Battery charger recommendation for winter

minj

Seaman Apprentice
Joined
May 6, 2023
Messages
39
Good day,
Winterizing is complete Now I took my battery and brought it home.

What should I be using for charging the battery?
  • Battery Model: G27DC.
  • Liquid acid-lead battery.
  • Voltage: 12 V.
  • Capacity: 105 Ah.
  • Reserve capacity at 25 A: 180 RC.
  • Marine Cranking Amps: 750 MCA.
I was looking at this: Noco Genius 10.

Is this what I need? Do you have any other recommendation?
Can the battery stay plugged to this for 8 months?
Not recommended to keep this charged in a home, correct? Should be outside in a shed?

Thank you
 
Last edited:

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,083
Good day,
Winterizing is complete Now I took my battery and brought it home.

What should I be using for charging the battery?
  • Battery Model: G27DC.
  • Liquid acid-lead battery.
  • Voltage: 12 V.
  • Capacity: 105 Ah.
  • Reserve capacity at 25 A: 180 RC.
  • Marine Cranking Amps: 750 MCA.
I was looking at this: Noco Genius 10.

Is this what I need? Do you have any other recommendation?
Can the battery stay plugged to this for 8 months?
Not recommended to keep this charged in a home, correct? Should be outside in a shed?

Thank you
The trick is to get it (them) charged back up the quickest possible.

Replaced my Vintage 10 amp Diehard charger with a Schumacher SC1304 two years ago. It's a 15 amp/3 amp charger that supports Gel, AGM and lead acid battery charging.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,585
I use a NOCO 3-bank charger for the boat. works fine.
 

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
12,692
I have a Genius10 and it works great even the battery repair function which I used once
 

minj

Seaman Apprentice
Joined
May 6, 2023
Messages
39
I have a Genius10 and it works great even the battery repair function which I used once
Just got the Genius10. Do I simply set it on 12V and let it sit for 10 months until next season?
 

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
12,692
No i would charge till that green light is solid and that’s it. If you want you can put the charger on it about every 3 months or so. Should be no load on a stored battery!
 
Last edited:

cyclops222

Lieutenant
Joined
Mar 21, 2024
Messages
1,319
All of us old timers have read about these Trickle Chargers failing. And that cooks the battery to death by next spring. They are made all over the world. As cheaply as possible.
I try to check my batteries, hopefully, every month.
Oh well.
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,090
I fully charge my batteries then put them on a batter maintainer over the winter. I normally get extra life from cheap Wal-Mart batteries, current ones are almost 6 years old, gonna c retire them once this season is done ..
 

cyclops222

Lieutenant
Joined
Mar 21, 2024
Messages
1,319
Almost ALL trickle chargers will last FOREVER.....................
IF you FULLY charge up the battery on a FULL SIZED charger and then refill any low water cells to the correct level.

NEVER NEVER EVER connect a Trickle Charger to a .......even slightly run down battery !!!!!!!!!!! Best way to have that tiny charger to run in a OVERLOADED condition. Many will die every time.
ONLY YOU can save your crappy recharging system !! (y)(y)(y)
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,090
All of us old timers have read about these Trickle Chargers failing. And that cooks the battery to death by next spring. They are made all over the world. As cheaply as possible.
I try to check my batteries, hopefully, every month.
Oh well.
In years past many Chinieusm built trickle chargers were junk. About 15 years back I switched to Battery Tender brand and never an issue. But I buy the maintainer units, not just the trickle charge units. According to many battery mfgrs, a charger of at least 1.5 amps is suitable for batteries that that still have 75-80% of charge left is suitable. My two neighbors are old car collectors and have at least a dozen Battery Tenders between the two of them, just to keep there batteries in top condition and never an issue with them.
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,083
Don't own a trickle charger.....never have.

Can live with the 4-5% self discharge in the 3-4 months the equipment sits idle.

Charge the batteries up when I back the boat into the barn in December.
Throw the charger on them the day before Spring start-up.

Use the same procedure for all the LA batteries on the farm.......tractors, golf cart, ZTR, electric (solar) fencers, etc.

1729706546024.png
 

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
12,692
1) never leave a battery charger un-attended, if there is a malfunction you won't know it till something bad has already happened.
2) check what voltage your charger is actually charging at, I had an older Schumacher that was charging at 16.5V. I would have not known unless I checked.
3) if you have to leave a battery on a charger constantly for it to stay charged then the battery is defective. Doing so can actually mask a bad battery. A good battery should tolerate at least 3 months of sitting idle, assuming no load on the battery and it was fully charged before being stored.
 

cyclops222

Lieutenant
Joined
Mar 21, 2024
Messages
1,319
Post # 17 is what I have to do each May 1 to October 5. I join a bunch of seniors for a summer of fishing. I built my own 13.5 vdc 1 amp constant battery maintainer. 13.5 vdc in a 55 F basement WILL ALWAYS prevent Sulfating ( Lead Rust ) on any lead plates from forming.
The charger uses a I C device that is protected from thermal overheating & power failure restarts. ! died yesterday. I built 4 spares with polarized connectors. NAPA said their cheapest size # 24 battery is now about $ 189.
Do not want to cook batteries at those prices.
 
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