Most excellent info/ story !
Best I every heard.
At 53 MPH, whats the draw in kW ?
What VFD Do you use ?
Any link to it ?
On 13/05/2017 19:30, 63urban 63urban@gmail.com [electricboats] wrote:
>
> Here's what I do know as one that has tried it and to a level that
> most have not. Here are links to two videos. The first is a
> walk-around of a speed boat conversion where I bought a brand new 2016
> Bayliner 175 Bowrider, pulled a brand new 3.0L Mercruiser motor and
> replaced it with HPEVS AC34X2, 147 HP Dual AC Induction motor. It has
> a top speed of 53 MPH. It cruises nicely at 20 MPH. The battery pack
> consists of 10, 54v, 100 amp cont., 150 amp peak, Smart Car modules
> made by Tesla. The chemistry is lithium-ion because of it's power
> density. The modules are wired 5 in parallel and 2 in series. I do NOT
> use a BMS. I simply bottom balance the modules upon the initial install.
>
>
> Here is my secret to managing the packs. First, regarding
> overcharging, I take a simple approach. I do NOT fast charge. I use a
> 110v charger with a max discharge of 12a. Yes, it can take up to a
> full day to charge, but I don't care. The intent was to go out on the
> water for a couple of hours, then charge overnight in the slip. The
> charger has been programed to shut off when pack is fully charged.
> Simple. With respect to over-discharging, simply don't do it. There
> are a number of SOC meters that will tell you exactly where your at
> with current draw. I know exactly where to be. The modules are 100 amp
> continuous rated, I have 5 in parallel, I do not exceed 500 amp
> continual pack draw. I usually draw between 350 and 400. Even after
> long continuous runs, the batteries never get warm to the touch. I ran
> this boat an average of twice a week last year and have experienced
> less than a 2% loss. The Model S modules have a 500 amp continuous
> rating and a 750 amp peak.
>
--
-hanermo (cnc designs)
Posted by: Hannu Venermo <gcode.fi@gmail.com>
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