Lithium Batteries? School Me , marine/boat applications!

[Salmon Seeker]

Its just a 20hp outboard with a backup pull start so im planning to run this battery until it doesnt work anymore. the voltage drop killing the sounder is annoying though so im thinking just a separate source for the sounder.

 

[abl]

You should contact Rite Angle Marine in Victoria, they gave a very good talk about batteries and solar chargers at Sidney Anglers meeting last month
WWW.riteanglemarine.com

 

[BC Coast Pilot]

of 9/26/2022, Mercury has issued Service Bulletin 2022-19 stating that the listed engines will be permitted to use a Lithium Iron Phosphate Battery that is designed for engine cranking, as long as it meets the listed specifications:

-2.1L 75-115hp Fourstroke, ProXS and SeaPro Models
-3.0L 150hp Fourstroke, ProXS and SeaPro
-4.6L V8 and 3.4L V6 175-300hp Fourstroke, ProXS, SeaPro and Verado Models
-2.6L L6 200-400 Pro and Verado Models
-7.6L V12 500-600hp SeaPro and Verado Models.
-NO other engines approved at this time.

Minimum Specs Required:

-Chemistry/Format: Lithium IRON Phosphate designed for MARINE CRANKING USE.
-Minimum Cranking Amps: 800A for 8 second minimum @ 20 Degrees F
-Peak Charge Acceptance: 165A at 20-130 degrees F for one minute
-Max Charge Alternator Size: 150A at 20-130 degrees F
-Max Charge Voltage/Alternator Output: 14.8V
-Reserve Capacity (RC25 @ 80F): 135 Minutes
-Ingress Protection (IP rating): IP67 or greater.

Cautions that use at temperatures below 32F may require additional equipment such as a battery heater.

Bulletin also lists a Relion Battery that has been evaluated and meets the above requirements: RB100-HP.

 

[zurk]

hmm...lithium on a boat.

 

[Fishing?]

I have been thinking about this too.

I used to just use a Canadian Tire Nautical battery for everything, cars and boats. They lasted for years but the last couple I bought only last a year or so, less lead maybe.

ditto

 

[kaelc]

This 140ah battery looks pretty good. I could see it replacing my house and starting battery and then just using my emergency starting pack as a back up.

https://www.litime.com/products/12v...PJu0QjlceWz9b1aovqv7Hri2oFkU2BYIvR2y5qucBb6zf

Marine starting battery plus deep cycle performance, LiTime dual purpose battery offers 900 CCA, supporting crank up max.225 HP fuel powered marine outboard motor. PLUS, battery heating pad for use under extreme cold weather and Bluetooth 5.0 for easy battery status monitoring just through a tap on the phone.

 

[Wild Bill]

This 140ah battery looks pretty good. I could see it replacing my house and starting battery and then just using my emergency starting pack as a back up.

https://www.litime.com/products/12v...PJu0QjlceWz9b1aovqv7Hri2oFkU2BYIvR2y5qucBb6zf

Marine starting battery plus deep cycle performance, LiTime dual purpose battery offers 900 CCA, supporting crank up max.225 HP fuel powered marine outboard motor. PLUS, battery heating pad for use under extreme cold weather and Bluetooth 5.0 for easy battery status monitoring just through a tap on the phone.

Ouch! $629 US... I would still prefer SLA for cranking and a seperate house battery. Costo 24 or 27 series depending on engine size are a great option as well as 31 series as used in construction equipment are inexpensive and what I use for the windlass battery and the crank battery.
House battery I love Lifepo4 and built 690 ah for my boat but 100 ah batteries are getting pretty inexpensive. Charge off the crank battery with DC/DC converters and solar.