Sunsynk 5.12 vs 5.32kWh (CATL vs BYD?)

[Robsheep]

We are looking at purchasing a Sunsynk battery but find very little information on comparisons between the 2 5kW offerings from Sunsynk.

Could anyone assist us and explain the difference between these 2 options and or advise if the Hubble AM 5 compares to the Sunsynk 

[Kalahari Cruiser]

Yes the SunSynk website is sorely lacking in this regard. There are at least 3 "5KWH batteries". I actually called SS support about this and they were unable to assist (albeit I was specifically enquiring about the IP67 battery - which late last year was still new). Someone at Herholdts however was able to tell me that the IP65 version battery is BYD.

My understanding is that the earlier models use CATL cells and the latest ones are using BYD cells. 

i.e. 5.12 KWH in the outdoor IP65 housing - round edges and button at bottom (I have two of these): BYD cells

10.6 KWH battery (I understand is also BYD)

5.32 KWH battery (I've been told BYD)

Non-IP65 5.12 KWH battery: (I've been told CATL). 

I believe the two types can't/shouldn't be mixed. 

Take none of the above as fact, just where my enquiries and research led me at the time. 

[Robsheep]

Thanks, that explains it a lot better than Sunsynk. In terms of performance are the BYD cells better than CATL? Or would you suggest going for the more economical option?

[Kalahari Cruiser]

I’m not sure which of CATL or BYD would be performing “better”, also not sure why the transition from one to the other supplier in some later models. I think both cell producers are big players. Have seen some reports of BYD producing cells for Tesla…

Can’t really comment on what’s potentially a more economical option - I think many of the batteries are in a similar ballpark (early thirties for 5kwh?) and I chose SunSynk batteries mainly for the extended inverter warranty they provide (limited warranty doubles to 10 years), thinking that the BMS will likely be well optimized with the inverter, 1C rating, availability a few months ago, and because I wanted outdoor-rated batteries (SunSynk IP65). And the cool form factor 
 

[Kalahari Cruiser]

On 2023/05/03 at 10:37 PM, Kalahari Cruiser said:

5.32 KWH battery (I've been told BYD)

Just a small correction, I believe the 5.32 kwh SunSynk battery contains REPT-made LiFePo4 cells, not BYD, but they use the same BMS and are compatible with other BYD SunSynks (apparently all the newer ones, incl. my IP65 rated 5.12kwh). The older ones used CATL cells and not compatible? I still don't have an authoritative 'from the horses mouth' source. 

[Gee91]

6 hours ago, Kalahari Cruiser said:

Just a small correction, I believe the 5.32 kwh SunSynk battery contains REPT-made LiFePo4 cells, not BYD, but they use the same BMS and are compatible with other BYD SunSynks (apparently all the newer ones, incl. my IP65 rated 5.12kwh). The older ones used CATL cells and not compatible? I still don't have an authoritative 'from the horses mouth' source. 

I see here you said you are using the Sunsynk batteries. Are you achieving the 1C according to your BMS?

[chukaman]

On 2023/05/15 at 3:06 PM, Gee91 said:

I see here you said you are using the Sunsynk batteries. Are you achieving the 1C according to your BMS?

Whilst we were under the impression that this battery (the CATL one) was capable of doing 1C, our installer informed us that that is a maximum that the system is capable of doing, but that they are supposed to set things up so that it only uses half of that, i.e. -50A. Why do they sell these batteries as being 1C capable if they then go on to not allow you to use 1C?