Simpliphi has been around since 2002, so they actually are older than their 10 year old warranty.  Most other companies can't make that claim.  As far as reliability, each 3.8 kWh is independent, so you can just shut down a bad unit and send it in for repair. I'm building systems with 4 to 6 units usually.
  I too have long term questions, especially about corrosion in marine 
environments, and long term issues with electronics such as capacitors 
drying out. I think the BMS may go out befor the projected 8000 cycles 
to 100% DOD.
I've been a part of the solar experiment since the 80s, and we've come a 
very long ways, which is amazing.  For all the questions we have, lead 
acid is definitely going to be come obsolete in our life times, so the 
sooner we all get savvy with newer technologies the better.
Ray Walters
Remote Solar
303 505-8760

On 3/23/20 7:36 PM, Bradley Bassett wrote:
Discover Battery has been around since just after WWII. I think that since each Li battery is native to the system voltage, the way to get some redundancy is to simply have more than one battery, most systems will anyway. Then if one fails you can use the other ones until the failed one is replaced or fixed. A lead battery would be less prone to catastrophic failure, alkaline batteries even more so if you can handle the cost and other issues, so there is something to be said for that. I have multiple inverters and battery banks and it has come in handy when there are failures (inverters).
Brad

On Mon, Mar 23, 2020 at 3:53 PM Jerry Shafer <jerrysgarag...@gmail.com <mailto:jerrysgarag...@gmail.com>> wrote:
    Blue planet has money behind them and already years of
    manufacturing, many more years then some of the other
    manufacturers out there
    Jerry

    On Mon, Mar 23, 2020, 2:06 PM frenergy <frene...@psln.com
    <mailto:frene...@psln.com>> wrote:

        Wrenchers,

                     I seem to continue to have my foot stuck in the past
        regarding off-grid.  Off -grid seems to have more of an
        element of a
        need for reliability, redundancy, klugability.  Believe me L-ion
        batteries and especially the "total units" like the:

        https://simpliphipower.com/product/access-sol-ark/

        are beautiful answers to "buy it connect up the cables and
        forget it",
        no maintenance to boot.  I want one. But Yikes, many of these
        companies
        are new, which will survive well into their warranty period? 
        Its a
        double-edge sword....if we don't transition into the L-ion
        world, how
        will they survive?

                     Also, if the charge controller, battery cell (in
        2 volt
        cell battery pack), fan or inverter fails in a more
        conventional system,
        there's probably a go-around spare whatever in stock (or the
        failed 2
        volt cell can be cabled around waiting for a new cell). Maybe
        all I'm
        asking is how field serviceable is a failed L-ion battery or
        its BMS? or
        the total units like above? Are there failures? maybe too soon
        to know.

                     Go ahead, beat me with a stick, maybe I'll learn
        something.

        Bill

        Feather River Solar Electric
        Bill Battagin, Owner
        4291 Nelson St.
        Taylorsville, CA 95983
        530.284.7849
        CA Lic 874049
        www.frenergy.net <http://www.frenergy.net>


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