Showing posts with label solar. Show all posts
Showing posts with label solar. Show all posts
3.01.2015
a real live Austin electric bill (with solar)
We were as excited as a herd of bonobo monkeys at a Viagra conference this week when our first electric bill with solar arrived in the mail! How did we do?
Looking at the bottom line--the dollars involved--it's easy to see how we did: We reduced our final bill by slightly more than half. Our final bill was $28.22 after being reduced $30.85 due to the solar credit. With all the "reads" (and the lack of paperwork explaining what it all means), it's a little harder to figure out what's going on.
The first thing to note is that the bill refers to two meters because we (ahem) now have two meters: One connected directly to the solar system and the other connected to the city supply.
Solar PV Read is easy enough: That's what we generated from the photovoltaic system.
Whole House Consumption is easy enough as well: That's the total amount of electrical use for the billing period.
Based on adding, subtracting, and comparing, Delivered Read is the amount of electricity delivered to the house via the city.
Received Read is the amount of electricity we generated that went back out onto the grid. In other words, we were generating more electricity than what we were using. This is the electricity the city received from us.
Net Read is the difference between Received Read and Delivered Read and is what the city delivered to us when we're given credit for the extra we gave them. Net Read plus Solar PV Read equals Whole House Consumption.
The way the billing works is that we get billed for the total amount of electricity we used (Whole House Consumption) as if we didn't have a solar system. That means we "benefit" from all the associated fixed charges and up-charges from typical power consumption. However, we then get credited with the Solar Credit. Tier 1 charges (for the first 500 kWh) come in at $0.06575 per kWh (building in the regulatory and power supply adjustment charges). Tier 2 (for use greater than 500 kWh) comes in at $0.1038 per kWh. The Solar Credit clocks in at $0.113 per kWh (not sure what it's tied to, but it seems to be the fully adjusted Tier 2 cost). That's a pretty good deal for us since we're getting paid twice for what we would have gotten charged for 159 kWh. Once we hit the cooling season, it's doubtful we'll continue to see that benefit.
The other interesting thing about the billing this month is that the bill from the city only includes electricity: No water, sewer, or solid waste charges. Did we get a Solar Credit for that (I know: I'm dreaming...)? Did they forget? Or is it coming under separate cover?
2.22.2015
sunny side up: live solar monitoring
What you see above is our solar power generation for the past Saturday. Not a great day because it was partly cloudy (and you can see where the clouds come and go). At the start of the week the solar folks came up and got us hooked up for live monitoring, and it's a hoot (as you know, I'm all about the data...). The live tool has a number of ways of looking at the data over various time spans. Here's what happened over the past week:

And here's the same data presented in a different (and more detailed) manner:

At any given moment, we can also see what the generation is on the actual array on the roof:
and get some info on generation during the month:
as well the environmental benefits:
and power and moola saved:
1.18.2015
We have the power: Our solar system is up!
It's been overcast round these parts for a few weeks, so it was only appropriate that the day the sun came back is the day our solar system was finally turned on. This was an adventure that started back in early August when we signed a contract, the system was then installed in early September, we then got red-tagged by having the rainwater tank too close to the electrical box, got the tank moved in mid-December, and finally (finally!!!) got the green light from the city to turn the whole thing on last week.
Yay!
It's terribly exciting. We've been out every evening to see how much sun we're soaking in.
11.05.2014
water and electricity do not mix: conflicts between solar and rainwater harvesting
And then we got red-tagged.
Red-tag means the inspector found something that prevents him or her from green-lighting the project.
The problem? We placed the rainwater tank too close to the electrical box. We need to be about 36 inches away, and we are 25 inches. That. my friends, is a serious bummer.
And it gets worse.
The bid to move the tank 11 inches came in at $3,500. Yikes!
We're presently getting a bid on moving the electrical service, but I don't expect that to be cheap either.
The moral of the story? "Make sure the dang tank is not too close to your electric box." or "Use a local vendor familiar with the local code to install the tank." The misplacement is on us since we used an out-of-town vendor that required us to identify and prep the tank site.
It sucks to make expensive mistakes. Live and learn.
9.07.2014
(almost...) Collecting the sun!
The solar installers came this week and began installing solar panels and associated electrical connections. The above photo is after an afternoon or so of work installing solar panel support structures. Because the roof is clad with standing seam galvalume, it's relatively simple to install the supports by clamping them to the standing seams:
The next morning the installers came out and installed the panels themselves and left behind the inverter for the electrician:
And then either Thursday or Friday the electrician came out and connected the system into our electric box:
You might have noticed that there isn't an electric meter yet: The solar company is waiting for a city inspection (and subsequent meter) before we go live. Yippee!
All in all a nice and clean install. Can't wait to start actually collecting sunlight!
8.05.2014
solar powered
We designed our garage to place solar on the roof, orienting the roof toward the south (aesthetics would have had it draining to the east) and roofing it with standing seam galvalume instead of TPO (sturdier way to fix panels to a roof). After having three vendors look at our situation (one of which never got back to us...), it turned out that very little (1 kilowatt) of the garage roof would be eligible for the city rebate with some more of the house being eligible (but us not willing to put solar on the house [for various reasons]). The main eligibility issue was interference of the neighbors trees in the dead of winter. That was a bummer, 'cause we're golden in summer with sunlight.
However, after pondering the situation as well as the 33 percent federal tax credit, which has no roof-must-be-unobstructed-365-days-a-year, we decided to take the money we had set aside for solar and do it anyway for as far as that money would go.
As it turns out, that money goes a long way!
After a recommendation from the Green House Lady, we choose Native to install our system. Based on their analysis, a 4.5 kilowatt system, which will fill the garage roof, will provide about half of our yearly electricity (6,300 kilowatt hours of our yearly power needs, estimated at about 13,764 kilowatt hours [I estimate about 12,500 a year, perhaps as low as 10,000 a year having made the switch to gas-only heating, but we shall see...]).
Those are the hypothetical solar cells on the garage on the right hand side of this aerial photograph.
Native estimates peak summer usage at 1,800 kilowatt hours; last year we peaked at 1,300 kilowatt hours. After switching our thermostat to prefer gas over electric for winter heat, I think our winter usage will be around 700 kilowatts per hour.
Payback on this system using Native's numbers is estimated to be 12 years. Studies show that solar systems add value to a home equal to the value of the system (and then appreciates thereafter). Given that, we'd be getting a 10 percent return on investment, not including appreciation.
The system we're getting installed is the LG-300 and consists of 15 panels with a Solar Edge inverters with 15 DC optimizers. The optimizers work like micro-invertors (but cheaper) by allowing each panel to generate power independent of the others such that shade that may impact the performance of one doesn't impact the performance of all.
We're excited to get the solar up and running, especially the bride, the power broker (and engineer) in our marriage!
Native expects to install the panel in four to six weeks.
7.21.2013
cursing architects, flored, cats, fans, scarfs, hooks, viewscapes, carpentry, solar
cursing the architects...
The architects sent a note asking (tongue in cheek [I hope...]) if we were cursing them yet. Not at all! The house has been easy living, literally instantly comfortable (I'm sure because of their good design). The clerestory windows are great, art unto themselves framing the trees and skies beyond in addition to letting in light. Everything seems right-sized. We had a dinner party last night, and all (usage of the space) went according to plan, the wide dining room allowing us plenty of room to bus the table and take care of our guests. And the peninsula did what the bride hoped it would do: Keep the hordes at bay with folks only congregating at the lee side.
biggest surprise (so far)?
How quiet the house is. I'm talking crazy, way-out-in-the-country-married-to-your-first-cousin quiet. Yes, we are experiencing a bit of the bookends of residential noise having just moved from downtown and, before that, living in an 1800s house with single pane windows (and no insulation), but it's so quiet here I can hear my blood flow at night. All that insulation (and sealing) and double-pane windowing seems to have really sealed the house off, and this is a good thing. Been sleeping like a baby (without the whole pooping-in-your-pants bit). It's truly amazing.
flored
The folks at flor really really liked our Eileen Gray rug, so they asked for a nice photo that they can use in their lookbook. After waiting for the proper intersection of light, cat placement, and cat positioning (i.e., not grooming his crotch), we hit sun-cat-flor gold last Friday morning:
Gorgeous!
does the cat approve?
Speaking of the cat, you might be wondering: How is he enjoying the place? Since it was before we had read the book that warned architects about clients that include cats in their program, we included the furry beast in the program, asking for windows he could look longingly out of, places to sun, and a place to poop.
An except from our "prospectus" from way back when we were courting architects the second time around. The cat's favorite architect, Shigeru Ban, is famous for using cardboard (aka glorified scratching posts).
(yes, his peepee is white...)
Sun-drunk and catatonic.
Oh for Gawd's sake, have you no shame!!!
We often find the cat looking (longingly) out the windows, watching the world go by. And sometimes he's where he really shouldn't be...
Looks like you have more room for Schindler books up here...
our biggest fans
Speaking of bookshelves, we have them in better decorating shape. I went up to storage last weekend with the mission of finding (1) my antique fan collection and (2) the mixer. I found the fans after looking through half the boxes and found the mixer in literally the last box I looked in, the box in the far bottom corner. Free tip: If you are putting stuff in storage, keep the things you are likely to want sooner rather than later in your new house toward the front (and mark those boxes!).
There are so many fans that I had to go into panorama mode on the phone to capture them all:
I know, I know: Not exactly minimal. I'm calling it "controlled maximalism" where stuff is "centralized" in restricted areas and presented as either multiples of the same thing with variation (for example: fans, books) or a number of items from the same color family. We're doing this in the kitchen as well:
Multiples with variation.
Stuff from the same(ish) color family.
The experiments are continuing. Progress reports forthcoming...
found the scarves
There they are!
on the hook
We waited until we moved in before we decided where various hooks and fixtures (toilet paper holders, towel hooks, etc.) would go. This procrastination gave us the ability to see how we use the space and explore options before installing hardware (the bride, being an engineer, wants stuff installed where it makes the most utilitarian sense whereas I'm also concerned about aesthetics. It's a delicate negotiation).
We decided we needed hooks in several places. Then the question became: What kind of hooks? We went with sticks by Umbra. Umbra makes a lot of cool modernish/inspired stuff this side of affordable.
Below is a hook for a hand towel in the master bath that matches the toilet paper holder. Neoplastic, baybee! You can also see what we are going to upgrade the switches and plugs to...
drainage
Have had several good dowsings the past week or so, so we've had a front row seat to drainage off the roof and site. So far, it all looks good with the gravel over yonder doing exactly what I hoped it would do: Capture runoff and direct it toward the front of the lot. Worked like a charm.
Added bonus: The rains have caused cute little mushrooms (that tastefully match the house...) to momentarily sprout out of the mulch.
Along those lines, the Aggie Zoysia (drought tolerant) is doing quite well in the back yard. I'm sure the rainfall has helped immensely. My plan is to not mow it and see how high it gets. If it doesn't get too high, the plan is to never mow it.
The feather grasses are doing well as well. We've only lost one so far. Still thanking the brilliance of the builder for using PVC instead of the cardboard I suggested (I feared getting the PVC level with the concrete, but the builder and sub did it perfectly). The PVC keeps the moisture from wicking into the bordering concrete and thus keeps it with the plant.
The grass in the driveway is starting to come in. At the moment, it looks like me trying to grow a beard (i.e., a post nuclear war radioactive patch party). We'll have to be patient here, but at least there's some green.
hot tub
Got the hot tub out of storage and placed behind the master. The grey wood panels just about match the grey on the house. Love how the tub is not visible from inside the house.
I generally find hot tubs ugly, but I think this actually doesn't look too bad here. Simple geomteric design (that is, the darn thing's round) in a complimentary color. I think it works.
viewscapes
While decorating, I'm taking into consideration how stuff looks from afar. You can use stuff from afar to guide people around the house. You peak their interest, and they will go investigate. I also like having some unexpected things in the house, things you wouldn't expect to see in a modern house. Surprise (and hopefully delight) is good.
An old German telephone.
Peeking in the powder.
Looking toward the master suite. With (nearly) everything being white, the art really pops.
Test placement in the first landing of the stairwell. I love to walk alleys and found this painted piece of plywood a number of years ago in an alley set out for bulk trash pickup. Whoever painted it is talented, but not talented enough to draw/paint hands (something that's really hard to do). Nevertheless, I love it for its simultaneous success and failure. A parable of life...
future carpentry
Had our carpenter, Dan (who's also a friend; he built the Eileen Gray table for us), stop by to discuss doing a bit of work, namely the shelves in the bathrooms (ate through that entire budget with the cabinets...) and the built-in desk in the guest room. We're going to do what the architects suggest as far as placement but will go with hickory rather than MDF painted white [muffled gasps from the architectural galley...]. We needed to monkey with shelf heights in the guest bathroom since a shelf as designed would go right through a switch plate. Simple planks with no visible support.
We're also going with a simple hickory plank for the desk pulled about two inches off the back wall to allow wires to drop to the plugs below. In other words, there will be a two-inch gap along the entire back of the desktop. I suppose there are a number of reasons why this is unwise, but screw it: It's our house. "Neoplasticism over logic!" I often yell from our back door (fortunately the neighbors' haven't called the police yet...). Dan and I talked about the strength of the desktop and its ability to withstand some yahoo standing on it, a kid jumping off it, and (perhaps...) rambunctious lovemaking. We'll leave the desktop thin to serve as a visual pause button; Dan says it will bend, not break, if perpetrators are clueless(ly drunk).
Dan is also going to make some modifications to the bookcases downstairs to hide the LEDs and accent horizontality.
solar
Had a solar dude come out and scope the garage roof for panels. He had a cool little reflective device that told him the solarability (my word) for the full year. We can get 2.5 kilowatts on the roof with no tree trimming, and (pleasant surprise, surprise) 5 kilowatts if a branch gets trimmed back on a nearby tree. The issue with that branch is that although it is over our property (and therefore we can legally chop it down), it is attached to the neighbor's tree. The solar dude, to his credit, suggested we talk to the neighbor before hacking on the tree and weigh neighbor relations heavily in any decision to extend solar service. I think the neighbor will be fine (he already gave us the unsolicited green light to trim a lower branch), but we'll give him veto power over trimming that more prominent branch.
Waiting on the cost before talking to the neighbor. No sense in bringing it up if we don't need to.
coda
That's it for this week. There's a lot of other things going on, but that's all we have photos and energy to write about this week. Until next time!
Labels:
architect,
color,
critters,
decorating,
driveway,
fans,
flooring,
gate,
landscaping,
poop,
solar
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