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Trev Guru Joined: 15/07/2006 Location: AustraliaPosts: 640
Posted: 10:02am 02 Jun 2020
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I have now charged the 8 cells of LYP. Did a quick rough balance. Discharged through the PL60 to measure the Ah that are drawn off. Connected up two spotlight 100W bulbs as the load.
Load as 11A and starting the Ah counter from zero.
With lowest cell down to 3.08v while still under load... Measured 160Ah out before the internal clock changed to a new day, then measured another 52Ah out. Total Ah out is 212Ah. Not bad from a 400Ah pack that is heading up to 8 years old,used in an EV, and discharged to empty every day on the solar system. (Edit: thought I should explain why I wrote 400Ah. They are 200Ah cells but I have 2 in parallel making 400Ah 12v pack. Discharge happened with 12v spotlight bulbs.)
The lowest cell voltage jumped up to 3.13v after the load was removed. According to the discharge curve I took out around 85%
Edited 2020-06-02 20:07 by TrevTrev @ drivebynature.com
Old Seagull Man Regular Member Joined: 21/12/2019 Location: AustraliaPosts: 55
Posted: 12:40am 03 Jun 2020
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Thank you, for the info. OSM
Trev Guru Joined: 15/07/2006 Location: AustraliaPosts: 640
Posted: 10:36am 11 Aug 2020
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Just need to say.......... The LYP cells were snapped up quickly. Sold! The LFP cells are still here and are a giveaway.Trev @ drivebynature.com
Trev Guru Joined: 15/07/2006 Location: AustraliaPosts: 640
Posted: 02:48am 27 Oct 2021
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I should have posted here a long time ago ... The LFP cells have been taken and re-commissioned in another solar system .... they live on!Trev @ drivebynature.com
Trev Guru Joined: 15/07/2006 Location: AustraliaPosts: 640
Posted: 11:39am 03 Aug 2023
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I was at the place where these LFP cells went to back in April 2023. 16 of the cells were still in operation, 2 parallel, 8 series. 24v solar system. The owner was just here last week and picked up another 8 Winston cells x 200Ah, second hand from a stripped EV conversion. He said the 16 were still operating but with significant reduction in capacity. Remember... history check.... these LFP cells were very much abused in EV Hilux. They are now close on 15 years old. If they were new and used only on a solar system, they would be good for a lot longer.
LFP chemistry is said to be 2000-3000 cycle life. The new LYP chemistry is said to be 5000+ cycle life.Trev @ drivebynature.com
Trev Guru Joined: 15/07/2006 Location: AustraliaPosts: 640
Posted: 11:55am 03 Aug 2023
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We have been testing a new active balancer, called Heltec. It is brilliant.
Deligreen is great on smaller series packs like 12v, and does work on the larger 16 cell series strings, but Heltec is quicker and hold balance much better.
Trev @ drivebynature.com
pollenface Regular Member Joined: 01/09/2020 Location: AustraliaPosts: 47
Posted: 10:37am 11 Sep 2024
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Since no one has replied to you yet,
Yes the Tracer can be programmed for Lifepo4, I use an MT50 for parameter changes but you can also use an RS485-USB cable and PC software or the Bluetooth dongle and Epever App.
You could Select the GEL profile, then select USER as a starting point. Turn temp compensation to 0mv, float to 3.35v/cell.Off grid man caver
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