>Henry,
>That's interesting. I wonder if the Statpower 40 unit (as opposed to
>the 40+) is designed differently regarding fan cycle times. I have the
>older Statpower 40. Maybe they changed the program that runs the fan
>in the 40+.
Good question. If you find out let me know!
>
>I've never seen the 40 amp LED illuminate.
I routinely discharge my house bank to less than 50% charge state and run
about 50% of total capacity. The TrueCharge will kick out the 40 amps for
at least a portion of the charge cycle for my usage. From 80 to 100% bank
charge state, the charger has diminishing returns. At the 50% level the
bank will absorb about 25% of the bank capacity without shortening battery
life. For my golf car batteries that means that I could charge at up to
55-60 amps at the highest rate.
The TrueCharge 40+ lets me recharge the 100 amp-hour that I use in about 3
hours. When I'm boondocking that means a Onan run of about 2 hours every
two-three days - unless I'm using the PC heavily.
My fan will sometimes run
>when only outputting 20 amps. Sometimes it only runs for about 30 seconds
>then shuts off. I have the unit installed vertically in the electrical
>compartment
>with 4 AWG wire going back to the batteries.
Vertical is the preferred orientation since it improves convection cooling,
so that's a plus for you.
So there should not be any
>problems with my installation.
>
>I would expect the fan to run when outputting lots of current. But it will
>come on just when I have 2-3 interior lights on (plus the fridge is running).
Are you using the original fridge? If so, the draw is pretty high. I
measured it last summer but don't remember the draw (about 25 amps I think).
I've gone to a 3-way fridge to extend boondocking and allow me to keep
things cool using the alternator output.
Good luck,
Henry
Henry Davis Consulting, Inc / new product consulting
PO Box 1270 / product readiness reviews
Soquel, Ca 95073 / IP reviews
ph: (831) 462-5199 / full service marketing
fax: (831) 462-5198
http://www.henry-davis.com/ http://www.henry-davis.com