[C320-list] Batteries

[CARY DENNIS LOWE]

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> On Jun 4, 2019, at 4:12 PM, Troy Dunn <troutwarrior at gmail.com> wrote:
> 
> For me this is an incredibly easy answer.  If the PO already converted to
> 6V Trojans I would be really hard pressed to go back to 4Ds (either AGM or
> FLA). Here's why.
> 
> #1 Those Trojans are true deep cycle batteries and dollar per amp hour
> times number of cycles you are likely to get out of them, a better buy.
> #2 The 4Ds are incredibly heavy and therefore have high potential for back
> injuries.
> #3 To get to a similar quality and amp hour rating in a 4D
> configuration...you are stuck with AGMs (cha ching).  Others will argue
> that there are FLA 4Ds out there that come close, but really cost
> competitive 4Ds are hard to pin down on quality, cycles, and specs for 20
> hour rating...that’s a red flag.    That doesn’t mean those are bad choices
> for those of us stuck with 4Ds and not wanting to reconfigure for GC
> batteries at the moment, especially for the casual cruiser or club racer
> that leaves the boat mostly on the shore charger.    It’s a crappier chair
> to be sitting in than the one you are however...ask me how I know.
> 
> I’m not convinced I agree with the theory that changing your battery
> configuration may be a bad idea because you are set up for 6V FLAs and you
> might mess up the new batteries going back to 4Ds.  It implies you don't
> need to worry those things if you don’t reconfigure and I think that’s a
> bad idea.   Regardless of what you decide to do, you should understand your
> DC power system well enough to know if it is configured properly for
> whatever batteries you have in there, even if you go with identical
> batteries.  I think it would be a mistake to buy new batteries and assume
> your alternator, regulator, charger, and any other devices are properly
> configured.   Assuming the PO has this right to begin with is a really bad
> idea and could potentially negatively impact the life of an expensive bank
> of batteries you are about to spend some coin on.
> 
> So to sum up.  Here is my recco.
> 
> Replace the Trojans with identical batteries and learn about your charging
> systems well enough to ensure the correct bulk, absorption, and float
> voltage profiles are being delivered to your new batteries.  Never go below
> 50% SOC, and try to ensure you get back to full charge with each cycle.
> 
> For much much more info, read all the articles in the aforementioned
> marinehowto.com website on electrical systems and upgrades.
> 
> Good Luck
> 
> Troy Dunn
> Hull #514