1 hour ago, LukeMeijsen said:

I have measured the battery voltage and its 46.9vdc.

I assume that's with a multimeter. Is that about the same as the voltage reported by the inverter and/or monitoring software? 

1 hour ago, LukeMeijsen said:

It seems that the inverters goes into bypass a lot without it being near 75% of load.

That will be because of the very low battery voltage. Do they charge to a higher voltage?

What will be the best way to download the BMS data?

 

Hi Guys thanx for an informative topic. Where can I find the software to read my Shoto 48v BMS?

On 2020/08/19 at 5:17 PM, Anish said:

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 

I get its 2 years later most likely too late 

Leaving it here in case someone else stumbles onto this as i did

You can actually make up the cable yourself ie cut the pc network cable and splice together the wires from each side to be on the correct pins and disconnect the unused pins or ask a somebody that has the crimping tools to make the custom cable i have made up a cable for somebody before and it works fine, he had a standard network cable that obviously did not work 

 

 

 

 

 

 

 

 

I have a Kodak King 5Kw inverter with 2 Shoto SDA10-48100 batteries. I also have 8x 315w solar panels and have just added 4x385w panels all connected in pairs and then in parallel. Theoretical output should be 4Kw, allowing an output efficiency of 80% I should at least get 3.3Kw peak power output. I can only get 2.5 Kw

Before I added the extra 4x385w panels I was getting 2.0Kw

Does anyone have any ideas why I am not getting the expected increase in PV power?

I have also noticed another problem

When the load exceeds 4kw at any time and the PV Power output is 2.5 Kw the inverter switches the PV power off and reverts to Utility or battery (is utility is down). If the load is reduced to less that 2.5Kw then after about a minute the Fan in the inverter speeds up and the PV Power output climbs to the level required to supply the load

When the PV power output is 2.5Kw the PV voltage drops to 60v ( the no load voltage at PV is 75v)

Does anyone have a similar issue or a possible solution?

Are your new panels in the same location and angle and face the same direction as the old panels? If you add different spec panels in parallel, they will all be dragged down to the lowest spec ones, so you will likely not get the max output from the array.

Can't help with your other problem as I'm off grid.

First of all, did anyone know where I can get the actual manual for this battery? 

I have 2 4.8kw shoto batteries (although 1 currently went in as it wasn't charging for some reason)

Ohm inverter

 

I have always had it set on % mode,  and I never realized it was a bit of a guessing game until recently. Although it always seemed fairly accurate.

In any case,  installer has insisted to use V mode.  But this is confusing me.

Currently have it set to shut down at 47V,  restart at 48v

But I really want to use the battery as close to full capacity as is, safe. The idea is to try to get us through the night after sun set (which should theoretically work with around 9. 6kw of available backup stored?) 80% of that is  7.6kw

Sundown between 5 and 6, and thereafter we may draw 400-600w till 9.30 and from then on 200-400w 

 

Any ideas?

 

 

44 minutes ago, Peach said:

First of all, did anyone know where I can get the actual manual for this battery? 

I have just uploaded 2 versions of the manual for the 100Ah Shoto, be sure to use the one that matches your battery. There are 15S and 16S versions with different charge settings and the older batteries use RS232 comms to the inverter whereas the newer batteries use CAN. Check the sticker on your battery to be sure you are using the right one.

 

HI

I'm trying to figure out if the Shoto 4.8kWh batteries BMS are compatible with the Sunsynk inverter. Seems most don't have any luck and are using AGM settings on the inverter.

Normal comms cables won't work as it seems the pinouts are quite different. If I had a cable made up, connected to the RS 485 ports do you think the BMS will then work? Any idea how I would connect the pins since the inverter has 2 RS 485 A/B pins and 2 GND pins? 

The battery RS485 pinout is as follows:

Pin 1 RS485 B

Pin 2 RS485A

Pin 3-7 NC

Pin 8 GND

Inverter RS485 port:

Pin 1 & 8  RS485B

Pin 2 & 7 RS 485A

Pin 3 & 6 GND

Pin 4 & 5 NC

20 hours ago, boatmaker said:

HI

I'm trying to figure out if the Shoto 4.8kWh batteries BMS are compatible with the Sunsynk inverter. Seems most don't have any luck and are using AGM settings on the inverter.

Normal comms cables won't work as it seems the pinouts are quite different. If I had a cable made up, connected to the RS 485 ports do you think the BMS will then work? Any idea how I would connect the pins since the inverter has 2 RS 485 A/B pins and 2 GND pins? 

The battery RS485 pinout is as follows:

Pin 1 RS485B

Pin 2 RS485A

Pin 3-7 NC

Pin 8 GND

Inverter RS485 port:

Pin 1 & 8  RS485B

Pin 2 & 7 RS485A

Pin 3 & 6 GND

Pin 4 & 5 NC

You should only need a cable with pins 1 & 2 connected, straight through, you don't need a ground. From the pinouts it looks like a normal cable would almost work, but pin8 (GND-RS485B) is probably causing problems.

You could get an old LAN cable and cut and insulate all the unnecessary wires on pins 3-8 and test with that.

Good day to you Boatmaker, 

I see Jumper has replied to your question. It is worth trying what he has suggested. Please post the results on this website. I have attached a Sunsink compatibility list from Sunsink, nevertheless I think it is still worth trying out jumper's suggestion.

 

Battery Compatibility .pdf

Oops sorry,  Sunsynk

I tried an old LAN cable, just cutting Pin 8 out. Leaving the rest. RS485A on master to RS485 on inverter.

RS485B on Master connected to RS485A on slave 

Battery 1 dip switch 1 on, all others off

Battery 2 dip swtich 2 on, all others off

Left all settings on Inverter, except obviously changed to Lithium, Bms error off, Protocol 1.

 

Turning on the master battery, gave an alarm on the battery. Then the inverter tripped, after a few seconds reset and coming on gave a F58 BMS comms fault, tripped again, then came back on after a few seconds, no alarms on inverter or battery - so everything seemed normal, except there was no info on the BMS screen. So that didn't work.

The inverter tripping makes me nervous - should it do that?

I can try and cut all the wires on the LAN cable, leaving only wires/pins 1 &2 connected; but i'm not sure of the dip switches on the battery, the manual doesn't give any advice, and I've also seen that the "Protocol" setting on the inverter can play a role, so not sure what that should be set to?!

 

The battery compatibility sheet I sent you suggests that the Sunsynk be set to operate on voltage only. This suggests to me that the Sunsynk and Shoto's are not comms compatible. 

Dip switch settings are I think correct for the Shoto 4.8 kWh 15S battery, but not for the 5.12 kWh Shoto battery which is a 16S unit.  My 2 Shoto 4.8 kWh 15S batteries use the dip settings 1-master, 2-slave and I have not experienced the alarm and tripping issue you mentioned, but then I do not have a Sunsynk inverter and my system is set to use voltage.  The battery audible alarm beep (momentary) is normal on boot up or reset of the Shoto. 

I suggest cut cables as suggested by Jumper, or set to voltage as suggested by Sunsink, or try dip switch settings as used by the Shoto 5.12 kWh 16S battery. Jumper provided the 16S manual with his post.

21 hours ago, boatmaker said:

The inverter tripping makes me nervous - should it do that?

This will be happening because it is set to lithium mode and can't communicate with the BMS, it is doing what it is supposed to.

22 hours ago, boatmaker said:

Left all settings on Inverter, except obviously changed to Lithium, Bms error off, Protocol 1.

It might be necessary to try different protocol settings in order to find one that will work, but it might also be necessary to change the protocol on the BMS itself for it to work. There is another user on here who has his shoto and sunsynk talking, (via CAN though), but his protocol on the BMS is set to something different from the default:

This setting is only available via the seplos BMS software connected via RS485 to USB on a PC, where it can be changed like in the image below, for CAN and RS485:

 

This is all theoretical at this point as I've not seen someone with this exact setup working, but it might be possible to find a combination that works. I know solar assistant works via RS485 with shoto and sunsynk, so it could be possible with the right combination, but be aware that it might also mean updating the BMS firmware for newer protocols, I'm not sure, these are just the places where I would look. I would try getting 1 battery communicating with the inverter first and then try connecting the slave once that is working, then you will know it is down to the dip settings on the slave and then that's the last problem to sort out.

Thank you all for such good advice. I was on the verge of changing my invertor. I have the same configuration and setting stated however my issue is that when there is during the day the solar input is insufficient for the load, my battery drains to close to empty and doesn't cut over to UTY to charge the battery. Setting is on SBU. Any advice what would force the uty to take over when the battery is been close to depleted?

13 hours ago, gavis said:

Thank you all for such good advice. I was on the verge of changing my invertor. I have the same configuration and setting stated however my issue is that when there is during the day the solar input is insufficient for the load, my battery drains to close to empty and doesn't cut over to UTY to charge the battery. Setting is on SBU. Any advice what would force the uty to take over when the battery is been close to depleted?

This should be setting 12 - Back to Utility, you need to increase the voltage set there. Setting 13 (Back to Battery) controls when it will switch back again after charging.

Yea but using the voltage is crappy with lifepo4 flat curve

ie you can't get a nice voltage to have the reserve consistent ie voltage sag may mean you have a bigger reserve on high load or low load means you have a smaller reserve

 

I could get solar assistant to talk to the shoto via rs485 but the could not get the soc to display correct

Bought a usb-rs485 

The soc was only accurate when using the connection via the rs232 port ie phone plug to the left of rs485 had a rs232-usb adapter already that i used with pc

The protocol selected as it was on solar assistant website

 

I tried solar assistant via trial

 

Have been using SMH for a while, used the emulated bms so it calculates the soc with the stats load etc as i have mixed batteries one shoto and one diy battery have not gotten around to get both set up for coms 

 

Using one of these 2 smh/solar assistant connected to your axpert via a raspberry pi,Makes managing the device something you can do remotely

 

So you can see the the soc and then change the sbu/uti if weather or shedding changes

It really is a game changer with these off grid inverters as you can't blend eskom and solar

You can use eskom to carry load and solar gets relegated to battery charging, easy enough if you arenin front of device, but if not home you essentially have to wait until it knocks on the back to grid setting

 

Setting it too high means you lose lots of solar production , too low next to no reserve for shedding

 

Thats where the remote management changes the game

Edited January 26, 20242 yr by Leondavibe

On 20.02.2021 at 21:31, Ratoka said:

Я використовував інвертор DEYE із SHOTO  SDA10-48100. Інвертор без проблем зв'язувався з BMS акумулятора за допомогою кабелю RJ45, підключеного до портів RS485.

Hello!
I have the same kit (deye sun + shoto sda). But I could not connect them in such a way that information from the battery (voltage, SOC temperature, etc.) was available in the inverter menu. What settings on the inverter did you choose? What code in the "lithium mode" line did you choose? How did you install the switches on the battery? I will be grateful for the answer!