I have 3 SOK batteries, when I click on ( search ) in the app all 3 of my batteries show up and then I have to click on which one I want to monitor. I seen a guy with a different brand battery sun fun products be able to view all 3 of his batteries at the same time. Doesn't look like SOK allows to do that
I have this battery paired with Renogy 20A MPPT. I'm very confused about whether it is even charging. Arrived today. Measured in isoltation, the battery shows 0.4V. But shows 14.4V when being charged. I'm not really sure how to test. I read somewhere that it arrives at 30% SOC. The app also can't find the bluetooth module, so far not going well!
So how do you monitor the batteries using the Bluetooth (SOK-BMS app ) when you have 2 batteries wired in parallel? Does the app show both batteries info at the same time or does it show it like it's one big 400ah battery? Or does it only let you look at one batteries info and then you have to click on the 2nd batteries info to see it ?
I've not had a look the Renogy, I won't lie. But do know it's a sealed unit. SOK you can buy replacement BMS's from their website and do maintenance to the battery in year's to come. I've had SOK batteries for a while, I like them. 😁.. I like renogy products too, just cannot comment this time as a vs. Maybe there is a video in that! Where are you in the world? I always leave links to sellers to the country if I can in the video description. Thanks.
I think it's worth stating that the slower you drain the battery, the more capacity you'll get out of it. It looked like you were drawing roughly 10A continuous from a 200Ah battery, so this works out as roughly 0.05C. It would be interesting if you could double or triple the draw and see how much the capacity changes.
Yes that's right. A lot of battery manufactures show the capacity under certain C rating discharge. Normally on a graph, different C ratings will have a different colour.
Hello, no it doesn't. I had the non bluetooth running with the bluetooth in my Renogy inverter review. SOK I believe sell their BMS separately, you could buy one to put into your non blue tooth. I would check with them first though.
Thank you for the reply. Wish I had seen this video before ordering my battery. I just received it today. It measured 13.13 volts. Hope I didn't get someones return. This is my first project and I have a lot to learn. On your advice I have ordered a battery capacitance tester. My plan is to make sure the battery is fully charged then test it. After its drained maybe I will open up the battery and get the individual cell voltages. Good job with the videos and thanks for the information.
@@iambane661 I am sure it will be fine, SOK make nice batteries. When I started faffing about with lithium batteries I used to over think everything. Now its just a battery. You have made a good investment. Look after it and it will last for a very long time. Don't discharge it too fast or keep it charged at 100% for too long. Store at about 60% and occasionally cycle it. Use at a comfortable temperature. What is the battery for may I ask? Again lithium is the way forward, I know there expensive, but in the long run. Its a far better chemistry compared to lead.
@@SolarPowerChannelwithChris It will be multipurpose but primarily a ups. My power fails 3 to 4 times a year for several hours at a time so it will be nice to have for the home entertainment center and a few low wattage lights. I priced some ups with pure sine wave and lithium batteries and I feel I can do much better building one myself. Cost and run time. In your renogy video you said it needs 2 batteries but I am curious about something. My refrigerator is 7.5 amps so how long do you think it would run on a single battery. I plan to experiment by connecting it to my ups and see how long it will go on a fully charged battery down to 20%.(btw this is a great video idea...lol) I know I can do the math on it but real life is rarely by the numbers.
@@iambane661 nice! To keep it sweet, sounds like it will be sitting. Don't keep it fully charged. It stresses the lithium, bit like a party balloon been blow up to the max. Same goes for phone batteries and the like.
197 millivolts (seen on the Bluetooth app) is a rather large cell imbalance! Anything more than 50 millivolts is unacceptable. Do the cells balance after several cycles?
@@SolarPowerChannelwithChris If you'd be so kind, please report back on the cell imbalance after cycling the battery. Some BMS systems with passive balancing will take very many cycles to correct a 197 millivolt imbalance to an acceptable 50 millivolts. Some will never correct an imbalance that large.
