KiwiME
Well-Known Member
I bought this item because I noticed a UK owner had one on the SpeakEV forum. It's a voltage logger for a 12V car battery and is connected permanently across the posts, drawing a mere 1mA. It logs voltage to internal memory every 2 minutes and overwrites old data after 31 days. That data is accessible by the free app (both Android and iOS) when in Bluetooth range and is displayed on a graph in 24 hour segments, which you can screenshot. A cursor is available as well but there is no apparent way to download the data.
While using the app within range it updates and graphs every second. There are configurable low 'SoC' alerts as well but you have to be in range to get them immediately and so that feature may not be that useful for me, along with a couple of other inapplicable ICE-related options.
The logger is found on eBay as BM2. Fortunately, the install is an absolute breeze on the Kona EV and does not require loosening the post clamps, although you could do it that way. All I needed additionally were (2) M5 low-profile nyloc nuts and a small lump of Blu-Tack. The existing post clamps have just enough exposed thread to attach the spades on top of the clamps nuts. Using nyloc nuts assure they will not go astray if they happen to loosen. The spades need to be squeezed together carefully to encompass the 5mm stud. Obviously the Blu-Tack is used to secure the logger onto the battery but any other means is just as valid. The leads are solid core wire so you don't want to leave it hanging.
After installing the app I did not enable location access while not using the app. They say that's so it can connect automatically when you are within range and it's needed for the alerts.
I'm hoping to use this to characterise the 'aux battery saver' function and other conditions when the OBD port is not available.
While using the app within range it updates and graphs every second. There are configurable low 'SoC' alerts as well but you have to be in range to get them immediately and so that feature may not be that useful for me, along with a couple of other inapplicable ICE-related options.
The logger is found on eBay as BM2. Fortunately, the install is an absolute breeze on the Kona EV and does not require loosening the post clamps, although you could do it that way. All I needed additionally were (2) M5 low-profile nyloc nuts and a small lump of Blu-Tack. The existing post clamps have just enough exposed thread to attach the spades on top of the clamps nuts. Using nyloc nuts assure they will not go astray if they happen to loosen. The spades need to be squeezed together carefully to encompass the 5mm stud. Obviously the Blu-Tack is used to secure the logger onto the battery but any other means is just as valid. The leads are solid core wire so you don't want to leave it hanging.
After installing the app I did not enable location access while not using the app. They say that's so it can connect automatically when you are within range and it's needed for the alerts.
I'm hoping to use this to characterise the 'aux battery saver' function and other conditions when the OBD port is not available.
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