I was going to go this route but can't drain the 3 arm's I have even though they are group 24's.
I dont get your plan Mac...charger for quicker charges when you fish a lot? 200ah is a lot of juice.. you really think you are going to run that down fast?
Keep in mind some days I'm spot locked 10 hrs and even I can't kill 3 small arms.
I used to burn up my 31's in about 6-7 hrs of trolling on my Lund.
They were 100ah.
So I added a pair of 24's to them in parallel, which were about 60ah.
So I then had a total of about 160 ah and never ran out after that.
The Lund was only 16.5'.
My Trophy is 21', wider by about a foot, and weighs about double the Lund.
I'm going with 36VDC now, instead of the 24 that was on the Lund.
Like Geoff said, my new 36V, 200ah unit will only weigh 121 pounds according to the supplier.
If I matched the ah in lead acid units I would need six 31's at about 65# apeice for almost 400#.
Like most all batteries, they like to be charged slower rather than faster.
So normally I'll use the 8amp charger.
But when we take our fishing trips we fish long hard days every day and will burn up more battery and have less time to recharge.
So then we will use the 20amp charger.
I will probably never need 200ah, but I would rather have more than needed than not enough.
Also like Geoff said, I don't want to chance not having enough juice at the end of the day to auto-stow the Ulterra.
I paid only $2600 for 3 chargers, the 36V, 200ah battery, and the bluetooth opion to monitor things from my smart device.
Go price Dakotas or others for a comparison.
(They don't even offer 200ah units BTW)
I got a really sweet deal.
Now if the battery would only show up.