Relion Lithium Iron Phosphate vs Lifeline AGM Batteries

March 01, 2019

Relion Lithium Iron Phosphate vs Lifeline AGM Batteries

   Three years ago we had a customer come to us saying, "I want to try the new Relion's Lithium Iron Phosphate battery!". We reluctantly installed our first lithium bank, to the exact parameters that the manufacturer required. We stayed in contact with the customer, to insure all systems were operating properly. 
Now 3 years later, the customer still tells me it's the best upgrade he has done on his boat. Till today we have done dozens of upgrades, with nothing but good experiences. 
I figured I would take one of our installed and break it down. 
Starting with capacity, this boat had a total of 900 amp hours at 24 volt, which gave him around 315 amp hours usable. 
After the upgrade, they jumped to 720 amp hours usage, more than doubling there usable capacity.
The charts below are voltage drops at different rates over time. As you can see, the Relion holds a much higher for longer.
Going from 1,428 lbs to 498 lbs is significant, when weight and space are limited on a sailboat.
The charts below represents Cycle Life. The Lifeline shows 1000 cycles to 50% state of charge. The Relion show 13,000 cycles to 50% state of charge. 
No battery is inexpensive, but when you break it down to cycles over time, there is no comparison. 
    In conclusion, this technology is still new, but proving itself everyday. It is important to make sure that your electrical systems are properly evaluated before just swapping AGM's for Lithium's. There are many factors to take in account like alternators, battery chargers, cabling, and any other battery charging source you might have on-board.