see how long the batteries will last.
And as a final note, I was concerned about the power draw from the TV. and DVD when they were not being used. (I have them both switched).
When doing the Amp draw tests, I found that the "at idle" draw of the TV, and DVD (both 12 Volt of course) was significant, at least in the finite world of 12 Volt storage batteries...
The TV draws 0.18 Amps = 2.6 Watts
The DVD draws 0.14 Amps = 1.68 Watts
Total of 4.28 Watts, 0.32 Amps
Though it only comes to 1 Amp hour used in a three day period, it amounts to a lot if you need that hour.