Danny S. Parker posted a blog post
Zero Energy Home Friends,My daily PV output from a 6.56 kW PV system has averaged 22.7 kWh/day over the last two years.kWh= AC kWh from inverter to gridirrday= cumulative kWh/m2/day plane of arraypvptmp= array temperature (F) taken on back on one of…
Aug 17, 2014
Danny S. Parker commented on Elisa Wood's blog post Momentum builds for energy efficiency...but is the wolf at the door?
"Certainly if everyone's economic time horizon is 3-4 years, the wrong decisions are being made. For me, this strongly argues for very progressive appliance and equipment efficiency standards. If the market can't act in a logical manner, require that…"
Jun 12, 2013
Danny S. Parker commented on Elisa Wood's blog post Momentum builds for energy efficiency...but is the wolf at the door?
"Elisa,
On the question of partnering with an efficiency team at the time of solar install for an EE audit and intervention, I think this is very often recommended by PV installers ("We will be providing you with 70% of your annual electricity consum…"
Jun 6, 2013
Danny S. Parker commented on Elisa Wood's blog post Momentum builds for energy efficiency...but is the wolf at the door?
"Elisa,  I agree completely. The reason there has not been significant push-back on efficiency thus far is that it is more difficult to manage and obtain big results swiftly, as with the case for net-metered home solar.

It is possible to remodel a h…"
Jun 5, 2013
Danny S. Parker replied to Danny S. Parker's discussion Phased Deep Retrofit Project in Florida
"Curt,

Homes with high dryer use wash a lot of loads of laundry. You can examine each site to see this at the website. All sites were examined and on audit, any with clogged dryer vents were cleared or avoided for monitoring (danger of dyer fires).…"
Apr 29, 2013
Danny S. Parker posted a discussion
Dear Pros,How much could be saved in retrofits that blanketed a large group of homes with simple measures collected detailed audit information and then came back to custom retrofit the homes in detail?Sponsored by the U.S. Department of Energy withi…
Apr 23, 2013
Danny S. Parker replied to Paul Stevens's discussion Peak Energy Saver
"Paul,

Fiction. Fraudulent is another good word.

This is another in a long-line of power factor "black box" scams.  Another manufacturer, KVAR, is particularly egregious, preying on gullible homeowners.

Note that there are always testimonials and…"
Apr 23, 2013
Danny S. Parker replied to Jason Raddenbach's discussion New PV system. What is your experience with different panel manufacturers?
"Hi Everyone,
Yes, I do think it is very helpful to keep your utility records.  In fact, I firmly believe that simple analysis of your utility records can be more illustrative than a lot of simulation (and I love simulations).

Key concept with a yea…"
Apr 22, 2013
Danny S. Parker replied to Jason Raddenbach's discussion New PV system. What is your experience with different panel manufacturers?
"Hi Jason,

Already had the 6000W inverter, so it was just a matter of expanding the number of modules on the racks.
Generating the graph was simple: I kept all the utility bills since I moved into the house in 1989 and then logged the power producti…"
Apr 16, 2013
Danny S. Parker replied to Jason Raddenbach's discussion New PV system. What is your experience with different panel manufacturers?
"Jason,

No better time than now.  Go for it. I am worried that net metering may soon be gone. Grandfather clause is a nice friend to have.

Don't believe that?  Take a look at what is taking place in San Antonio:
http://www.mysanantonio.com/news/ene…"
Apr 16, 2013
Danny S. Parker replied to Tom DelConte's discussion Energy Myths- Fact or Fiction?
"Tom,
I completely agree with all these except the first. There is an old, but well done empirical study showing savings from closing registers by Bill Levins at Oak Ridge National Laboratory.
Levins, W.P. 1988. “Experimental Measurements of Heating…"
Apr 11, 2013
Danny S. Parker replied to Doug Horgan's discussion Geothermal real-world performance
"At FSEC, we tested two geothermal systems in Florida, one vertical well and another open loop system. The systems were instrumented in detail in several very low energy homes. Performance of both was well below expectations as documented in this rep…"
Mar 4, 2013
Danny S. Parker posted a blog post
All, How much electricity is need to roast a Thankgiving turkey & the rest of the holiday cooking extravaganza? Monitoring baseline data from the Phased Deep Retrofit project being done by Florida Solar Energy Center for U.S. Department of Energy…
Nov 28, 2012
Danny S. Parker commented on Barry NewDelman's blog post Energy Myths
"Okay, I know the claim that cleaning refrigerator coils does nothing is wrong. Alan and the others should have measured more carefully. We have done so in several cases at FSEC and shown that the savings are about 10%-- mind you not enough to make i…"
Nov 28, 2011