Who, or what, is West Mountain Radio you ask? And what do they have to do with electric boats?
You may want to check them out if you have a big batch of batteries you want test, like I did.
I purchased one of ther Computerized Battery Analyzers (CBA) some years ago. Install their sofware, attach the CBA to your computer, and attach a fully charged battery to it. You can run a discharge test (among others), and capture a user-configurable graph of the discharge cycle. However, because the CBA units are limited to 200 watts, the discharge rate with a typical 3.2v (nominal) LiFePo4 battery cell is limited to about 50 amps. If you have 38 cells of 200Ah or more capacity to test, the testing hours really add up!! West Mountain Radio has the solution in the form an "amplifier" that increases the limit to 500 watts. With that device, I was able to perform 1/2 C discharge tests of 280Ah and 200Ah battery cells at the rate of 4 a day! What was even better was that, although the WMR 500 watt amplifier costs $730 to buy, they have units available for short-term rental at the reasonable rate of $30 a month.
Got a bunch of batteries to test? You may want to check 'em out! ... https://www.westmountainradio.com/cba.php
[-tv]
Plainwell, MI
"Grace O'Malley"
Cape Dory 27
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