I agree with Chuck's math/costs. That's about where we were on our 6kW installation NET federal tax rebates. And now we get to tell folks to turn where the big solar array is. ;-)
For completely off-grid, you need to go considerably larger on the array and then have some storage method. Tesla has not come anywhere close to making that economical yet (nor has anyone else?). On Tue, May 5, 2015 at 1:05 PM, Paul Stewart <[email protected]> wrote: > Thanks …. I need to do some math and revisit this topic. > > > > At my house, we have the option to sell excess electricity back to the > grid at seriously inflated prices but with limitations on how much you can > sell. I’m more interested in having enough capacity to come completely off > the grid and be sustainable ;) > > > > *From:* Af [mailto:[email protected]] *On Behalf Of *Chuck McCown > *Sent:* Tuesday, May 5, 2015 12:21 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] This is going to make a great UPS > > > > $1/watt cost of parts if you do it yourself. > > > > Take your annual kWh usage. You can normally download your records from > the power company or they will send them to you. Say you use 18,000 kWh > per year. Divide that number by 3 and that is a reasonable size of wattage > to install. So in this example 6000 watts. If you are in a net metering > situation, that will eliminate 2/3rds of your power bill. > > > > That will cost you about $6000 if you are careful in purchasing. > > > > *From:* Paul Stewart <[email protected]> > > *Sent:* Tuesday, May 05, 2015 10:06 AM > > *To:* [email protected] > > *Subject:* Re: [AFMUG] This is going to make a great UPS > > > > Wow… that is really interesting … I looked at putting solar at my house > before and the number of panels, the cost etc didn’t make it worthwhile. I > was quoted $25k in panels at the time … think I may revisit though and get > additional quotes ;) > > > > BTW – a friend of mine has a Tesla S and loves it… I’m seriously > considering one now as well > > > > *From:* Af [mailto:[email protected] <[email protected]>] *On > Behalf Of *Chris Wright > *Sent:* Tuesday, May 5, 2015 11:31 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] This is going to make a great UPS > > > > I don’t know how many cycles it can handle, but max draw per pack is 2kW > continuous, 3.3kW peak. > > http://www.teslamotors.com/powerwall > > > > Chris Wright > > Network Administrator > > Velociter Wireless > > 209-838-1221 x115 > > > > *From:* Af [mailto:[email protected] <[email protected]>] *On > Behalf Of *Bill Prince > *Sent:* Friday, May 01, 2015 10:38 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] This is going to make a great UPS > > > > I would want to run it DC, but it ain't bad. We're paying in the > neighborhood of $1500 for about 5KWh with SLA batteries, so this would be a > serious consideration. > > I'd like to know what the maximum draw-down is, and how many > charge/discharge cycles, etc. etc. > > bp > > <part15sbs{at}gmail{dot}com> > > > > On 5/1/2015 10:20 AM, Peter Kranz wrote: > > I want to see more specs, but a 10kWh AC UPS for $3500.. �that�s a > decent price. > > � > > http://www.teslamotors.com/powerwall > > � > > > *Peter Kranz*www.UnwiredLtd.com <http://www.unwiredltd.com/> > Desk: 510-868-1614 x100 > Mobile: 510-207-0000 > [email protected] > > � > > > -- Harold Bledsoe
