Timely discussion. I'm toying with the idea of going from a 40A to 70A or 100A alternator on one of my mains, to charge the house bank (430AH) quicker. Watching my 100A charger
output, I note that it rarely actually gets above 70-80A, and then only for a short time. But a 100A alternator with smart regulator
is only $50-$70 more, and I'd hate to regret paying a few extra bucks some day.
There's also the issue of belts and wiring
. It seems 100A would be pushing it, while I'd probably be fine just dropping in the 70A.
And then there's the cost. Compared to an automotive alternator, pretty much double it and add one zero to get to the price
6 series kit. I wish there were a cheaper alternative, but it sounds like that's the preferred brand.
All this for a back-up method of charging
up the house bank may not make sense. It'll charge fine on the charger
and genset. It'll charge fine on the mains if I run for 5-7 hours to the next anchorage. For the same money
, I could buy a Honda
2K to run my 100A charger if I ever lost
, or chose not to run, the 7.5KW Onan. Then I'd have backup 120VAC for other things, too.
Anyone see any flaws in my logic?