If you are choosing a battery for your boat or any marine use, then lithium batteries are the best. And this is so for many reasons. Lithium batteries compared to lead-acid batteries are far stronger, smaller, lighter, safer, faster, easier, greener, and more powerful. This is the reason why lithium batteries are ideal for your marine use.
It is less expensive to buy a lithium battery than a lead acid battery or an AGM.
It was lead-acid batteries that were the common and only option before. Because of toxic off-gassing, storage issues, maintenance issues, lack of efficiency and safety risks, the lead-acid batteries have become unsuitable for use.
Another advantage of lithium batteries is that it has longer usable amp house compared to others. Lithium batteries last twice longer than other batteries. So, there is a need for more batteries to have similar usage as a lithium battery over time. The weight of lithium is light and it takes less storage space.
If you use lithium batteries, then you will have these benefits.
Lithium batteries weigh have of the other batteries. There is not much space used by a lithium battery per usable amp hour. This means that there is more battery in less space.
With lithium batteries you can discharge down up to 10% or lower. Only 50% depth of discharge is allowed by other batteries. A high level of discharge will affect the overall battery life. Even with a high level of discharge, lithium batters are not much affected.
Lithium batteries are almost perfectly efficient. Both in and out, they allow the same amount of amp hours. For other batteries, there is less efficiency and when they are charging they lose 15 amps and with rapid discharging the voltage drops quickly and reduces the overall capacity of the battery. To run your boat air conditioner or water heater, you should use a lithium battery.
There is very little internal resistance with lithium batteries. Charging is quick because it of this lack of internal resistance. Internal resistance make charging other batteries take a long time.
Lithium batteris matain their voltage when in use. If you have electrical devices, then this is better and more efficient. Their capacity is the same even for heavier loads. This is very important for AC, electric cooking deives, water heaters, etc. that need a lot of power.
Maintenance is not needed by lithium batteries. And they are very safe. The battery pack is kept safe and under control due to its built-in circuitry. This is the work of its battery monitoring system. Battery monitoring systems are put in place by reputable lithium battery companies in order to ensure that the batteries are installed and configured correctly.