Lithium batteries make sense only for weight
savings. At some point the crazy high costs will come down and these batteries will become widespread.
I know some catamaran owners with large banks of these. Weight
is important on a live-aboard catamarran. The energy storage is dense also. However , I would worry about a fire in a boat-- all that slamming around. It would be no fun fighting a fire in a lumpy Gulf Stream crossing. It seems like a formula for fatality. Likewise travel in a camper can get bumpy.
On the other hand installing one of these in a car or truck with solar
charging could eliminate the need for an alternator and increase fuel economy and range.
Having identical battery types in both TV and camper could allow more flexible charging methods and greater capacity also.
If you did need lots of capacity. They do make sense. I could fit an insane amount if storage in my camper--900 AH @ 276 lbs plus cables. I could have two in my generator
compartment and one in the battery box. This is silly because I'd run out of water or propane
long before energy. Not to mention the cost would be twice the value of my camper.
However it is interesting to examine all the extremes before making a decision. 900 AH would not provide enough power for Air Conditioning
, however I bet some obsessed fellow in a large motorhome is trying to use massive solar
array power for air conditioning
I seriously considered getting one 92 lb 300 AH lithium about six months ago. The weight savings would allow me to carry more water. The cost stopped me, but I sometimes regret the decision. I could have carried an extra 19 gallons of water for the weight savings. I now can carry up to 32 gallons of water. My goal for boon docking is to be able to carry 60 gallons.
So, I now have two 118 lb 200 AH batteries with 200 AH useable and in an emergency could use 300 AH. They work well and offer reduced fire hazard. The cost was less than 1/3 of the largest lithium battery.
I considered getting one 31 lb 100 AH lithium. It would have been a huge weigh savings (88 lbs weight savings compared to one 200 AH AGM or 205 lbs compared to two batteries): it would have been slightly inadequate for my needs, but manageable with occasional shore power charging and cost about what I paid for the two AGM batteries I bought. It might have been fine as I suspect these lithium batteries can accept more charge in the last portion of the charge-- but not with my existing charge controller.
I also considered the carbon foam batteries and might have gotten one of these if it was in an 8D shape format. I did not want to try to stuff a pair in or have to fabricate a custom battery tray.
My goal is to make my camper more off grid full time capable--including four season comfort.
A larger inverter, a big lithium battery, and more solar panels would allow me to run more AC loads like a satellite TV w/DVR 24/7, a DC fridge
, and also handle running my furnace
and electric blanket more heavily. As a bonus I could also carry more water and perhaps distill water.
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