More fun with 8D batteries
Posted: Mon Jan 31, 2005 11:55 pm
No, not beerguy again. His system is settled. It's insanely overcomplicated, and it my opinion he tore apart his boat for inconsequential gain, but whatever.
This time it's my father's boat. On with the rant.
I make a conscious effort to avoid sticking my head into his engine compartment, because it seems like I always get sucked in there for hours on end. For this reason, it was not until this past weekend that I learned of his 12V setup:
Twin diesel boat. Each engine has its own 8D battery. I know. Read on.
AC power is provided via shorepower, a 12KW generator, AND an inverter. The inverter has its own 8D battery.
That's THREE 8D batteries. Something like 200 amp-hours EACH, right?
The port engine's 8D is wired as the "house" battery for the boat's 12v system. Refrigeration, cabin lights, water pump, etc.
The average weekend-overnight drains this battery to the point that it cannot start the engine the next morning, requiring the use of a parallel-start device to make use of the stbd engine's battery, which has been sitting pretty all the while.
That's right.... the stbd 8D is used EXCLUSIVELY for engine starting. Never drained below 97%.
The inverter's 8D is enough to watch a movie on the tv/vcr and pop a bag of popcorn in the microwave, but that's about it. He's been thinking to add a FOURTH 8D because he's tired of needing to fire up the generator to run the battery charger.
Oh, by the by, the battery charger is not designed to support four batteries (the generator has its own group24 for starting), so it charges at least two if not three of these batteries via parallel wiring.
A total friggin mess. I didn't even know where to begin.
I ought to at least loan him my 12V Bible or some other chunk of my library, but I think I'd probably find myself down in the engine compartment for hours on end......
This time it's my father's boat. On with the rant.
I make a conscious effort to avoid sticking my head into his engine compartment, because it seems like I always get sucked in there for hours on end. For this reason, it was not until this past weekend that I learned of his 12V setup:
Twin diesel boat. Each engine has its own 8D battery. I know. Read on.
AC power is provided via shorepower, a 12KW generator, AND an inverter. The inverter has its own 8D battery.
That's THREE 8D batteries. Something like 200 amp-hours EACH, right?
The port engine's 8D is wired as the "house" battery for the boat's 12v system. Refrigeration, cabin lights, water pump, etc.
The average weekend-overnight drains this battery to the point that it cannot start the engine the next morning, requiring the use of a parallel-start device to make use of the stbd engine's battery, which has been sitting pretty all the while.
That's right.... the stbd 8D is used EXCLUSIVELY for engine starting. Never drained below 97%.
The inverter's 8D is enough to watch a movie on the tv/vcr and pop a bag of popcorn in the microwave, but that's about it. He's been thinking to add a FOURTH 8D because he's tired of needing to fire up the generator to run the battery charger.
Oh, by the by, the battery charger is not designed to support four batteries (the generator has its own group24 for starting), so it charges at least two if not three of these batteries via parallel wiring.
A total friggin mess. I didn't even know where to begin.
I ought to at least loan him my 12V Bible or some other chunk of my library, but I think I'd probably find myself down in the engine compartment for hours on end......