LOSSIGY 12V 100AH LiFePO4 Lithium RV Battery, Perfect for Solar System, Marine, 1280Wh 5000+ Deep Cycles, Built in BMS with 10 Yrs Lifespan

Likes. The amphour capacity of this battery seems to exceed rating. Charging at voltage ie MPPT & charge converter settings keeps battery cool and charges fast. The price of the unit to quality of product is exceptional. This unit is rated up to a 10yr lifespan so time will tell. Keep a eye on this battery because the merchant makes a already amazing price better especially on Black Friday/ Cyber Monday. I will be purchasing two more units to assist in future off-grid solar. The weight of these units are much lighter the. Obsolete flooded lead acid batteries. One draw back is charging at low ambient. Use best judgment mounting inside of RV basements. This space is heated and cooled but it is not recommended to mount inside a coach. Everything is fused in event of BMS failure. Unlikely being a 200a bms.

Bought one in April 2022 and here's what I like most about the Lossigy LiFePO4 200ah battery:1. Increased the electrical storage capacity on our RV by over 400%.*2. 20% lighter than the 50ah wet cell bank it replaced.**3. Fit perfectly in the battery box that formerly contained 2ea. 6V wet cells wired in series.4. No problem with operation in temperatures down to 27F.***6. Still reliable and showing no signs of deterioration after 14 months of heavy usage.7. Prompt and helpful responses from seller whenever I've had a question.NOTES:*The battery continues to put out 12 volts or more, even when remaining capacity falls below 15% (as measured by RV's coulometer). My 50ah wet cell bank, by comparison, would often drop below 12V when remaining capacity hit 30%. Useable capacity was therefore about 35ah whereas usable capacity of the 200ah Lossigy LiFePO4 is 170ah+.**Combined weight of the 50ah lead-acid battery bank that was replaced was over 60 lbs, or about 1.2 lbs per rated amp-hour. The Lossigy LiFePO4 200ah battery, by comparison, weighs in at only 48lbs. This equates to about 0.24 lbs per rated amp-hour - effectively less than 1/5th the weight per ah of the wet cell bank.***We've camped in winter conditions and watched anxiously as temperatures on the surface of the battery hit 27F (as measured by remote sensor). The Lossigy battery never so much as hiccupped (though I wouldn't want to push it much lower than 27F).NOTE: Worth considering with an RV trailer is the fact that standard tow vehicles rarely come equipped with a tow-battery charging system capable of putting out greater than 8 amps. This means 10 hours of driving might put 80 amp-hours back into your trailer's 200ah battery. The solution is a DC-to-DC charger that can bump the charging current up to 20 amps or more (I installed a model made by Renogy, but there are others). Also, a fairly robust solar charging system (mine is combination of Dokio arrays and MPPT charge controllers rated at 460 watts total) can keep you off the grid almost indefinitely without relying on a noisy generator.UPDATE: Questions show up on Amazon from time to time regarding low temperature protections for LiFePO4 batteries. I think the only way to safely use these batteries when ambient temperatures are substantially below freezing is to provide some source of heat, such as rechargeable heat packs placed around the battery (see Dnaleao hand warmers, for example). Also, insulating the battery box somewhat (I've added foam packing material under and on the sides of my battery) helps. Last year when I submitted this question to Junson Bty (seller of Lossigy LiFePO4 batteries on Amazon), they answered: "When the battery is charged at an air temperature lower than 32 ° F, the lithium ion activity inside the battery decreases, which will lead to the decrease of charging efficiency with the decrease of temperature (this situation is similar to some animals entering hibernation in winter), but this will not cause damage to the battery. It is recommended not to charge at low temperature for a long time."

I purchased 3 of these batteries about 4 months ago. I wired them in series for a 36 volt trolling motor. I was skeptical because the price was very cheap. Well it’s 4 months later now and I’ve discharged and charged them over 20 times with absolutely no issues. I troll hard and on a recent trip to Lake of the woods I got a solid 10 hours of trolling. That might not mean that much but my buddy had lead acid batteries of the same size and I got at least 3 more hours than he did and I pushed mine harder than he did. These batteries are worth every penny. I will review them again at the end of the season and keep you posted. I am not paid or affiliated with lossigy or anyone. I wanted to add I just got back from Cass Lake and I used these batteries very hard again. Trolling for at least 6 hours each night in wind and waves. Again no issues. Worth every penny.

Do your Boat/Car/RV the biggest upgrade possible and get rid of that old lead acid sealed 1940’s technology. This battery weighs half as much and lasts TEN TIMES LONGER!!!Lossigy customer service has been exceptional as well! I had MANY questions being a first time user and installer of a Lithium Battery into my Boat. Whether through the Lossigy provided email address for service, or through the Seller Feedback here on the Amazon App…I always received a prompt response.Update 9-22-24Unfortunately I was unable to dial-in the batteries, charging parameters into my current solar set up… Luckily any customer service as I stated before with this company is superior to all others… I was able to contact the seller upon which they created a free shipping label to return the battery, and then promptly issued a refund for the full amount of purchase with no questions asked.This is how ALL SHOPPING SHOULD BE!Thank you Lisa from Lossigy Customer Service Support!!!I’ll be back