Justice MM

That's great news indeed. I hope they can parallel more than two units or make larger units in future. I installed the unit in May this year, and I found it quite a great product. There are few improvement issues to address such as that meter installation manual, which is quite useless, also that the inverter won't work without the meter. They are also not good in explaining the inverter settings. In overall it's a great device quick and easy to install. 

Thanks a lot. Just happened to be in Pmb. I am trying very hard to get the batteries delivered tmr. If that fails I will definitely contact you.

Firstly, there isn't a lot of peer reviewed research for LiFePO₄, but the amount there is clearly shows that you will not get 16 years.  Age is significant factor in LiFePO₄ batteries (as with all battery chemistries but more so than it is for Lead Acid, in other words, Lead Acid can outlast, in terms of age, if you assume no cycles).
People like pointing out how things work on Solar Panels or Lead Acid.  However each battery chemistry is exactly that, an ongoing chemical reaction.  Solar Panels aren't chemical reactions (photons hitting a solid substrate to release electrons is nothing like a battery which is on-going reaction and has bazillions of electrons constantly migrating regardless of use).  Nor are two chemical reactions comparable just because from the outside it looks like a battery.  I think you may need a healthy dose of realism in that respect.
Secondly, for a LOT of battery manufacturers their warranty isn't worth the paper it is written on.  The company closes down or they simply claim abuse and you have no recourse.  So I wouldn't put much stock in the warranty either.  Google is your friend, the evidence is there.  Battery manufacturing is cut throat low margins and the people running these companies see their customers as their enemy (once the product is out the door).
In a LiFePO₄ chemistry, the electrolyte is a mixture that should "block" electrons from moving from the anode to the cathode.  There is undesirable electron migration from the anode to cathode which damages the cells by making it harder for lithium ions to migrate through the electrolyte over time.  Three factors determine the speed of this degradation
Battery temperature.  The higher your temperature, the faster your batteries will age.  This makes perfect sense as chemical reactions get more vigorous at higher temperatures.  But LiFePO₄ also shouldn't be charged below 0℃ so there is a balance, 25℃ is generally accepted balance. State of Charge/or cell voltage.  The higher this is the higher the electron migration probability is (Which is why Li-ion batteries last longer at lower states of charge).  Again this makes perfect sense because you have significant number of electrons at a very high energy state that want to move to a lower energy state.  And because of uncertainty principle, you will ALWAYS have electrons somehow making their way between the anode and cathode.  More charge, more probability.  We are talking on the scale of trillions of trillions of trillions btw. Discharging, each discharge does actually cause degradation also.  This is because a barrier forms between the anode and cathode that blocks lithium ion migration.  The more you discharge (not per cycle, just discharge in general), the more that barrier forms. Depth of drain is not such an important factor for LiFePO₄, in simple terms, the amount of Wh the battery can charge and discharge is finite (in total).  Wether you reach that amount by a large or small number of cycles you'll get similar results.  But because of aging it makes more sense to deeply discharge your LiFePO₄ battery to get the most out of it.  Obviously I'm not talking about beyond 90% DoD, then other factors come into play that will significantly reduce age.
Lastly because age is a significant factor in battery age (due to the electron migration problem), you should go for 90% DoD to get the most of out of your battery.  You aren't going to get 16 years, I can guarantee you that.  I would also be surprised if you get 10 years.  And in 10 years battery technology will have moved on significantly.  6 years is a realistic time frame for batteries up to 8 years I would say.
Small print: I'm not a chemist.  I love physics (especially quantum physics), electronics and find chemistry fascinating (but only have enough knowledge in that area to be a danger to myself if I were let loose in a lab).  So take anything I tell you or anyone else on the internet tells you with a grain of salt.  Research papers is the way to go and above is what I've gathered so far.  There isn't a lot of long life studies out there because LiFePO₄ has only existed since around 1996.  Especially don't trust manufacturers, they are trying to sell you something and their testing is not long term.  They make predictions based on short term testing which will be fully covered by their T&Cs saying that they believe their data is accurate.  But above is based on most of my reading and I believe it to be accurate.  If it isn't call me out on it, we can all learn more

The Shoto battery is made by Shuangdeng. I contacted the supplier and they sent me the communication setup which says I must use CAN and set it on 00. I have attached the document.
Deye Inverter communication set up.pdf