Re: Starting my EZGO Marathon Lithium build.
I worked on the dash for Marty, got the battery monitor and radio installed.
I was able to cut the metal bracket so the radio could fit past it, and keep the hole for the mounting plug on the right side, behind the battery monitor.
We still need to get the wife's phone to tie to the radio, as she'll be wanting to play her Pandora through there.
I was a little worried at first, with leaving the radio on while she's working out in the yard, but according to the battery meter, with the radio running at a fair volume, there is 10-12 Watts of draw from the batteries. If you really crank it up, the draw goes up to 25 Watts.
The nominal voltage for these batteries is 3.84V. With 14 in Series, that gives me a nominal voltage of 53.76V. Each battery unit is already a 2P unit of 45Ah cells, so I have 14S4P of 45Ah cells, giving me an ideal 180Ah. They are used cells, and Battery Hookup sold them as 75Ah, instead of the full 90Ah. With two strings of batteries paralleled up my actual AH is somewhere between 150-180Ah. At that 53.76V, my kWh ranges between 8,064Wh and 9,676Wh. Drawing 12 Watts with the key and radio on will give me between 672 and 806 hours. That's between 28 to 35 days. I don't think we'll leave the radio running that long.
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