Replacing Batteries.

[Stevan47]

While on the subject of batteries/chargers, etc: I am in the process of acquiring replacement batteries for my vessel. The existing two batteries (start & house) have been in situ now for over five years (manufactured Feb 12), without any dramas. Recently, I experienced some starting difficulty, while running the engine up on the trailer, however after reconnecting to shore (house garage 240V) power and giving it 24 hours to settle down, the engine started fine. My deduction is then that the batteries areprobably on their way out, after all this time. Interestingly, the Charge Indicator window in the top of both batteries is still 'green'.

The current batteries are sealed, lead acid, maintenance-free (SMF) type, so they have provided good service. The charger, which was replaced under warranty about 18 months ago, thanks to Ranger Tugs, is a ProMariner ProNautic 12-20P model. What a great piece of electronics too - marvellous device.

I have decided to buy two identical capacity, marine-specificlead acid batteries, but instead of sealed maintenance free (SMF) I am going to go with the standard lead acid, with vented caps, where I can visually inspect fluid level and top up with distilled water as and when required.

My question: do I need to re-select/programme the charger to accomodate the new batteries, noting the originals are sealed, whereas the replacement batteries are not (flooded...?)? Sounds like common sense, however there is provision on the charger panel for selection of 'Sealed' or 'Flooded' battery profiles. On page 18 of the ProNautic operating manual it mentions, under 'Programming' and 'Selecting Battery Type', selection of battery type and charging profile.

Would appreciate thoughts and suggestions. Regards, Stevan

 

[knotflying]

Take a look at your charger settings or manual. There is usually a setting for flooded, AGM or sealed.

 

[Cutwater28GG]

the promariner has a switch to go from AGM to non AGM as the charging rates are different.

note you must change all batteries to. you cannot mix chemistry as there is only 1 charger. so either all AGM or all lead acid non glass mat.

if you are after the AGM's the factory puts in the boat Amazon has them with the best deal on shipping around

https://www.amazon.com/gp/product/B0088L5AKS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

 

[stwendl]

I actually started a new thread on that but there was no traction. Instead of lithium you might want to consider carbon foam batteries. B have like agm but have none of the discharge problems. They can be discharged as o 80 or 100 percen without the damage that happened to lead acid. Developed for the military but now available