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jonaslobitz avatar image

BMV-700H - For EV Conversion SOC Memory Erased

I have wired in and mounted a BMV-700H on the dashboard of an EV conversion. I have the BMV settup so it turns off with the ignition to reduce the parasitic drain on the main EV battery pack however every time the BMV resets / I turn the car on it seems to erase the SOC and Ah reading memory and reads 100% SOC and 0Ah. Is there any way to prevent the BMV from doing this or can I just not switch off the BMV to have an accurate SOC reading?

BMV Battery MonitorSOC
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JohnC answered ·

Hi Jonas. You'll need to leave the BMV on for it to retain anything. It's power draw is specced at <4mA (backlight off). That's pretty low, a little like a wall-clock you never turn off. At 12V, 0.05W.


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