Re: [EVDL] "EV to ... home" ==> 2nd EV for 100% solar charging

[Robert Bruninga via EV]

I spent all day working up a web page to describe going off-grid
with two Nissan Leaf's serving as the home battery on alternate
days.  Fully charge one during the solar day while the other is at
work.  THen swap.

But as I finished he graphics, to my horror, I looked up the current
prices of used Leaf's and they have DOUBLED over the last year or
so due to COVID.  So the 50% or more savings by using a LEAF
instead of a powerwall is just not there now.

Anyway, here is the page for discussion...
http://aprs.org/off-grid-with-EV.html

Bob, WB4APR

On Tue, Oct 5, 2021 at 6:41 PM Robert Bruninga  wrote:
>
> Going off-grid:
>
> Buy a used Leaf as a second EV.  Charge each one on
> alternating days.  So you have a huge battery charging
> everyday from solar, and you have an EV for goiong to work
> AND you get THREE times the battery for the same cost
> as a powerwall!. (and a spare car)
>
> Bob
>
> > In Maryland it costs me $8/mo to be grid tied.
> > His cost is more like $70/mo or more!
> > I agree, I woiuld be buldozing a path to "off grid" designs there.
> > --
> > > Actually, it's even worse than that. 
> > > Now she  5 days a week.  That uses about 10kwh
> > > per day EV charging and, she has to charge mostly when the
> > > sun isn't shining.
> > >
> > > The new 'Solar Customer' pricing is $50 a month for grid
> > > connection plus about $15 a month for taxes and other fees,
> > > plus now instead of banking power for free, I get paid
> > > wholesale for each kWh I push and charged retail for every
> > > kwh I pull from the grid.  The difference is about 8 cents per kwh.
> > >
> > > So next year when this goes into effect I'll pay on average
> > > $36 a month for banking power, plus the $65 mentioned above.
> > > SO closer to $100 a month even though I'm net zero (well
> > > surplus actually) on power.
> > >
> > > I'm building a 10kwh solar charging station to offset most
> > > EV charging costs and then, I'm going off-grid.
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[EVDL] BMS question

[steve sawtelle via EV]

I guess this may qualify as an old-school question now.

About 12 years ago I built an electric motorcycle. I actually had it up and 
running, but other things got in the way and I am abandoning the project.  The 
rolling chassis will get back it's ICE and I need to find a home for the 7" Jim 
Husted motor and the controls. I have a new endeavor now - a small cruising 
sailboat (CLC Pocketship). I'm thinking of using a trolling motor as the backup 
to the sails and I hope to repurpose some of my 100 A-H Thundersky batteries 
for power. My batteries have been sitting for 10 years but still are at around 
3.25V. I need to cycle them to see if they are still viable of course. If they 
are, what BMS is recommended for them now? I did a  bit of searching but didn't 
see much.

-steve
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