Hi, so I am on the research path to find the right batteries to go with a sunsynk 8kw inverter. My supplier has sunsynk sslb1 5.12kw batteries in stock for the same price that I can get a pylon 4.8kw battery for. 
 

now for easy of use a lot of people have suggested the pylontech and Hubble but no one actually uses the sunsynk batteries. I’ve been reading up about the testing being done in Australia regarding the pylon batteries and to me with my limited knowledge looks pretty good. Only issue I have with pylon is that I don’t see the 4.8kw battery on there products list on their web page which leads me to believe that the 4.8kw that I can buy here in SA are discontinued and replaced with another model. Is this at all correct??

now I have noticed that sunsynk has two models of batteries, the 5.12kw sslb1 and the sunsynk 5.12kw pro max. The pro
max seems to be a lithium ferro phosphate and the sslb1 is a lithium-ion phosphate. What are the differences between the two. I have uploaded the specs sheets and the pro max seems to be better although it is quite a bit more expensive. Is it worth it? 
 

the pro max picture has the lithium ferro written on the top of the picture

1 hour ago, Derek Ramos said:

now I have noticed that sunsynk has two models of batteries, the 5.12kw sslb1 and the sunsynk 5.12kw pro max. The pro
max seems to be a lithium ferro phosphate and the sslb1 is a lithium-ion phosphate. What are the differences between the two. I have uploaded the specs sheets and the pro max seems to be better although it is quite a bit more expensive. Is it worth it? 

They are both LiFePO4(LFP) (lithium iron phosphate). The Pro max has a higher continuous discharge rate than the sslb1. The sslb1 and the Pylontech UP5000 has almost the same specs,you would need 3-4 of them to supply your 8kw inverter with 150-200 amps respectively. With the pro max you need 2 of them to be able to supply the inverter with 200A . So you have to look at your personal needs and requirements . Will you be running more than 5kw of loads during grid outages ?and for how long? Do you need 10kwh capacity or 15-20kwh? If you are planning to run large loads for long it maybe better to go for 4 of the sslb1 or UP5000 vs if you dont need more than 10kwh and your large loads of 5kw or more are not for extended periods the 2x pro max might be a better choice.

Edit * Regarding different lithium chemistry ,the 2 main types are LiFePO4 and NMC (nickel manganese cobalt oxide) In the Australian testing report take note of the differences between the two in terms of cycles and capacity lost. Most of the market is moving away from nickel based batteries due to numerous reasons. So make sure you read up on the differences and make sure that you know what chemistry the battery is using that you plan to buy.

Edited May 30, 20224 yr by Nexuss

@Nexussthank you for the information, look my end goal is to get off the grid completely, but to get the ball rolling I have decided to get the sunsynk 8kw and two 5.12kw 100ah batteries, (still figuring out which ones) I don’t just want to go buy a battery because so and so said it’s good, I’m trying to get the battery that is best for my application and because this is my first rodeo I’m very overwhelmed. At this point I will not be running more that 5kw at outages, i will however be purchasing panels in the near future to supply my geyser and charge my battery pack during the day, ( geyser is 15.3amps or 3700watts)
 

regarding your above post I have attached another picture with specs on the sslb1, can this be correct because it says that it has a 1c rating on maximum discharge and the only difference with the pro max battery is its DOD of 100%, but then again I don’t see the sslb1 on sunsynk website, I only see the pro max battery. So I don’t know what to think. 

17 minutes ago, Derek Ramos said:

regarding your above post I have attached another picture with specs on the sslb1, can this be correct because it says that it has a 1c rating on maximum discharge and the only difference with the pro max battery is its DOD of 100%, but then again I don’t see the sslb1 on sunsynk website, I only see the pro max battery. So I don’t know what to think. 

Yes you are seeing it correctly , thats 1C discharge  and 0,5C charge rates. 

This is what my whole house draws in amps and watts.. some people might find it interesting