Post by Admin on Aug 26, 2018 14:42:41 GMT
Oct 25, 2017 19:18:36 GMT @tinman said:
I want to put a lithium battery in my home made portable power system so I don't know what size lithium battery to get to power a 7.5 amp car polisher . I only use it on and off for 2 to 3 hours at a time not constantly !! Do I need to turn my solar charger on and off as the battery when it is fully charged ? Does Renogy have a charge controller for lithium batteries ? I just use it mostly for tail gating and tent camping ! Oct 26, 2017 1:49:23 GMT @rabird said:
their new waterproof controller claims to have several lithium profileswww.renogy.com/renogy-voyager-20a-pwm-waterproof-charge-controller-w-lcd-display-and-led-bar/
7.5A * 3 hrs is 22.5 ah, if flooded you'd at least double that and then some, lithium ?
Best to find the charge specs of whatever battery type you have and find a controller that matches or is programmable.
Lithium is a poor choice of a battery. Your going to need a much larger size system to do what your wanting to do... It's amazing what you can do with solar.. But there is a lot that you can't.......
No you don't need to turn off your solar... Keep it on as much as you can as that is the life of your batteries......
Oct 26, 2017 17:13:07 GMT @rabird said:
what are negative associated with lithium? I know of their cost.Oct 26, 2017 17:13:07 GMT @rabird said:
what are negative associated with lithium? I know of their cost.Do you have any idea on how many and how large of batteries it will take to do what they are wanting to do??? I doubt it but now I do...
See you have a very small solar system.. It's very different when you want to do something other than lighting a walk way...
Oct 27, 2017 1:04:48 GMT @rabird said:
can we get back to lithium and why it is a poor choice ?'Your going to need a much larger size system', much larger than what?
some lith don't want to be 'floated' or even stored @ 100%, just wonder why it's such a poor choice. Like a direct answer!
the few RVers I've heard about are enjoying them.
I'm thinking $1000 100ah lith(which version?), $200 100ah AGM or $100 100ah flooded would be about right. 100 watts of solar to recharge and maintain between uses.
if the opposite of wasting money is cheap, I'm all in. In '05 is spent $100 on 15w panel, worth every penny.
Sorry but I don't cut and paste...
I guess you will have to do like I did, do a search.......... It's amazing the information out there....
Oct 27, 2017 21:10:25 GMT @tinman said:
Thanks guy's I will keep using my 12v deep cell battery/ It may be heavier for a portable system but the battery does the job I want it too !! Thanks
Oct 27, 2017 21:10:25 GMT @tinman said:
Thanks guy's I will keep using my 12v deep cell battery/ It may be heavier for a portable system but the battery does the job I want it too !! Thanks
Jul 15, 2018 17:14:09 GMT Dragonfire said:
Lithium batteries are Superior to lead batteries, their only drawback is they cannot be charged when frozen.and they deteriate faster when overheated.Let's see, they weigh 1/3 of the weight of a lead battery and have a 80% usable drain, rather than 50%. They can be oriented in any direction, like an agm battery.
In a home situation where weight and off gassing is not a factor, lead batteries are just fine, except that pesky 50% usability. Where in a mobile application I can have 2 100 amp batteries that I can actually use 160 amp hours rather than 100 and it doesn't take up as much carry weight meaning I can have things other than batteries.
Now if you live in a cold climate then lead is definitely better for winter.
Prices, 100 amp hour battery
Lithium 760$
AGM 200-400
Flooded 100-200
Cycles
Lithium. 2000+
AGM. 1000
Flooded 500-700
Depending on your application and your budget and your cargo space/needs you can then choose your poison. Personally for my application lithium just makes more sense and the cost is slowly decreasing and the quality is increasing as well as the safety.
Jim
Lithium cost WAY to much when your trying to save money with solar....
Aug 22, 2018 19:50:01 GMT @tm56 said:
Lithium cost WAY to much when your trying to save money with solar....
Aug 22, 2018 19:50:01 GMT @tm56 said:
The money you save is only initial, in the long run you will pay more using lead acid or even gel. Lithium has 80% capacity compared to LA 50% weight is 1/3 of LA voltage is constant and instantly dropping soon as you apply load. Think of the old power tools that had nicad batteries, the longer you used them the slower they got till they wouldnt go anymore. Lithium goes full bore to the end. I use a 200 ah lithium in my rv with a 2000watt inverter, if I make coffee in the morning, it never even dims the lights and pushes right through. The batteries I had before these were Vmaxtanks (2) 200 amp sucker weighing 260# for the pair and talking up gobs of space, even brand new making coffee would drag the voltage down low enough the inverter would kick out. Worst $950 I ever spent. We all buy what we can afford but it comes at a cost. Nice thing about lithium is it doesnt matter when you charge them, they can be 50% 60% OR 100% it doesnt affect them, they still provide full power. BUT they aint cheap. If they others work fine for what you use them for than that is the thing to stick with but if you want superior power lipo4 is the way to go.You keep hawking those over priced batteries and I'll keep buying lead acid batteries and keep my money...
Anything I do with my system it never dims my lights either..... It depends on the system you have not the batteries...
Aug 23, 2018 1:29:47 GMT @tm56 said:
You keep hawking those over priced batteries and I'll keep buying lead acid batteries and keep my money...
Anything I do with my system it never dims my lights either..... It depends on the system you have not the batteries...
Yea I don't like LA either.... To much traffic for me.... LOL
Currently, the Voyager 20A, Rover20A-Li, and Rover40A-Li have a setting to support lithium batteries. Ideally, you would not need to disconnect the controller from the battery when it is fully charged.
-Renogy Team