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Hey guys, in April 2022 I purchased 3 of the following LifePo4 batteries: Cerrnss 48V 100AH SMART TYPE Nominal Capacity:5Kwh (32 Parallel),Nominal Voltage:48V (Built-in 16S Smart BMS). They were purchased from Shenzhen Hyuan International Trade Co., Ltd on Alibaba. I currently have a 9kwh solar...

Update at end of Feb 2023. Batteries still going strong and no-issue to speak of. I received a number of message on how to get in contact with the company. If you want to get in contact with the staff I dealt with (Ara) see below the message I received today from her: "My team is responsible...

Hey guys, I just posted a full review of my 15Kwh Cerrnss battery modules from Alibaba here if you are interested https://diysolarforum.com/threads/review-of-cerrnss-lifepo4-48v100ah-battery-modules.44668/

Makes perfect sense to me. Would you want to spend thousands on an order from China with no check or quality reassurance whatsoever? SGS does all sorts of audits. This is just an additional type they do on behalf of Alibaba customers. I think it's a great service.

No, your link refers to a wind turbine company which has nothing to do with this thread. Blackie was referring to the Solis inverter.

Ask them for the manual and or set them up in the same way I have set them up in the video. If you have only one then that is the master battery. My master is the first battery ( the one further away from the wall).

Hi. Yes there were a few pics of the internal construction of the battery, with the top and side panel off showing BMS and the side. See below: And a few other pics from the direct messaging with them at time of inspection:

As mentioned in the review what I know based on my communications with them is that they buy the cells from CATL and then put the battery modules together, and sell them. The fact that cells and PCBs are not manufactured by the company was also confirmed in the inspections report too. Keep in...

Any advice on potentially using gauge 4 cables for the 3 batteries?

Ask the seller, they'll send it to you

Solis (Ginlong). The manual says they work with several other brands also.

Hey guys, I just posted a full review of my 15Kwh Cerrnss battery modules from Alibaba here if you are interested https://diysolarforum.com/threads/review-of-cerrnss-lifepo4-48v100ah-battery-modules.44668/

Cool, thanks for the advice. You mean something as simple as this one unit? Positive wire from the battery connected on one end and negative one on other end?

I don't know about that. As I mentioned in the review and based on what I have seen since April they assemble the battery systems themselves. They are not traders in the sense of just buying a product and re-selling it, plenty of evidence for that in the Alibaba profile page. Also, their battery...

The long wires connecting inverter to battery 1 and 3 are gauge 3, so plenty thick. The smaller cables connecting each battery to the next one are gauge 6 rated at 200C (these came with the batteries and, upon asking, the seller said they could easily handle 100ah discharge currents). I was...

Yes, it would be nice if someone could decipher the barcode on the pouch cell and attest they are CATL cells. There also seems to be a QR code at the bottom of the first (cell) picture I posted.

Not sure. That's the only purchase I ever made on Alibaba. It may be that above a certain cost the option becomes available.

Haven't you bought the batteries through Alibaba? If so contact them though that platform. Staff is super helpful. They will help you set it up. I speak with them through Alibaba.

Whatever works for you go for it. Note all these modules arrived with just shy of 110 ah each indicating a higher likelihood of being from new cells than used ones. Also, today the engineer updated my batteries's software and I saw the temp protections parameters in the DR software used...

The audit option it's at the end of the purchase process on Alibaba. Once paid for it they will email you and you can arrange specific questions for the audit etc.

Oh I see, so I'll need one unit to connect/bridge the positive circuit between the battery and inverter! Great stuff. I'll do as you explained. Thanks again for the help.

Sorry for late reply, just saw this. Yes, the Solis inverter has different operating modes you can select. The hierarchy of priority for Self Mode Use (the one I have) is to supply energy the house load first (I think this is what you mean by expensive times??), then comes charging the battery...