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My system consists of:
1 x Lithium HE battery 24V / 200Ah
1 x MultiPlus C 24/2000/50 (Latest firmware 433)
1 x Lynx Ion BMS 400A (v1.14)
1 x Color Control GX (v2.23)
The system is running DVCC. In the screenshot below the SOC shows as 75%. As it's a 200Ah battery surely the consumed Ah should show as 50Ah but it shows as 37.5Ah. Conversely if the 37.5 Ah is correct then that means the battery has a capacity of 37.5 x 4 = 150Ah.
Am I missing something, any idea what is going on?
Hey John, I know I owe you an answer on this one :-). And I’ve asked and know it now:
The Lynx BMS has two modes: default, and performance.
In default mode it offers limited capacity to ensure a longer battery life. Its limited to ~75% of the capacity.
In performance mode it allows 100% of capacity.
Thanks Matthijs That now makes sense, thought I was going crazy!
Your answer begs the question what is the Cycle Life @100% DoD (0,3C) and @75% DoD (0,3C), as in the datasheet we just give Cycle Life @80% DoD (0,3C) as 2000 cycles.
How does one enable performance to get the full 200Ah / 100% as that is preferable in my application, subject to cycle life answer?
A nice surprise to be able to have 5kWh of useable energy in performance mode compared to the 4kWh I assumed from the datasheet @ 80%DoD.
(Edit - I have discovered that changing between default and performance can be done with the BMS tool available in https://professional.victronenergy.com/downloads/firmware or it seems the facility will likely be available soon via the CCGX/VRM. As the cable for the tool is expensive, waiting for it via the VRM seems preferable.)
Hey John; as you discovered yourselves, it can be done using the PC software called "Lynx Ion BMS tool"; available on Victron Professional in the downloads/firmware section.
Yes this requires a USB-CAN device; and yes they are expensive.
There are no plans that I know of to make it possible to change that in a different way in the near future. Long run for sure; yes.
We do lend those can devices to our dealers btw.
