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The Illinois Solar Schools Program: The Inverter

March 30th, 2015

When you hear about solar electricity, most people think about the solar panels. And there will always be solar panels. But if you follow the wires leading from the solar panel they almost always lead to an inverter. The inverter in this pix is a Solectria brand inverter. The inverter converts the DC (Direct Current) electricity (like that runs into your car battery to power your car radio and air conditioning and your lights and power windows) to AC (Alternating Current) electricity (think the electricity that powers your television and the lights in your classroom). If the switch is from DC to AC, it goes through an inverter and the pix shows an inverter. If the switch is from AC to DC, it goes through a rectifier. And DC electricity is something most of you use all of the time even if you are not in a car. Your lap top and your cell phone (when it is not connected to an AC outlet) are powered by DC electricity that is stored in a battery. You plug into an outlet where AC electricity flows through the wire to a small rectifier that converts that AC electricity into the DC electricity needed to power the laptop or cell phone battery. Most devices use AC adapters that allow you to power the device on AC power but also charge the battery inside the device on DC power. Basically your cell phone and most laptops run on both AC and DC power. So in many portable devices you use every day, these inverters or rectifiers switch either AC electricity to DC electricity or DC electricity to AC electricity depending on the device you want to use and how you are using it and in many of our most popular devices like cell phones and laptops they run on AC or DC power depending on whether it is plugged into an AC outlet or not. Companies that sell these products want you to find them easy to use so they make the devices useable in any situation. (I am not saying you will be able to get cell service but your device will have power.) And some things we are starting to see a lot these days are electric car chargers. To charge an electric car you typically plug into a DC charger. This takes DC power directly into your car battery without the need to convert the DC power to AC power because batteries run on DC power. If you plug in your electric car to an AC outlet (and many cars now can), then you need a rectifier in your car to switch that AC power from your outlet to DC and the more recent electric cars are (like your cell phone) able to be charged by DC power (quickly and more efficiently) or by AC power (it takes longer because the AC power has to be rectified back to DC power when it gets into the car and some electricity gets lost in the conversion.

Two New Solar Schools in Worthington Ohio

March 28th, 2015

Worthington, Ohio has two new solar schools! The first was installed on Colonial Hills Elementary School just east of High Street and just south of State Route 161, in the area known as Colonial Hills. The second was installed on Linworth Alternative High School which sits on SR 161, just West of SR 315. The pix below show that both solar school installations are awning mounted. Tim Gehring, with the Worthington School District, is the primary contact for both schools and has helped guide solar projects on several of the Worthington Schools. Both projects were done by Solar Cascade with founder Thomas Van Cleef as the primary contact at Solar Cascade.

Worthington Solar Panel

Worthington Solar Panel

Funding for these two projects came from a variety of donors. Canadian Solar donated the photovoltaic (PV) panels for both schools. Enphase donated the microinverters for Linworth Alternative High School. Tilton Automotive, Mary Ellen’s Starr’s family, The Columbus Jewish Foundation donated funding to the projects. Solar Cascade also donated time and materials and some funding and the Foundation for Environmental Education also donated some funding. And the Brian David Robertson Memorial Solar Schools Fund (BDR Fund) arranged for the donated equipment for both projects.

Solar Schools in Fairbanks Alaska

November 17th, 2014

There are technically three solar schools in the Fairbanks North Star Borough School District in Fairbanks, Alaska.  Two of them are solar electricity and the third is a solar thermal installation on the Weller School.  Larry Morris is the primary contact for the school district.  Larry is the head of the FNSBSD’s “solar school team” and a member of Facilities Management.

For the solar electricity projects the most recent installation is a 5.44 kW on the District facilities’ building on Minnie Street.  This is building where Larry Morris’ office is located.

What is different about the 5 kW PV project is the fact that the thin film panels are installed vertically due to the latitude of Fairbanks.  The angle of the sun makes the vertical installation attractive to the district because they have so many south facing walls.  According to Larry, “we are testing this thin film vertical type installation to see how it works for us.  If it successful, we will consider doing more of them in the future.”

Installing Solar Panels

Solar Panels

 

The panels are manufactured by United Solar Ovonic LLC based in Rochester Hills, Michigan.  A & A Roofing Co., of Fairbanks did the design and installation.

Here is a link to the data for the 5 kW installation

There is also a 1 kW on the 2 Rivers School.

Illinois Solar School at Einstein Academy

October 19th, 2014

There is a new Illinois Solar School installation at the Einstein Academy on 747 Davis Road in Elgin, Illinois.  The project was funded with a 90% cost grant from the Illinois Clean Energy Community Foundation.

Kojo Darkwa is the primary contact.

The installation consists of 4 US Multi Silicon Solar Modules and an Enphase inverter.  The panels are 250 watts each making the system a 1 kW (1,000 watts).

Illinois Einstein Academy

Illinois Einstein Academy

Illinois Einstein Academy

If you would like to see the data for the electricity generation at the Einstein Academy, the IllinoisSolarSchools.org web page can be found here:

http://www.illinoissolarschools.org/solar-schools/elgin/einstein-academy.php

There are 75 students at the Einstein Academy.

Illinois Solar School at Eisenhower Junior High School

October 4th, 2014
On Cass Avenue in Darien, Illinois  (just off I-55) there is a new solar school installation at Eisenhower Junior High School.  Robert (Bob) Carlo is the primary contact.  Illinois Clean Energy Community Foundation funded the solar school installation with a 90% grant that covered 90% of the total cost of the project.  ReneSola donated 4 of their 250 watt PV panels through the Brian David Robertson Foundation (BDR Foundation) to help with the school’s 10% share of the cost.
The solar panels are tied to a 4 Enphase micro inverters and the Enlighten Data system and the amount of electricity generated by this system of PV Solar Panels + Inverters can be seen at the <a href=”http://www.illinoissolarschools.org/solar-schools/darien/eisenhower-junior-high.php”>IllinoisSolarSchools.org</a> web site.
The panels are clearly visible to the students and to parents and the entire neighborhood as they were installed awning style on a south-facing wall near one of the entrances to the school.
PIX HERE
There are 571 students at Eisenhower.

On Cass Avenue in Darien, Illinois  (just off I-55) there is a new solar school installation at Eisenhower Junior High School.  Robert (Bob) Carlo is the primary contact.  Illinois Clean Energy Community Foundation funded the solar school installation with a 90% grant that covered 90% of the total cost of the project.  ReneSola donated 4 of their 250 watt PV panels through the Brian David Robertson Foundation (BDR Foundation) to help with the school’s 10% share of the cost.

The solar panels are tied to a 4 Enphase micro inverters and the Enlighten Data system and the amount of electricity generated by this system of PV Solar Panels + Inverters can be seen at the <a href=”http://www.illinoissolarschools.org/solar-schools/darien/eisenhower-junior-high.php”>IllinoisSolarSchools.org</a> web site.

The panels are clearly visible to the students and to parents and the entire neighborhood as they were installed awning style on a south-facing wall near one of the entrances to the school.

Eisenhower School

There are 571 students at Eisenhower.

Illinois Solar School at Mary Gage Peterson Elementary School

September 26th, 2014
On North Christiana Avenue in Chicago, Illinois, there is a new solar school installation at <a href=”http://www.illinoissolarschools.org/solar-schools/chicago/mary-gage-peterson-elementary.php”>Mary Gage Peterson Elementary School</a>. Ms Karla Holcomb is the primary contact.  Illinois Clean Energy Community Foundation funded the solar school installation with a 90% grant that covered 90% of the total cost of the project. Canadian Solar donated 4 of their 250 watt PV panels through the Brian David Robertson Foundation (BDR Foundation) to help with the school’s 10% share of the cost.
The solar panels are tied to a 4 Enphase micro inverters and the Enlighten Data system and the amount of electricity generated by this system of PV Solar Panels + Inverters can be seen at <a href=”http://www.illinoissolarschools.org/solar-schools/chicago/mary-gage-peterson-elementary.php”>Mary Gage Peterson Elementary School</a>.
The panels are clearly visible to the students as they are installed on a green roof of the school right outside classroom windows.
PIX HERE
There are 845 students at Peterson.

On North Christiana Avenue in Chicago, Illinois, there is a new solar school installation at <a href=”http://www.illinoissolarschools.org/solar-schools/chicago/mary-gage-peterson-elementary.php”>Mary Gage Peterson Elementary School</a>. Ms Karla Holcomb is the primary contact.  Illinois Clean Energy Community Foundation funded the solar school installation with a 90% grant that covered 90% of the total cost of the project. Canadian Solar donated 4 of their 250 watt PV panels through the Brian David Robertson Foundation (BDR Foundation) to help with the school’s 10% share of the cost.

The solar panels are tied to a 4 Enphase micro inverters and the Enlighten Data system and the amount of electricity generated by this system of PV Solar Panels + Inverters can be seen at <a href=”http://www.illinoissolarschools.org/solar-schools/chicago/mary-gage-peterson-elementary.php”>Mary Gage Peterson Elementary School</a>.

The panels are clearly visible to the students as they are installed on a green roof of the school right outside classroom windows.

Illinois Solar School at Mary Gage Peterson Elementary School

There are 845 students at Peterson.