PV System Detailed Specs

Installation Date :
Aug 21, 2018

Site Specs :
 Roof tilt : 37 deg
 Azimuth: 257 deg
 Covered Solar cell area : 527.1 Sq Ft
 Total system weight : 1,348 LBS 
Grid-tied, Net-metered to Utility grid.

Screen Shot 2018-08-22 at 3.01.02 PM

System Specs :
 Solar Cells :
Sunpower SPR-X22 Panels
 360W each
 41 LBS each
 Dimensions : 61.4″x41.2″x1.8″ (Super thin)
 Avg Panel Efficiency  : 22.2% (Highest rated efficiency in residential solar panels)

Solar Cell

Inverter :
 SolarEdge SE10000A (10.8KW Inverter) 
Max DC Voltage : 500V
 Max Output Current : 100A

IMG_2276.jpg

Installed View :

Screen Shot 2018-08-22 at 9.18.30 AM

Return on Investment :

Tax Credit :

The federal solar tax credit, also known as the investment tax credit (ITC), allows you to deduct 30 percent of the cost of installing a solar energy system from your federal taxes. The ITC applies to both residential and commercial systems, and there is no cap on its value. We would claim this on 2018 Taxes via IRS Form 5695. (NOTE: The allowable credit starts decreasing for systems installed after 2020. By 2022 it is only 10%)

SRECs :

Utility companies are subject to a regulation (RPS) that requires them to produce a specific % of their energy from renewables. Many states have a solar carve-out, which requires that a minimum percentage of electricity sales in that state come specifically from solar power.

This is where SRECs (Solar Renewable Energy Certificates) come in. SRECs are used to account for solar electricity production. To meet their RPS requirements, electricity providers obtain certificates (SRECs) which serve as proof that they have either produced renewable electricity themselves or paid someone who is producing renewable electricity for the right to “count” that electricity themselves.

A homeowner who produces solar energy can sell these certificates to their utility company. They will earn one SREC for every 1000 kilowatt hours (kWhs) produced by their solar panel system. Each SREC is worth about $350 in Massachusetts (2018).

Reduction in Utility Consumption :

House Move-in date : July 27, 2018.
System Turn-On Date : Sep 21, 2018.

Electricity Usage :

July (7/08 – 8/08) : 454 kWh (Pre-move in)
August (8/08 – 9/10) : 2071 kWh (post-move in, no Solar yet)
September (9/10 – 10/9) : 794 kWh (Solar installed 9/21)
October (10/9 – 11/8) : 689 kWh
November (11/8 – 12/10) : 775 kWh

System Performance :

Day 1 :

2018 End of year :

img_4761

New Tune – Revelations

This is a cover of Revelations by Iron Maiden. I played the drums, both Adrian and Dave’s guitar parts, bass and (sadly) vocals as well. Clearly the vocals are outside my range, but here it is nonetheless – Revelations.

https://soundcloud.com/skarmic/revelations

 

By the way the featured image on this post is of English poet G.K. Chesterton, whose hymn Revelations provided the inspiration for, and some of the lyrics to, this song.

 

Rubik’s Cube Solution – Final Layer

We have been getting into cubing lately.

The DaYan cube is great, as far as speed cubes go (you can get it on Amazon) :

I can remember the top (white) layer and middle layer solutions fairly easily, but start to reach stack overflow when it comes to the final (yellow in this case) layer.

So I’ve written down the final (yellow) layer solution below as reference :

Getting the cross :

If you have :

__|_x|__          __|_ |__
_x|_x|__     OR   _ |_x|__
|  |              |  |

Then do : FUR U’R’F’

If you have :

__|_ |__
_x|_x|_x
|  |

Then do: FRU R’U’F’

Getting the Yellow Corner Tops :

Orientation if you have 1 corner yellow :

__|_x|__
_x|_x|_x
Y| x|

Orientation if you have field goals to the left (and not 1 corner yellow):

|\
| \
\Y|\
\| \
\ |\
\|Y\____\___\___\
\ |    |   |   |
\|____|___|___|

Orientation if you have 0 or >1 corner yellow :

|\
| \
\ |\
\| \
\ |\
\| \____\___\___\
\ |  Y |   |   |
\|____|___|___|

OR :

|\
| \
\ |\
\| \
\ |\
\|Y\____\___\___\
\ |    |   |   |
\|____|___|___|

Then do this algorithm : RU R’U RU UR’

Getting the field goals :

Rotate U to get a solid face, or a field goal face, and move it to the back.

Do this sequence : R’F R’B BRF’ R’B BRRU’

Until you get all field goals, color match of field goals not important.

Getting the final edge pieces :

To rotate an edge piece clockwise do :

FFULR’
FFL’R
UFF

To rotate an edge piece counterclockwise do:

FFU’LR’
FFL’R
U’FF

New Track – The Portrait

This is a cover of “The Portait”, by Greg Howe. A song I wish I had written.

I played it on a classical guitar, and it’s recorded using GarageBand on the iPad with a touch of reverb. Straight mic input as before.

I did 3 takes, and edited together the best of those into the final track. Getting the volume dynamics even across the takes was more difficult than I would have expected. Would have been much easier if I was good enough to just play this straight through in a single take.

DR Volunteer Trip Summary

 

We spent a week this summer volunteering as a family with a children’s education nonprofit in the town of Monte Cristi, in the Dominican Republic. This is a summary of that trip.

The non-profit we worked with was Outreach360, which we chose because they met a number of criteria :

  • Established track record (these guys have been operating in the region for over a decade)
  • Family oriented programs that can easily incorporate younger children, including our 6yo.
  • Work that involves the betterment of conditions for children.
  • Education as the central theme.

Our flight arrived in Santiago around 3am on Saturday, and we chose to get some sleep at the Hodelpa airport hotel until 1pm Saturday when we were met by an O360 long-term volunteer, Catherine, who had come to take us to Monte Cristi, along with 3 other volunteers who had also arrived that day (Mark & Theresa, and Joyce).

The ride out took about 3 hours, and eventually we arrived in the dusty, arrid northwest coastal highlands of Monte Cristi.


In addition to Team Karim + Mark&Theresa + Joyce, there were about 12 longer term volunteers there who were part of a multi-week stint. The Manolo Tavarez center, where all the volunteers were housed for the week, was rounded out by 4 full-time O360 staff members.

Here is a view of the volunteer center :
After arrival, we spent the rest of Saturday afternoon getting acquainted with our quarters (we were placed in a small casita across the street from the main center – pretty spartan bunk-bed style arrangements, but perfectly functional) and given a quick tour of the surroundings – Lilo’s, the local grocery store, the Farmacía, etc.

Sunday was orientation, where one of the leaders went over the basic structure of the week. The program for the children runs Monday – Friday, but short-term (1 wk) volunteers work only Monday-Thursday, leaving Friday as a “Culture day” – more on that later. We also spent Sunday afternoon scouring the neighborhood handing out fliers advertising the coming week’s program, and trying to get children to come.


During the summer, Outreach360 operates as a “campamento” – essentially a summer camp-style learning environment for the children. There are 2 sessions each day (morning and afternoon), with average attendance running anywhere between 15-25 children at each.

The campamento itself was held a 15 minute walk away from the O360 house, at a building in the Solomon Jorge neighborhood.

Each day’s session basically started and ended with “Circulo”, where we gathered under a large orange tent and sang camp-style songs (our kids are still singing them – very catchy) in a large circle with the children from the neighborhood who came to camp that day.
The students were divided into 4 “teams” complete with names (ours for the week were Los Pulpos Misteriosos, Los Piratas, Las Estrellas Del Mar, and Los Tiburones) with corresponding team chants.

Each team had volunteers as group leaders (our eldest 2 acted as group leaders for Los Piratas, and Estrellas Del Mar) who led them through 4 classrooms : Health, Spanish/Literacy, English, and Environment. Here Arman is getting Los Piratas ready for lessons.

 

 

I was one of 2 instructors for the Spanish/literacy classroom, and Samina was one of 3 instructors for the Environment classroom.

Reviewing the alphabet.

Samina taking a break at the Environment station.

 

 

 

 

 

     Sarina and Domini became fast friends.

Safiya was a floater, and also performed a critical role in playing with the kids during recess.

Safiya also happened to have her birthday on wednesday, and got no less than 7 Happy birthday songs sang to her by the staff and/or children, in both english and spanish. Lucky kid indeed.

On Friday (culture day) we went to Dajabón, which is a town on the DR-Haiti border about 1 hour from Monte Cristi. The goal was to experience the Haitian market, where literally thousands of Haitians cross the border every week to sell anything from produce, clothing, cigars, and countless other variety of goods. Truly an eye opener.

Dominican guards looking on as Haitian vendors enter the market. The blue gates are the border, and we were not allowed to cross into Haiti.
This is a trip we had been looking forward to for a while, and once it came the week flew by – it was a lot of hard work, and thoroughly satisfying to engage with these children in a real tangible way. Definitely something we would love to do again some day.
A picture taken in front of El Morro, with the other 3 volunteers that were there during the week with us – the wonderful Mark, Theresa, and Joyce.