Hi all looking at getting sunsynk now seeing as theres no real other choice around here where I stay other than Hubble from installers.Id like to know ,apparently one if not all Sunsynks are 0.5c batteries and not true 1c batteries unless you run them at 100% all the time and Sunsynk themself actually advised that you run tham at 0.5c? I know its better for the batteries but is 1 gonna be enough for the 5kw inverter then or will you actually need 2 like the dynesse batteries?or is all this wrong and they run comfortable at 1c?and and which of the Sunsynk batters are the better one? Thank you
edited my post had a blonde moment
You need to check the manuals of the batteries
Often what they mean with 0.5c batteries
They can supply load at 1c ie can meet the draw on your 5kw inverter ie need one
But recommend charging at 0.5c ie 50a
so if just pulling kettle or other high powered device for a short stint not a problem
as to pull through a 4hrs shedding your avg pull would need to be 0.25c
ie if you pull 1c battery would be flat in an hour and you would need more batteries anyway
This is often bms related instead of cell related (not always but more often than not)
ie the daly bms and others like it
Allow a max charge rate that is half the discharge rate
So if you try and charge with more it disconnects the charging circuit from the cells and stops charging
some say it is better for cell longevity i suppose hence why they go this route
on the sunsynk batteries you can draw 100a constant load
so would only need one, they do add a caveat of 25c +-2c
if you deplete the battery over a shedding you would need 4hrs of 25A ie 0.25c to recharge it
so really not a problem
the only problem i can see is limiting your solar
ie the max you would be able to put into the battery would be 50a * 51.2 = 2560w
ie if your solar array is more than 2560w the excess would be lying idle if you don't have load to pull it
i would not go for an nmc cell based battery over a lfp/lifep04 battery
for safety reasons, i don't know what all the hubbles are based on just know that there are some nmc models in the mix
failures percentages are so tiny that it should not matter, but however small the statistic it matters if it happens to be yours
img attached is for the sunsynk
