Agreed, Chuck! Will be interesting to see where it all ends up. One thing on my setup - I don't lose the grid. The grid is still connected as a backup to the islanded system, however the batteries and the power collected from the solar are first priority.
-Hal On Thu, Aug 31, 2017 at 9:36 AM Chuck McCown <[email protected]> wrote: > They were trying to add demand charges in Utah. That would have made me > off grid. But they have backed away from that. I think net metering costs > me something like $5 and it is worth it to have juice at night without > batts. > > *From:* Harold Bledsoe > *Sent:* Thursday, August 31, 2017 5:44 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] OT Home Battery Array, Generator and Solar > Readiness > This. > > We do systems like this as well using Cenga: > > http://www.cengapower.com/ > > If you are doing pure backup, AGM is hard to beat because of zero > maintenance, lower cost, and low cycles involved with backup only. > > If you want to island or go off-grid with part of the house with daily > cycling, the best choices are forklift batteries or lithium ion. Golf cart > batteries don't work out financially for daily cycling compared to those. > > The federal tax incentives makes adding panels essentially free. If you > are lucky to live in a state friendly to solar with state incentives, the > system gets pretty darn cheap! > > I personally am not a believer in netmetering anymore. I started out with > netmetering and ended up taking most of the house islanded. Why? The power > companies don't want to do it so they eventually will find a way to kill > it. My power company added a netmetering fee of $10/kW installed per month. > So I'm islanded now. > > Hal > > On Wed, Aug 30, 2017 at 8:30 PM Zach Underwood <[email protected]> > wrote: > >> 1 watt of lead battery does not equal 1 watt of lithium ion. With lead >> acid you can only take them to about 40-50% depth of discharge but with the >> lithium ion you can get like 80-90% depth of discharge. Also the number of >> discharge is only like 1000-3000 cycles where with lithium it can be as >> high as 9000 cycles. The number of cycles is less of a problem in a grid >> connected back up only but if off grid solar then with lead you would have >> to replace every 2-3 years where with lithium it could be every 5-10 years. >> When I was looking into solar this year the 10 year cost of lithium was >> cheaper then lead. >> >> Zach Underwood (RHCE,RHCSA,RHCT,UACA) >> >> http://ZachUnderwood.me >> >> advance-networking.com >> >> >> >> On Aug 30, 2017 9:13 PM, "Mathew Howard" <[email protected]> wrote: >> >> Tesla Powerwall looks to be 14kWh, so you'd be looking at about $2100 >> worth of batteries to get the equivalent. I don't see anything on Tesla's >> website about what size inverter it comes with, but from what I'm seeing on >> Google, it looks to only be 5kW. >> >> You'd also have to come up with some kind of a charger if you don't have >> solar. >> >> >> On Wed, Aug 30, 2017 at 4:17 PM, Chuck McCown <[email protected]> wrote: >> >> How many kWh is that tesla wall of batts or whatever it is called? >>> BTW, you have until November to file a net metering application with RMP >>> in Utah to get grandfathered into the better deal. >>> >>> -----Original Message----- From: Sterling Jacobson >>> Sent: Wednesday, August 30, 2017 3:14 PM >>> >>> To: [email protected] >>> Subject: Re: [AFMUG] OT Home Battery Array, Generator and Solar Readiness >>> >>> Ok. >>> >>> Is this easier to do with a APC Symmetra PC Power Array system? >>> >>> I found one for a good price for pickup 16Kva for $1800. >>> >>> -----Original Message----- >>> From: Af [mailto:[email protected]] On Behalf Of Chuck McCown >>> Sent: Wednesday, August 30, 2017 3:11 PM >>> To: [email protected] >>> Subject: Re: [AFMUG] OT Home Battery Array, Generator and Solar Readiness >>> >>> How many kwh is that? >>> Batts can be had for 15 cents per watt hour - or - >>> >>> $150 per kWh. >>> Inverters come in at 15-30 cents per watt. >>> >>> Lets say you want a 20 kWh battery, DIY it should cost $3K for the batts. >>> 10 kW will run most homes unless you have all the AC and clothes dryers >>> running at the same time. >>> So $1500 for an inverter. >>> >>> -----Original Message----- >>> From: Sterling Jacobson >>> Sent: Wednesday, August 30, 2017 3:03 PM >>> To: '[email protected]' >>> Subject: [AFMUG] OT Home Battery Array, Generator and Solar Readiness >>> >>> Looks like it’s about $6k plus installation for a TESLA Wall battery. >>> >>> Couldn’t I just get about 10 $165 batteries and put them in an array in >>> my utility room? >>> >>> I’ve got a Generac transfer switch that I haven’t hooked up. >>> >>> Ideally I would like to have ‘clean’ power through some sort of whole >>> home inverter/conditioner for regular utility power. >>> Then if the power glitches I would like to seamlessly run off a battery >>> array for a few minutes until the Generator comes online. >>> Then have a whole home generator on NG for any extended power outages. >>> >>> But I’m having a hard time finding online any sort of DIY or >>> sample/guide for electricians to make this. >>> >>> Is this not ‘normal’ now days? >>> >>> I don’t have solar, but would like to consider it in the future as well. >>> Wife doesn’t like the look of panels on the roof ☹ >>> >>> -- > > Harold Bledsoe >
