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Lithium Batteries

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Engineerlt

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Lithium Batteries
« on: February 13, 2020, 07:44:21 am »
I was wondering if anyone has used or thinking about using Renogy Lithium batteries? The warranty is only 5 years but the dimensions of the 170AH battery (13.7" Long, 6,1" wide and 10.7 High) makes me believe they will fit into the battery compartment. Seeing as the lithium batteries require no maintenance like lead acid and can be mounted in any configuration, like laying them on there side and stacking them, remove the sliding tray and they will fit, insulate the battery box, add some heat mats with thermostat and your good to go.

If you can only use 50% of a lead acid battery and 80% of a lithium, plus the voltage curve of the lithium is more stable then lead acid you gain a lot of usable AH's. GC2 lead acid (2ea 6volt) has 225 AH's. x 50% = 112.5 usable AH's. The Renogy 170AH batteries x 2 = 340 AH's x 80% =   272 AH's a little better then double that of lead acid. Plus you can make them fit into the existing battery compartment.

I think I am going to do a little more research and then decide if I should take the plunge. If anyone out there has found another battery configuration that would work better and fits into the existing battery compartment please let me know, or if you have used Renogy batteries also please let me know.

Thanks
Lance

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donc13

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Re: Lithium Batteries
« Reply #1 on: February 13, 2020, 09:14:03 am »
There's other threads on using lithium batteries.  I recall the issues were cost plus needing a new converter/charger system.
You might want to search the forum and/or Google for the pros and cons.
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Don and Patti

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Ron Dittmer

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Re: Lithium Batteries
« Reply #2 on: February 14, 2020, 12:13:15 pm »
Hi Lance,

As an alternative to Lithium technology, you might want to consider AGM technology because they work with the current PC charging system.  You only need to set the system to AGM.

I went from two-12v wet lead acid batteries to two-6v AGM batteries and they made a monumental improvement in battery power reserves and also ease of maintenance with no more fluid checks or acid boil-overs.

Since my battery compartment was designed for 12v sized batteries, I had to ditch the slide-out battery tray, attach a steel plate to the battery compartment frame (doing so lowered the shelf for the taller 6v batteries) and slide the batteries in through the resulting larger opening.  Given they are 100% sealed like Lithium, the only time I need to handle them is when it comes time to replace them, so sacrificing the slide-out feature was an easy decision.  My two-6v AGM batteries are now 5 years old and are still performing extremely well.

I bought my batteries from Sam's Club, $180 per battery.

CLICK HERE to get to my write-up on the modification.  It includes some pictures.  I have since labelled + and - on the side of the batteries for a quick reference on how to hook up a charger or jumper cables.
« Last Edit: February 14, 2020, 12:19:50 pm by Ron Dittmer »
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Re: Lithium Batteries
« Reply #3 on: February 14, 2020, 08:42:25 pm »
How do you reset the system for AGM batteries?

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Ron Dittmer

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Re: Lithium Batteries
« Reply #4 on: February 14, 2020, 11:20:12 pm »
How do you reset the system for AGM batteries?
Each inverter/charger has it's own method.  The owner's manual walks you through it.  Some require repositioning little jumpers while others have little switches that you flip into a different arrangement.  They are usually accessible through a removal panel, but sometimes are in plain sight.  It may sound complicated for the novice, but it really is simple to do with the manual in-hand.  If you don't have the manual, you should be able to locate a soft copy on the internet.  Just search for your inverter/charger brand and model number.
« Last Edit: February 14, 2020, 11:24:48 pm by Ron Dittmer »
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Engineerlt

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Re: Lithium Batteries
« Reply #5 on: February 15, 2020, 03:52:24 pm »
Hello Ron
AGM batteries are an option but I already have GC2 6 volt batteries (flooded). The only benefit I would get from AGM is that I wouldn't have to add water, the amp hour capacity is the same 225 AH's. As for the converter/charger I was already looking at changing it, seen some possible issues with the Parallax Series 5300 55 Amp one that came with the coach.  I thought I would upgrade to a Progressive Dynamics Inteli-Power 4600 Series, 60 Amp. It has, Charge Wizard 4-State charging system built-in and is good for all types of batteries. The only down side to all of this in my mind is cost..... I guess I can eat ramen noodles and macaroni and cheese for awhile to offset the cost....

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Ron Dittmer

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Re: Lithium Batteries
« Reply #6 on: February 15, 2020, 09:19:42 pm »
Hello Ron
AGM batteries are an option but I already have GC2 6 volt batteries (flooded). The only benefit I would get from AGM is that I wouldn't have to add water, the amp hour capacity is the same 225 AH's. As for the converter/charger I was already looking at changing it, seen some possible issues with the Parallax Series 5300 55 Amp one that came with the coach.  I thought I would upgrade to a Progressive Dynamics Inteli-Power 4600 Series, 60 Amp. It has, Charge Wizard 4-State charging system built-in and is good for all types of batteries. The only down side to all of this in my mind is cost..... I guess I can eat ramen noodles and macaroni and cheese for awhile to offset the cost....
;)
Ron (& Irene) Dittmer