Anish

Anyone know the difference between the Shoto M14 and the L5?

The battery status indicated on your battery is correct. The inverter is reading SOC based in voltage and is a ‘guess-timate’ according to voltage dissociation curve and is influenced by rate of discharge . I wouldn’t believe the SOC on the inverter Shoto still haven’t created a reliable communication interface for axpert/Growatt type inverters it’s a pity because they are quite solid batteries and right now we are purely using them as ‘lead acid battery replacements’ in USE mode

It changes everyday. storage + date in yyyymmdd format. - so today will be storage20201011

Is the shoto Sda48100 not a 16s?

I’ve have a similar setup. 2x Shotos sda100 m14’s in parallel with 2 parallel Growatt 5kvas in the setup. No comms cable available /designed anywhere from what I gather. I have float set at 54.3 and bulk at 54.0v(even though they are lifepo4) . Back to grid at 48.0v and back to battery at 52.0v. Cut off voltage is 46v. I get about 6kw out of the stack. Dropping the ‘back to grid’ to 47v or below has resulted in a few bms alarms previously. pity there’s no comms cable for these as they are pretty decent batteries used widely in the communication industry

These seem to be reportedly good quality and solid BMS but I can’t seem to find any communication interface for Growatt/Axpert (or any other inverter). It’s has an RS485 and RS232 interface. Using voltage criteria to manage these is certainly a travesty. Has anyone been able to get their inverters to properly manage SOC on these? The local distributor seems uninterested

So it seems that a cycle is 100 percent of the battery capacity

On that topic , Is a cycle considered from 100 percent down to 10 percent? Is that the same as 2 cycles of 100 to 60 percent or are those considered 2 cycles ?

Does anyone have any experience with the Growatt settings on Shoto 48v m14’s. I have 2x 4.8kw batteries in USE setting on my Growatt inverter.I assume they are 16s batteries. I’ve set bulk to 54.8v and float to 54.2v. Back to grid at 48 and back to battery at 52v. This gives me about 6kw from the 9.6kw bank. If I set back to grid at 47.5, I get a low voltage alarm on the batteries Has anyone had better success with user setting on these. I’m told a comm cable is in the pipeline but I’m not holding my breath

Mine drops to about 50v too. I’m not an engineer but I suspect that it has to do with the non linear (flat portion) of the battery discharge curve of a lifepo4 battery. I’m getting the batteries to ‘near full’ on the Shotos led SOC indicator. The inverter reads them completely differently. There’s often a disparity between what the inverter sees and the actual SOC on the battery. Notwithstanding , I’m getting about 60 odd percent out of them using voltage parameters only.

I have a Growatt inverter and my settings are on SBU I set my bulk and float to around 55v. Back to battery at 52v and back to Grid at 48v. This leaves about 25 percent left in the batteries (there’s 1 led solid). I get close to 6kw from my 2x 4.8 kw m14’s. If I set the back to grid to 47.5, I get a low voltage alarm. At least I’m getting about 65 percent of the intended capacity with this. The BMS Cable and protocol is imminent but long overdue from shoto

Apparently Growatt have now completed the communcation protocol for Shoto batteries. Anyone else aware of this ?

I have a Growatt 2x5kva inverter with 2x4.8kwh Shoto batteries and 12x330w panels . I get about 5kw out of the 2 batteries using voltage as a parameter from the inverters. Please update us once you get the cables to correctly read the SOC on the Shotos. I’ve had no help from Growatt and poor service from Shoto(my installer had no joy from the South African supplier). Why do they even sell these battery-inverter combinations if there’s no proper way to manage them?