Trev

@system32 thanks for this post it is very useful for where I am now heading after installing my SunSynk 8kW with 2x Hubble AM2s back in April 2021 I’m now looking to finally include my solar array. Where I stay we’ve been immune to load shedding but reliability of the local network is now a big issue and so it’s time for the upgrade and to also save a buck or two! With the bought of prolonged power failures that we experienced in Ballito during Dec24 - Feb25 I established that my 11kWh battery bank was only delivering 50% of its capacity. I engaged Hubble support who dialed in via Anydesk and confirmed that a cell per battery needed to be addressed. I took them in and they honored their warrantee with great service! They obviously upgraded firmware at the same time. Upon reinstallation this afternoon I noted that although I have setup the SunSynk to reflect a Battery capacity of 210Ah, the capacity reflected via SOLARMAN Smart only shows 100Ah??? If I’m not mistaken you also had this issue if I read correctly in your post on 10 Jan 2022? How do I know if my CAN BUS connection to my master battery is reading correctly? More importantly, how do I know if my link from my master to my slave battery is also correct? Reading Hubbles website, I note they have some detail about the RJ45 cables potentially cause a short circuit to ground if you use a full straight CAT5 cable and they you should only use one with the necessary pins. Could this be my issue? It’s a tad ambiguous when you need only use the needed pins as it’s under the Cloudlink section? See here for detail: https://www.hubbleenergy.com/_files/ugd/ece034_a86bd55c3a7a457d94bfe5f221d46397.pdf Confirmation of my batteries communication with my SunSynk would be useful if you can advise? Thank you, Trev

If you are installing the Cloudlink RIOT you will be able to tell via that. While I don’t have one, I recall reading up on it a few years ago and that’s like dialing straight into your battery BMS. So it will tell you! I last used WatchTower a few years ago when I had an Axpert. I connected it to my WIFI via the RS232 port with what they called a ‘WiFi box’. Have a look at the PowerForum post here for more detail: Look online for them, here is one but can’t vouch for the legitimacy of the website: https://oricolimports.co.za/products/inverter-wifi-box-compatible-with-msk-ii-axpert-king-5kva?srsltid=AfmBOopC3OihfoFScBAlC9gGpfB7nZMK8yMZCVfZB8QgoAVs1LJlYpkJ

Thanks @Kill_switch this is useful confirmation. Your insight is much appreciated! It would also be great to hear from @HubbleLithium if this constant small current is acceptable for the battery? Is this how Lithium Ion batteries remain on standby and keep their charge compared to Lead acid where the charge is OFF until it reaches the Float voltage?

Hi @Kill_switch - I am running via the CANBUS but there is still the ability to input the three parameters above so I'm not sure if it even looks at this when CANBUS is selected? Does your SoC ever get to 100%? Or should I ask, do you ever have the situation where your BMS no longer charges your batteries after reaching 100% and then back on when you hit float voltage? @Brani mentions above that the three parameters are for lead acid batteries which I'm familiar with having had that before upgrading to Lithium. Perhaps maintaining state of charge is different for Lithium compared to Lead Acid... At the end of the day, my main concern is 'overcharging' by way of not giving the batteries any 'rest' as opposed to overvoltage. Is this a valid concern? Thanks, Trevor

Hi there @Achmat, I have been wondering the same... Just wish we received a notification via the SolarMan App to advise when we are on Grid versus Battery. I clicked on your link to the SunSynk website and noticed that your post has been taken down... Has this been resolved?

Hi All, I have 2x 5.5kWh Hubble AM2's connected to a 8kW SunSynk inverter. Upon installation and after referring to the with @HubbleLithium quick reference manual, the recommended settings are as follows: Float Voltage: 52.0v Absorption Voltage: not specified? Equalization Voltage: 54.0v I have set my batteries via the SunSynk menu as follows: Float Voltage: 52.0v Absorption Voltage: 53.6v (after emailing HubbleLithium support and being advised that "ideally charge voltage is 53.6v where 54.0v is high enough") Equalization Voltage: 54.0v I have noticed that my battery SoC is always at 99% at a voltage of 53.49v (or less) and therefore there is a small yet constant current continually flowing into the batteries that maintains the 99% SoC... Should my bank not be reaching SoC = 100% and then cutting off all charge current until reaching the float voltage when it should recharge again? I am concerned about constantly sending current to the batteries no matter how small the current. Thank you Trev

Hi Leshen, as a matter of interest, please could you clarify this? Are you saying that you basically connected your batteries in series and then to your inverter? Surely not as this would give you 153v where the inverter input voltage from the batteries is rated at 48v. So I am sure I have misunderstood you...! I assume you connected the three batteries in parallel to maintain 48v then connected the +ve and -ve terminals to the inverter...? Could you please provide a brief sketch to clarify? Apologies if this sounds trivial. Thanks!

Thank you @TonyH, there is no mixing of AC & DC cables in the trunking. The battery cables run upwards and jump over in flex conduit. The AC cables run alone in the horizontal trunking. When I install my solar strings they will run in their own trunking.

Thanks @ianm I tried finding some reference from Keith but clearly missed it. This would have helped. @Brani yes confirmed, CT connections to be in installed on 5-6. I hear you kn the level of nervousness 😆 Last night after a final check and ensuring that my earth-bond relay was engaging I switched ON. All good and running nicely as an expensive UPS for now. Looking forward to the solar installation next... Thanks to everyone for your assistance!

Meant to say that 'N underneath the terminal block lines up with L2 on the PCB...' Note: I now know that the markings on the PCB's are supposed to be blocked out, but this is exactly the point of my comment that has not been done sufficiently. Looking at my photo one can see that they have tried to blank it out, but its not so evident when you are actually looking at it...

Hi @Speedster I have the 18A...

SunSynk 8kW AC Wiring Morning all, This morning I was going to post a question pertaining to the AC wiring of the 8kW Sunsynk but decided to rather contact one of the Master Installers listed on the SunSynk website to clear up my concern. It does not sound serious, but after having chatted to Shane (Solar Electric Wise), he confirmed the confusion is real... Attached is a photo of my AC wiring for GRID & LOAD on the terminal blocks. Take note of the markings on the PCB as N, L1 , L2 (suggesting two phases?) whereas underneath the terminal block it is marked as N, L. Now this would not have been an issue if the Neutral markings corresponded, but they don't... The N underneath the terminal block lines up with the L1 on the PCB??? While this may sound trivial, for me I was not comfortable to power on until I had clarity. Shane (who i don't know i just found his contact details on SunSynk's website) confirmed that you need to wire according to the N & L markings beneath the terminal blocks. Shane thinks that the inverter is also intended for other countries where there are two phases supplying a house which doesn't happen in South Africa as we have single- or three- phase only... SunSynk have not done a great job in masking the labels on the PCB which should really be addressed! Has anyone else also been in this uncertain situation? Thanks Trevor

🙈 of course... Thanks!

@Vassen how would you know if you’ve bought the newer model? Where can I check? Week before last I bought an 8kW SunSynk at a great price and it came with the WIFI dongle.

Managed to get one from ACDC Dynamics in Pinetown. Good price too!