Hi

I would like to introduce myself with this my first post. I'm busy doing the research and planning to install a solar system for me, my father and brother at each of our houses. I think I've got the design and parts all sorted out, but I'm in two-minds about the batteries. I was hoping maybe somebody here could help a bit?

Note: I will be using the Goodwe ES 5048 inverter and JA Solar panels.

I can get the following two setups at the same price and I need to choose which is best...

** PylonTech 7.0kWh (5.6kWh usable at 80% DOD)
2 x US3000B 3.5kWh Li-Ion Battery
Battery Cabinet 12U

** BYD 5.12kWh (4.86kWh usable at 95% DOD)
2 x BYD B-Plus 2.56kWh LV Battery 100% DOD
BYD B-Box Cabinet incl. BMU

Below is what I seem to find as the latest warranty info on both, but with both there are mixed specs which makes it hard to be confident in the information.

Depending on source I've found these warranty claims:
BYD 6000 cycles at 100% DOD --> 80% or 60% Capacity left after 10 years
PylonTech 6000 cycles at 80% or 90% DOD --> 70% or 60% Capacity left after 10 years

I head that the BYD has a higher continues discharge but on the spec sheet it seems like the BYD and Pylon are the same and if both are going to be 60% usable energy left at 10 years then they are basically the same. The big thing about the Pylons is they are smaller and will make the install in limited space a bit easier.

But I'm stuck, I need somebody with some good practical hands-on advice if possible...? I want to buy the battery that's gonna last the longest, but it seems like the Pylon and BYD both have the same life expectency...

21 hours ago, AbrieViljoen said:

it seems like the Pylon and BYD both have the same life expectency...

according to the Australian battery test center the BYD will probably last longer than the Pylontech.

http://batterytestcentre.com.au/wp-content/uploads/2017/07/Battery-Testing-Report-September-2018.pdf

2 hours ago, Fuenkli said:

according to the Australian battery test center the BYD will probably last longer than the Pylontech.

http://batterytestcentre.com.au/wp-content/uploads/2017/07/Battery-Testing-Report-September-2018.pdf

I've read that report, but it's on the US2000 version and an older revision of it. It seems like the US3000 has better specs with the 3.5kWh bigger capacity. And on the US3000 it seems like there are also more than one revision of this model.

I'm going to a local solar shop Tuesday to hopefully get some solid info. I've also emailed PylonTech sales team for the most current info, but still waiting on them.

I got a reply from PylonTech in China with the following documents for the US3000. From what I see the US3000 will give you the following -

6000 cycles at 90% DOD,  and a guarantee of 60% nominal energy left at 10 years. With max continuous discharge of 1C and recommended continuous discharge of 0.5C

So according to the specs it seems the BYD and the latest version of the US3000 are much closer than some people think. And with the higher capacity of the PylonTech it might be the wiser battery choice for now...

I'll take this info to a few local solar people this week and see what they think.

Find attached the documents I received from PylonTech in China.

Low voltage ESS-2019-4-10.pdf Pylontech_product_warranty_US serie-ZA SB19WP7034.pdf

On 2019/04/21 at 11:06 AM, Fuenkli said:

according to the Australian battery test center the BYD will probably last longer than the Pylontech.

http://batterytestcentre.com.au/wp-content/uploads/2017/07/Battery-Testing-Report-September-2018.pdf

The lastest report shows the Pylontech much superior. http://batterytestcentre.com.au/wp-content/uploads/2017/07/Battery-Testing-Report-7-September-2019.pdf?fbclid=IwAR2ezXo6Ade9gJi9iaTIzuMWZPSwmO8zrgbHWiXp42399CRMN1BGe88rkmk

Wow!

 I remember reading up on this report and was shocked with the results of the Pylontech batteries

Happy I went this route

The GNB Li-Ion battery is the one made by BMZ . Very surprised by its poor performance.