Dentarg

I got some batteries from a guy called Neil in Thornton.  PM me for his number.
I ended up replacing 4 cells out of the 16.  I did a capacity test on each of them and they were defintely way below what they should have been.

With one of these:  https://www.amazon.com/dp/B07F3NHHST?psc=1&ref=ppx_yo2ov_dt_b_product_details

I will not be doing business with them ever again.

I will not be doing business with them ever again.

Hi,
Thanks, I already found some.

I have a Epever Mppt. They also make PWM controllers. They have a good range of PWM controllers with different battery charging settings. Some controllers can be program to charge lithium batteries. Inverter Warehouse and Sun pays stock them. 

At R1300 you can get a good Epever 20A MPPT that can accept panels with higher voltage that will convert the extra voltage to current for charging 12V batteries. Chris and myself are quite happy with our Epever MPPTs.
Example of the PV current vs battery current if panel voltage is higher than battery voltage.

Yes, JP's posts are great!

There is a training manual that could maybe shed some further light. Not sure what you are struggling with specifically
 
 
 

Here is a link to the sunsynk  technical support where a suggestion is made on how to prolong your lithium batteries.  I am also new to the Lithium batteries and Sunsynk5.5  and have started with their suggestion (Just adjusted for my 7.4kw SolarMd battery capacity - in my case the half point is 3700 and not the 4800 as on screen belof for their 9.5kw batteries ).
https://www.sunsynk.org/forum/techical-support/how-to-prolong-lithium-battery-life-overspec-a-bit-the-rest-of-the-tweaking-is-maybe-not-worth-the-complexity
 

I just upgraded to 72.70 in the hope that I could get my cheap Builders Warehouse generator to work but it still doesn't.  Has anyone tested a generator on this version?