SeaKnots

Hi All,

Advice on batteries--I am accused of being paranoid but!!!

I have a 43 two years old french built, sailed in Solent and south coast/channel Uk and had the lead acid service batteries replaced after 6 months under warrenty as they were not holding charge. replacement are Exide EF1453 proffessional lead acid 145 amp hr and two off. On investigation the Dolphin charger had not been set up for lead acid.

I am on a mooring and have a Rutland 413 wind generator which delivers 2amp in 20knots of wind. I also have a sonic anti fouling device (built from kit obtained from Austarlia) which draws 300 milli amps ie about 8 amp hr per day. Usually the wind generator keeps up with it but I am down at least once a week and run the engine if necessary. Have an Adverc voltage regulator with an 80amp Hitachi alternator. battery has never been below 11.9v or 60% capacity as measured by NASA Clipper battery monitor.

Last week the charge when topping up after a day at anchor with the fridge on --approx 70 amp hr--I noticed the charging current was only 60 amp for approx 10 min and then dropped off fairly quickly. Usually the charging current os 75 amp for up to an hour before it starts to drop off as the regulator cycles.

checked all connections etc and took specific gravity of cells. It transpired that the cells had stratified with 1.2 sg at top and 1.3 at bottom. can't get any reason for why they should have stratified and have been adviced to run charge at 14.8 volts (can do this by removing voltage sensing lead from regulator) and to gas the batteries for 30-45 mins which I am told will stir up electrolite and restore the return the batteryies to their normal capacity. All the normal precautions re gassing cells and removing tops and ventilating.

Any ideas on what could have caused stratification and whether gassing for a period will resolve and restore condition.

 

Don't really want the expense of fitting AGMs as these batteries are only 18 month old. Had thought of upgrading batteries after about 4 years not two.

Any advice or solutions gratefully received.

 

Michael Boyle--Barti Blue

Views: 125

Reply to This

Replies to This Discussion

The Exide EF1453 batteries are listed as starting batteries in the manufacturers literature.  If you're using them as your house bank that might be the root of your problem.

If your wind turbine is only making 2 DC amps at 20 knots and the boat is out on a mooring thats not helping the batteries either.  Especially if theres a constant albeit small load.  As far as overcharging them for 45 minutes to help stir up the batteries I don't think thats going to be of any use.  Most guides to equalizing batteries recommend an 8 hour time period.

I'm sorry to be so negative but I think you're going to have to change the batteries to deep cycle batteries.  A wind turbine that actually puts out some amps would be a big help as well.

Bill

s/v Veranda

Veranda422@blogspot.com

is the ventilation good where the batteries are ? when toping batteries off are you using sulfuric acid .......lead acid batteries come back to life [so to speak ] when drained and refilled with sulfuric acid

 

RSS

Latest Activity

Mike Brown replied to Wayne's discussion Farewell all in the group Beneteau 40 & 43
"CAEA5280-4642-4EB0-A37A-056724ADE37C.mov"
Wednesday
Mike Brown replied to Wayne's discussion Farewell all in the group Beneteau 40 & 43
"Wayne, yes I'm still out here. She's looking good and you'll love her. The 38.1 is a perfect size for 2 people with occasional guest (s). Plus she's a sweet sailing boat. I'll attach a short video of one I was delivering…"
Wednesday
Wayne replied to Wayne's discussion Farewell all in the group Beneteau 40 & 43
"Mike if you’re still out there here is the new boat before commissioning. Should splash by end of this week after 14 months of anticipation! Wayne"
Wednesday
John Hanrahan liked sam's discussion eyebrow salon window re-bed
May 12
John Hanrahan replied to sam's discussion eyebrow salon window re-bed in the group Beneteau 40 & 43
"Sam, I am just in the process of replacing both of my eyebrow windows.  I have the new ones from Beneteau and am talking with dealer in Florida re Bebeteaus advice. It would be helpful to talk to you about your experience. I have never seen…"
May 7
John Hanrahan posted a blog post

Cabin eyebrow windows

Good morning gang,I have received both port and starboard cabin windows from Beneteau for replacement as the existing leak and are badly etched. Beneteau has referred me to the dealership for installation but I'm having trouble getting a response.   Does anyone have any experience replacing these and any recommendations. JohnSee More
Apr 28
Kerim N replied to Randy Brown's discussion Beneteau 40 Black Mesh Window Covers in the group Beneteau 40 & 43
"Hello Randy, New to the group, going through the posts, I have come upon this thread.  I was considering tinting my windows of my Beneteau 43 with a darker tint, but I really like your idea.  So I will copy with…"
Jan 6
Kerim N joined CAN DRAC's group
Thumbnail

Beneteau 40 & 43

A place to exchange thoughts, ideas and discussions about the Beneteau/Oceanis 40 and 43 models.
Jan 6
ADVERTISE ON SEAKNOTS CONTACT US AT: 
candrac@sailforwater.com

© 2022   Created by CAN DRAC.   Powered by

Badges  |  Report an Issue  |  Terms of Service