T&T: 110vac

[JHWardJr at aol.com]

Jim - Wow!  you have done this kind of thing before.  And beneath  that, 
you know your schtuff!  Thanks for the primer.  Arild also  weighed in (he's 
an electrical guru) and outlined the challenges.  
 
I am dropping the idea and will either go to a belt-driven 110vac generator 
 (I still like the idea of direct generation) or bite off on a 1500 watt 
inverter  setup.  The main use would be to enable using the 110vac cooktop 
and/or one  of the A/Cs  (all ~15 amps each) when en route or when at anchor if 
my  genset goes tango uniform.  An inverter will do all the lighter stuff 
and  one of the main uses - keeping my reefer cold.  FYI - I am doing a power 
 survey courtesy my Kill-o-Watt and confirmed my apartment-sized home 
appliance  reefer draws ~150 watts and consumes 1 kwhr over a hot summer 24 hour  
period.  Add 50% for more opening/closing/cooling beer and with inverter  
efficiency of ~80% I calculate a need of 156 amp-hours per day on my house  
battery(s) for this alone.  Add 3 hours of movie time (teenage  daughters!) 
at 150 watts and 4 hours of 50 watts total lights (I have  fluorescents and 
LEDs on my 110vac system) and I need another 68  amp-hours.  With 50% design 
point discharge, I need  550 amp-hours of  storage.  ASSUMING - no recharge, 
which is not accurate.  When  cruising I'll charge the batteries with the 
engine alternators (100  amps available) and when cooking (one hour if my 
cook does it right) I will run  the genset to power the heavy loads that can be 
time shifted and charge the  batteries (only have 30 amps of charging off 
the 110vac system,  though).  I am probably going to get two deep cycle type 
31s (easy to  handle and cheap at Walmart) for 200 amp-hours and see how it 
goes. 
 
Sound logical?  
 
Thank you for spending the time on this!  Jim 
 
In a message dated 7/8/2009 11:04:29 A.M. Eastern Daylight Time,  
gilwellbear at gmail.com writes:

 
As  another poster suggested, there are machines made to produce 110vac, 
belt  driven, mounted off-engine.  I would think that would be the way to  go 
in pursuit of this idea.
 
Jim
 
Peg and Jim Healy aboard  Sanctuary,
currently at Rock Creek, Pasadena,  MD
AGLCA # 3767
MTOA #  3436


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