I have a 2003 420 Sundancer with...

[MARK25]

I have a 2003 420 Sundancer with gas engines. Over this weekend had to change both port batteries, as 12v lights were flickering, 12v gauge inside was pulsing (11.6 to 12.3VDC). Tuned off battery charger, checked batteries, port side read 11.6vdc., srtdb. read 12.6vdc. With new batteries panel meter still showed only 12.4vdc. Checked all batteries with charger on port 12.2vdc, srtdb. 12.6vdc, gen 13.4vdc. Looks like I need a new charger. I can not find any reference numbers for the charger, any ideas or replacement info. Have not called my local Searay (Marinemax) yet, closed on Sunday 

[Capt__Pete]

If you do need a new charger here is the info on the one I put in last year.

MasterVolt 44010500 ChargeMaster Battery Charger, 12V 50A, 3 Banks https://www.amazon.com/dp/B007D27LYQ/ref=cm_sw_r_cp_tai_huk-EbAJAEX3F

[MARK25]

Thanks for the info and the link Capt. Pete

[Pigpen]

I replaced one of mine with a ProNautic by Promanier. It’s a 24 volt, but they make several 12 volt

[Big_mike1]

It’s a 40 amp charger 12 volt they make many brands Searay uses charles

[Big_mike1]

Here’s one on eBay used

[MARK25]

Thanks to all for their info. I replaced the old charger with a Promariner 1250P. Back to boating

[101Marine]

Voltages when charging for both shore power and engine alternators should be around 14.4v at the battery. Dash gauges should read 14 or so. A 12v reading is dead flat. A fully charged battery is 12.8v. A charging battery should be upto 14.4 but can float between 13-14.4 if its a smart charger with Lead acid (wet) battery.