Re: Solar Upgrade Reply #25 – March 05, 2025, 03:31:20 pm I had a question regarding whether the batteries I had installed by Discount Solar were heated or not. The installer invoice stated they were, but the manufacturer literature doesn't mention heaters. After talking to Craig, the owner of Discount Solar, he confirmed that they are indeed the heated variety. Then I received this message from the manufacturer, which gave me a 'warm" feeling. Thank you for purchasing our lithium 12V battery. I am sorry there was no indication of heater on your packaging or battery. We will be looking at adding this to all the labels going forward. Based on the information shared with us, your serial number contains the letters "EV" which indicates there is a heater. We stopped offering non-heated versions about a year ago but they contain "DX" in the serial number. Please let me know if you have any questions.Zack CoxU.S. Battery Mfg. Co.US 12V G24 Lithium-Ion Battery | Essential Li® | U.S. Battery Mfg.
Re: Solar Upgrade Reply #26 – March 30, 2025, 03:50:31 pm No big deal but just curious; the Blue Sky solar controller states that the battery voltage is 13.6V but both the Victron monitor and the battery BMS’s are at 13.3V. Why would it be different?
Re: Solar Upgrade Reply #27 – March 30, 2025, 05:46:06 pm Off the top of my head: unless the Blue Sky controller has a separate voltage sense wire, it's telling you the voltage at the controller's output, whereas the Victron monitor and the battery's BMS are telling you the actual voltage at the battery.Why the difference? My first guess would be voltage drop between the controller and the battery, due to undersized wiring. Measure the length of that cable run, check the wire gauge, and plug those numbers into a voltage drop calculator to see what comes up.What charging voltage does the battery want to see? If you're losing three tenths of a volt in the wiring, then the battery isn't getting a full charge... and that is indeed a big deal.
Re: Solar Upgrade Reply #28 – March 31, 2025, 09:05:56 pm I think the battery may still get a full charge, but slower than it could be. As the battery approaches full charge, the charging current decreases, the voltage drop (which is proportional to current) decreases, and the Blue Sky voltage will increase to approach the battery monitor voltage. 1 Likes
Topic: Solar Upgrade (Read 1932 times)
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Topic: Solar Upgrade (Read 1932 times)
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