Interesting thoughts. For our current grid-tied PV system we 'sell' excess electricity to the electric company and then buy it back at night or cloudy days. A couple of months in the spring and again in the fall our electric bill is $8.00. Nice A year ago our January electricity bill was $171.00. That was the highest bill than we had had for 10 years - a time before we added solar panels. A quick check with the NOAA website showed that the weather was not any colder a year ago than over the previous 10 years. I'm sure that the electricity company is just gouging the guy who has a PV system at his house. If I had not raised a fuss at the electricity company office I'm sure that more than the January bill would have been ridiculously high. There is constant effort to reduce or eliminate net metering in Louisiana. Our 'do as little as possible to help the people' government is of little help. They help the corporations, not the people.
BobK, Forest Dynamics On Jan 18, 2016 9:28 AM, "Robert Bruninga via EV" <ev@lists.evdl.org> wrote: > > I'm in no hurry to start the EV project [until after I] > > ... add more PV panels and batteries so I can go off grid, > > And why on earth do that? > > Going off-grid will cause you to throw away $2 out of every $3 you invest > for the rest of your life in battery maintenance and replacement. It makes > no sense when storage in the grid is basically free (in good Net-metered > states). Around here the trade off is like this for a 10 kW system. > > Compare paying $8 a month (minimum utility bill) compared to: > > Going off grid and doing y our own storage: > > 1) Having to invest $10k in two Tesla Power Walls to get 4 kW of average > power > > 2) SPend another $10k every 5 years to replace it due to being worn out > > 3) And that assumes only 80% depth of discharge > > 4) So you are really only getting 3.2 kw and only storage for 5 hrs a day > > 5) Weather in Maryland can easily go 5 days of no sun. > > 6) That is 125 hours of practically no sun input for a $10k system that can > only run for 5hrs is a really, really, drastic life style change. > > 7) If wife demands same lifestyle and zero inconvenience, you are going to > need 25 more power walls and that's another $125,000 you need to invest > every 10 years. > > 8) AND this is only in the summer when your solar input is TWICE what it is > in the winter. So you have to reduce your life style in HALF every winter > when life is miserable enough as it is. =OR= > > 9) You double the size of your solar array and battery system to maintain > the same lifestyle in the winter, but now you have a $250,000 system that > you only need fully half the year and the other half the year you have to > THROW AWAY or WASTE half of your summer power because it would take another > 4000 powerwalls ($20 million)to store up SUMMER power for use in the > winter. > > No, compared to $8 a month, Ill stick with Net Metered grid tie and get $3 > worth of electricity value from every $3 invested compared to only $1 worth > of electricity for off-grid. > > See http://aprs.org/off-grid-NOT.html > > bob, WB4APR > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160118/59d68e4a/attachment.htm > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160123/4526b0a6/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
