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adamis's avatar
adamis
Nomad II
Jul 04, 2017

Possible Affordable Lithium Ion Battery Option

I've posted before about lithium ion battery options and had some good discussion. I've once again done some research and it appears that more and more companies are getting into the large Lithium Ion battery business. A quick search and I found the following on Amazon:

Suaoki Power Source

Anker Power House 120AH

Jackery Power Pro

The first two units are 120 amp hours while the third is 140 amp hours. Though not as generous as my 300 amp hour Lifeline batteries I currently have, should be enough to get the job done. They are also solar panel ready, come with all of the battery monitoring one might want, have power inverter for low draw devices and the dimensions are very compact (Suaoki is 9x5.5x9 and the Anker is 6x8x7 inches). Both units weight less than 13lbs. Considering that my Lifelines weigh 90lbs each, that is not an insignificant weight reduction to be had.

I'm not ready to pounce just yet but if these companies get in an arms race to one up each other in the capacity area then I could see in six months time strongly considering this option instead of going with more traditional batteries.

Two issues I see...

1: May not provide enough DC power to start the generator.

2: Wiring into camper might take some creativity depending since they aren't designed to be hardwired (just plug sockets I believe).

What other issues do you guys see? Anyone else tempted by this route?
  • Ah are ah but apples are not oranges. A 100 ah lithium is equivalent to a 200 ah lead battery. Why? Because the power band of the lithium is much wider. You can extract 80-99% of the power from a lithium versus 50% roughly from a lead.

    A cheap lead will last 3-5 pricier 5-7 yrs. A lithium will last 10+

    Lithium has benefits in banks. Is it worth it to replace 1 or 2 lead? No. Is it worth it to replace 6 or 8 lead? Absolutely.

    Don't skimp on chemistry or a BMS. Managing a lithium pack doesn't need to be scary, IT IS rocket science but luckily there are computerized modules that are already programmed to care for your packs.
  • 2oldman wrote:
    adamis wrote:
    The first two units are 120 amp hours while the third is 140 amp hours.
    I don't think so.

    I don't understand how 400wh is equivalent to 120,000mAh (120ah). Something isn't right there.

    This post should be in Tech issues.
    I assume the 120,000 mAh is through the 5v USB connector to compare with external phone batteries.
  • While lithium ion batteries can produce an amazing amount of current from a small package, for house use amp-hours are still amp-hours. Don't be fooled by "equivalent amp-hours" or other marketing BS. That is meaningless when used as house batteries.

    In addition, the cheap stuff being sold as "drop in replacement" for lead acid isn't really. In many lithium chemistries mistreatment can be quite hazardous. The LiFePo4 chemistry most commonly used for house batteries in RV/Marine, there is less fire danger but you can still damage them easily, an expensive mistake.

    For someone living full time in their RV/Boat without access to shore power, you can justify the very high cost of a properly installed system because over their life they will be cheaper per amp-hour delivered than flooded lead acid. But for weekenders and holiday trips it's pretty hard to reach the payoff until the cost comes down substantially.
  • time2roll wrote:

    100 Ah Relion $1,300


    Ouch
    In the mean time I did test with my equipement.
    My cigarette pack DID start Honda 3000 even it was showing only 75% of charge and after 2 years of sitting Honda did not start on the first turn.
    Amazing, simply amazing.


    Click For Full-Size Image.
  • adamis wrote:
    The first two units are 120 amp hours while the third is 140 amp hours.
    I don't think so.

    I don't understand how 400wh is equivalent to 120,000mAh (120ah). Something isn't right there.

    This post should be in Tech issues.
  • By saying "solar ready" do you still need a controller?
  • With $100 discount it is only $400
    I happen to have (gift) one of those cigarette pack-sized battery, who suppose to give 400 amp boost.
    It did not help on my Powerstroke, but today or tomorrow I will try to see if the small gizmo will crank my Honda 3000.
    Amazing technology, but with hefty price tag.