[RE-wrenches] Off Grid Battery Charging

[James Jarvis]

Bicycle charging her L16 battery bank would be fine waste of effort. In
good shape she might be able to make 200 watts for some part of an hour
before being tired. Even Lance Armstrong in his peak probably wouldn't be
producing multiple kWh per day.

My $0.02 worth,

-James Jefferson Jarvis
APRS World, LLC
+1-507-454-2727
http://www.aprsworld.com/


On Thu, Mar 16, 2023 at 4:59 PM Larry Brown via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

>
> Wrenches
>
> I have a client that we did an off grid system for about 4 years ago
> The system is performing well
> The client would like to keep charged her batteries in the winter with her
> stationary bicycle operating a small generator
> Right now she uses a grid connection that was available and she turns on a
> breaker if needed to charge the batteries in the winter through the inverter
> When the batteries are fully charged she turns the breaker back off
> No need for any back up other times of year
> That is the only use of the grid
>
> Her request was to be off grid
> This set up eliminated the need for her to have a generator for winter low
> light conditions
> So far all is working as designed
> But there is talk of adding a gas generator so that if the grid is down,
> there is a back up available
>
> The system has 16- AGM Concorde SunXtener Batteries configured in 2
> strings of 8 batteries per string
> They are PVX 3050T 6 volt batteries operating at 48VDC
> They are charged from the PV Array by 2- Schneider Conext MPPT 80 600
> Charge Controllers
> The system has a Schneider Conext XW+ 5548 Single Inverter
>
> Any thoughts or ideas of what equipment can be matched with a stationary
> bicycle that might give a trickle charge to the battery bank
> Anyone ever played with setting this up?
> She wants to try this out and see what is possible
> Get some winter exercise and perhaps keep the batteries as close to full
> without using the grid or a back up gas generator
>
> All suggestions welcome
>
> Thanks
> Larry
>
> Larry Brown
> Sun Mountain
>
>
>
>
>
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