Solar savings

Solar panels

Kelly and I had been wondering how much money we are saving with our solar PV system, so tonight I worked a little spreadsheet magic. Bottom line? Our electric bills so far have been half what they were the year before. Here’s how it all looks:

Date        Amount  Prior Year  Difference  Percent Savings
02/28/2014  $36.79   $72.91     $36.12	    49.54%
01/31/2014  $40.78   $79.75     $38.97	    48.87%
01/03/2014  $38.86   $67.66     $28.80	    42.57%
12/04/2013  $33.89   $65.84     $31.95	    48.53%
10/31/2013  $27.70   $60.49     $32.79	    54.21%
09/27/2013  $56.45  $112.77     $56.32	    49.94%
08/30/2013  $83.30  $140.69     $57.39	    40.79%
08/02/2013  $34.71  $143.40    $108.69	    75.79%
07/03/2013  $69.41   $78.15 	 $8.74	    11.18%
05/31/2013  $68.00   $70.30 	 $2.30	    3.27%

There are a couple of things to keep in mind here. First off, this is a simple comparison of charges between this year and the last: it doesn’t adjust for variations in weather. A better comparison would be to adjust this by the actual kWh purchased but I didn’t want to get too complicated.
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Duke Energy’s net metering red herring

Power graph of a perfect solar day

Today was the perfect day for generating electricity from solar. Sure, it was blustery and cold but from a solar point of view you couldn’t ask for better conditions. The sun this time of year is hitting the panels at a sweet-spot angle, skies were absolutely cloudless, and the humidity was a low 22%. Thanks to these near-perfect conditions our solar PV system generated a whopping 23.4 kWh of electricity. In almost a year of having our panels I’ve never seen a higher total.

These absolutely clear days coupled with the fact that we haven’t had to run our air conditioner yet means that it’s more likely this time of year that we’ll bank more electricity than we use. The rest of the year we’ll cover 30-50% of our demand, so in essence our solar PV advantage will never be greater than right now. Continue reading →

Energy cost of snow days

You know, if I were a local reporter on the energy beat, I’d think it’d be very interesting to study how last week’s snow days affected our community’s energy usage. Did a near-week of school days cause our area to use more or less electricity and/or natural gas? Did our local businesses burn energy to heat and light mostly-empty offices during this time? What about the gasoline saved from all the school buses that weren’t running? Or the commutes that didn’t take place? How about the fleet of municipal utility trucks that constantly worked to clear our roads?

Unlike hurricanes and ice storms, last week’s snow caused relatively little damage to our electricity infrastructure. I think this makes an ideal situation to study because one can essentially rule out downed power lines as the cause of energy savings (if any). I’d love to see a breakdown of the energy costs of this recent break.

Century Drive Solar Farm

Century Drive Solar Farm (click to embiggen)

Now that the leaves are off the trees I’d been eyeing this solar farm near the Crabtree Boulevard exit of the Beltline. My daughter Hallie and I took a little time this afternoon to explore this installation.

According to the Raleigh Public Record story on it last year, the Century Drive Solar Farm was approved by the City Council in May 2013. At the time the property owners, J.T. Hobby and Son, stated that it could be 10 to 15 years before the land could support solar panels due to the land being a former landfill and in a floodplane to boot. Apparently they worked out some of the engineering issues because the panels have been present since the end of October, at least.

Raleigh Public Record says there are 4,000 panels here and the filing with the state public utilities commission [XLS] says the solar farm is 1 MW is size. Pretty cool to have a large solar installation in such a high-profile location!

Highlights of 2013: Activism

Frank Eaton films Hallie

2013 turned out to be a big year for activism. As soon as our Republican governor took office, our right-wing state legislature went to town dismantling state government (that is, except for a few juicy positions given to the governor’s cronies). A lot of citizens of our state are hurting now and instead of working to assist them, our state leaders are piling on the pain.

Times like these require standing up and being heard. That’s why our family attended a number of Moral Monday protests in Raleigh. That’s why we aren’t letting these guys off the hook come election time.

Hallie also got involved with activism this year, helping assemble the iMatterYouthNC climate rally and march on Halifax Mall. It took a lot of work and could have used more participants but at the very least it was an education in how these things are done. Hopefully it will spur other kids to join the cause, too.

Highlights of 2013: Solar PV installation

Solar PV deck

The year 2013 will be memorable for our installation of solar PV cells on our home. We had discussed going solar two years before we made the call to Southern Energy Management to get it done. In March we signed the contract and, once the permits were obtained, the panels went up in May.

We had a few bumps at the beginning when our inverter malfunctioned. The inverter is the heart of a PV system and ours would frequently send a jolt of overvoltage into our home wiring. After SEM came out and replaced the inverter everything has been working fine. Things have been running so smoothly we tend to forget that we’re a power station.

I blogged about my experiences with solar PV, which led to my friend Scott Huler pointing his Scientific American blog readers to my site. I enjoyed the attention and the extra blog traffic!

Our system doesn’t cover our complete electricity needs but it’s great to be reducing our footprint as much as we are.

Christian Action League boss claims to know God’s position on the Bonner Bridge

Apparently the good reverend isn’t familiar with Matthew 7:26: “But everyone who hears these words of mine and does not put them into practice is like a foolish man who built his house on sand.”

According to the Rev. Mark Creech, the Executive Director of North Carolina’s Christian Action League that’s him on the left – Creech, not God, those who side with environmental groups in favor of a longer and more sustainable bridge to replace the existing Bonner Bridge are acting counter to the Divine Plan. Creech said the following in an article that he authored and that was recently published in, among other places, the Christian Post

I also note that Dr. Creech provides no biblical references to back up his claim that a “biblical worldview” means that God wants us to plunder the earth:

The biblical worldview on the environment is that we should responsibly “subdue” (subjugate, restrain, control) and develop the earth and its natural resources in a way that best benefits the human race.

I don’t have any references to back up my position, either, but I’m pretty sure that’s bullshit.

via Christian Action League boss claims to know God’s position on the Bonner Bridge « The Progressive Pulse.

LED bulbs are the best, hands down

The best lightbulb ever?

Last week we had one of our CFL bulbs burn out in our recessed ceiling fixtures over the stairwell. It was less than five years old and due to its location is the hardest bulb in the whole house to replace. I managed to dislodge the bulb from its socket using a long light-bulb-changing pole (catching it in mid-air before it crashed to the ground), but the whole process made me determined to replace it with a longer-lasting LED bulb.

I’ve been thrilled to find LED bulbs at Costco lately. I purchased a fleet of them, with a couple of them being focused-light bulbs for my recessed fixtures rather than the diffused bulbs we’ve been using. Bad move! The spotlight-like light reminded Kelly of a sterile hotel room’s light. She would break out into show tunes while standing below them to make a point. It didn’t take more than a few songs before I realized this was not the kind of lighting we needed. Back to Costco it went.
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Fritsch: RTP has lost its edge

Highwoods CEO Ed Fritsch says what I’ve long said: RTP is a dinosaur.

Ed Fritsch, CEO of Raleigh-based real estate company Highwoods Properties NYSE: HIW, is blunt in his take on Research Triangle Park.He says RTP has lost its edge, and he questions whether there’s time to get it back.Fritsch, speaking to a crowd at Triangle Business Journal’s Power Breakfast at Prestonwood Country Club in Cary on Thursday morning, doesn’t pull any punches.Years ago, “we would show RTP properties and say, ‘this is the heart of the economic engine,’” he says.No more.

via Fritsch: RTP has lost its edge Video – Triangle Business Journal.

The ocean is broken | Newcastle Herald

This is a depressingly sad report from a sailor who reports that our ocean appears to be very, very sick.

Exactly 10 years before, when Newcastle yachtsman Ivan Macfadyen had sailed exactly the same course from Melbourne to Osaka, all he’d had to do to catch a fish from the ocean between Brisbane and Japan was throw out a baited line.

“There was not one of the 28 days on that portion of the trip when we didn’t catch a good-sized fish to cook up and eat with some rice,” Macfadyen recalled. But this time, on that whole long leg of sea journey, the total catch was two.

No fish. No birds. Hardly a sign of life at all.

“In years gone by I’d gotten used to all the birds and their noises,” he said.

“They’d be following the boat, sometimes resting on the mast before taking off again. You’d see flocks of them wheeling over the surface of the sea in the distance, feeding on pilchards.”

But in March and April this year, only silence and desolation surrounded his boat, Funnel Web, as it sped across the surface of a haunted ocean.

via The ocean is broken | Newcastle Herald.