Bruce,
Your proposal should work but, here are a few things to consider. Lead
acid batteries should normally not be charged at a rate greater than 20% of
capacity. Group 31 batteries usually have about 100Ah of capacity so lets
assume that your house bank is 200Ah and 20% is 40 Amps. Your start bank
would be 20 Amps. Now if you were to go cruising and drained your house
bank to the recommended max discharge of 50% or 100Ah then when you pulled
in to the marina you would be limited to the charge rate of whatever
charger you had. A 20amp charger would take ~5 hours. There are some
inefficiencies at the top end so lets add 2 hours for a total of 7.
Imagine if that was a 10amp charger. You be waiting 10 hours +2 for a
total of 12 hours. Your 12 amp charger isn't going to be much faster. If
this is all fine for you then you'll likely be happy with the setup. You
should also consider the loads which you'll be running while charging. If
you stay aboard for a night then you'll be using the entertainment, lights,
fridge, water, etc. The loads add up and take away from that which is
going to charge the batteries.
I have been satisfied with my ProMariner P-Nautic 1260. It charges my
400Ah bank on one of three channels and my 200Ah bank on another.
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On Mar 31, 2017 4:42 PM, "Bruce Whitmore via CnC-List" <
cnc-list@cnc-list.com> wrote:
Hello all,
Our 1994 C&C 37/40+ has 2 battery chargers. There is also a ProMariner
ProSport 12, Gen 3 which is currently hooked up to the house bank,
comprised of 2 Series 31 lead acid batteries. It was originally hooked up
to one gel cell and one lead acid (I know, *wrong*) and was set to the gel
cell setting. Now that I have reverted back to solely lead acid, I have
changed it back to charge on the lead acid setting.
One 50 amp model, which is clearly original equipment, and hums when it is
on. Not my favorite noise, but maybe that's just me.
In the pile of stuff left behind by the P.O. is a Guest Charge Pro 2611A,
10 amp charger (5/5). It seems to work. Considering the solid-state and
quite nature of these, If I connect the starting battery (also a Series 31)
to the 10 amp charger, and leave the ProSport 12 connected to the house
bank, 1). Would this provide sufficient charging power? 2). Is there a
reason to keep the old 50 amp unit? That one, in addition to humming,
takes up a lot of space which I could use for additional storage.
Thanks!
Bruce Whitmore
(847) 404-5092 (mobile)
bwhitm...@sbcglobal.net
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