DeonBez

SunSynk 8kWh Updated on 2022-12-12 to: M 6.0.2.2 / S 1.7.2.4 / C E.4.2.6 "M:" Master MCU software version "S:" Slave MCU software version "C:" Communication MCU software version

Price Drop R62500

I bought some EVE 280Ah (LF280K) cells in 2022 for DIY build. It took around 60 days to arrive but was very happy with the packaging and quality. I am in the process of looking at ordering some cells again. PM me if you are interested. Maybe I can piggy back some extra cells.

@djhackett, I had a similar problem. Please see my response here:

Thanks, I set it to 0W. Difficult so see the exact difference as I am using an Efergy energy meter to meausre it, might be slightly lower but still around 0.8kW drawn. As soon as I switch the grid feed to inverter off, the stray grid power usage disappears. What is interesting, is that the inverter does not show this as part of the Grid usage. Extra info and explanation: This morning I captured the prepaid meter reading and waited around 2 hours. During this time the Efergy meter showed around 0.8kW. After two hours the prepaid meter reading did not change. This means that the power seen by the Efergy is not "real" power (but rather reactive power). This hooks on to and is confirmed by discussions in the thread below:

I have a new installation with 8kW Sunsynk inverter. Like @Pramod, we also have 0.8kWh constantly drawn form the grid. Already set to Zero Export with Limit to Load Only and Grid Trickle feed set to 20W. If I switch the grid feed to inverter off, everything is working fine, but I prefer to keep the grid connected to top-up batteries before load shedding if required. Any input on what else can I set / check to remove the 0.8kWh constantly drawn?

Price Drop R65000

Price Drop R67500

Price Drop R70000

Price: R75000 (Negotiable)

Item: BN52V-310-16k NG Age: August 2018 Price: R61000 Payment Method Accepted: EFT Warranty: 7 days for testing Packaging: Yes, will be provided if shipping is requested Condition: Used daily since August 2018 (around 1500 cycles) Location: Strand, Western Cape Reason: Upgraded to higher capacity so the battery pack is not needed anymore Shipping: Yes, cost and risk on buyer Collection: Yes, preferred Link: https://www.bluenova.co.za/wp-content/uploads/2020/07/BN52V-310-16k_NG.pdf PM me for detailed discussions

It was a local supplier in Strand (Western Cape). I don't know name of the original supplier it was bought from.

After back and forth with the Growatt supplier, the brand new inverter was returned for testing and found to be faulty. It will be replaced, case closed 🤓 Thanks for all the inputs and suggestions.

The 3D design for the Seplos BMS is complete and available at https://www.thingiverse.com/thing:5604549 For more information see here

This info might be of help https://www.hubblelithium.co.za/sunsynk

I built a 10kWh DIY battery in December 2021 with locally bought 100Ah cells together with a JBD BMS (250mA balancing), compression rods and wooden box. I have SMA Sunny Island (2013 model) inverter and did not need comms between inverter and BMS as I am used to using voltage settings. Up to now the cell imbalance was never more than 40mV and usually below 15mV. I used the Bluetooth App of BMS to monitor the cells as and when required. After this positive DIY experience, I bought EVE LF280K cells via Alibaba and also some Seplos Mason 280 DIY boxes. I installed my first box a month ago and up to now found the cell balancing very good (below 10mV imbalance). Planning on building a few more. I posted some pictures and also modifications here of my first Mason 280 DIY battery build. I was so impressed with the Seplos BMS, that I upgraded the first DIY battery to use the same BMS. See attached photos. My son is busy designing enclosure to 3D print for the BMS together with the LCD.

@zsde As I am really struggling to get my setup (similar to yours but no solar panels) going, please share the Growatt settings you are using. Inverter firmware is as attached:

I tried SUB and SNU it today. No difference. SNA should have been SNU in original post (typing error)

The issue is not that the inverter does not switch back to utility, but rather that the battery is only charging at the small current of 1.5A and also only to 49.1V and not to around 54V.

System Summary: Growatt SPF 5000 ES inverter. Hubble AM-2 battery. No solar panels. Using CAN comms between Growatt and battery. I have a similar problem but a bit different. Battery stays at around 49.1V and SOC on inverter shows 52%. Inverter only charging at around 1.5A (set to charge at 30A from grid and combined solar and 60A. Setting 1 UTL Setting 14 CSO (tried SNU as well) Did complete restart of inverter after disconnecting battery as well. No change. Any insights would be appreciated?

Do you still need a BMS. I have a few JBD and Seplos BMSs that I did not use on a project. PM me to discuss.

This BMS switch on by pressing the small button next to the RS485 connections (like network ports) To switch off, press the button an keep pressed in for a few seconds

On a side note, much of the generated power may only end up at the DC side to charge the batteries for use during night time or loadshedding. This means that a bigger inverter is required for generation even though only 60A will be uitlised on the AC side...

Thank you for the clarification

Thank you. This is then different from the information shared for the Deye inverter here https://diysolarforum.com/threads/how-to-connect-generator-to-2x-deye-8k-inverters-in-parallel.43141/#post-545332