March 2004 – Citizens petition Board Of Selectmen for Clean Energy. The Board unanimously passes a resolution endorsing research into the 20% by 2010 Clean Energy Campaign.
November 2004 – BOS becomes the 2nd town (New Haven was the first) to committing Portland to the 20% by 2010 Clean Energy Campaign, unanimously passing the resolution.
March 2005 – Portland Clean Energy Task Force formed.
April 2005 – The DPUC approved CT Clean Energy Options program lets any ratepayer support clean energy systems to account for the electricity they use.
September 2005 – Portland becomes the 1st municipality buy clean energy through CT Clean Energy Options when the BOS unanimously votes to contract with Sterling Planet, a clean energy supplier.
November 2005 – Portland Clean Energy Task Force presents to the Portland Board of Education the idea for a 100 Kilowatt solar array for a school building. Using a power purchase agreement, there would be no costs to Portland, and the town would buy electicity from the array at a reduced rate, saving money whilereducing harmful emissions.
May 2006 – With it's 87th sign up, Portland achieves a 2.5% per capita CT Clean Energy Options program sign up rate. This will earn the town a free 1 Kilowatt solar photovoltaic panel as soon as Portland becomes a Clean Energy Community.
June 2006 – 126 Portland residents and businesses enroll (resulting in 110 points) with the CT Clean Energy Options program. By getting 100 points worth of sign ups, Portland achieves the status as a “Clean Energy Community” and thus earns a free solar photovoltaic panel. The free panel comes as an incentive from the CT Clean Energy Fund.
Also, the Portland Clean Energy Task Force receives from the CT Clean Energy Fund $5000 to disseminate as ‘Community Innovations’ grants to local groups to promote clean energy activities and enrollments in the CT Clean Energy Options program.
August 2006 - Portland Boy Scout Troop 2 receives first Community Innovations grant and staffs clean energy tables at the Browstone Quarry Festival in September and the Portland Fair in October.
October 2006 – Portland Clean Energy Task Force releases “The Case For Clean Energy” a 15 minute video detailing how clean energy has the potential to address essentially all the challenges facing our current fossil fuel and nuclear based energy system.
October 2006 – Dozens more clean energy sign ups place Portland just over 4% per capita enrolled in the CT Clean Energy Options
November 2006 – Solar Consultant advises town on possible sites for solar array.
November 2006 – Official tally of Portland’s CT Clean Energy Option enrollees reaches 169, giving the town 142.5 points and a 4.79% per capita sign up rate.
December 2006 – Official tally of Portland’s CT Clean Energy Options enrollees reaches 212, giving the town 184.5 points and a 6% per capita sign up rate. Passing the 5% mark earns Portland another array, and reaching the 5% mark first (along with Bethany, CT) earns Portland a 2 Kilowatt bonus.
February 2007 – CCEF approved solar installers visit Valley View to prepare estimates for a 5 Kilowatt solar array.
April 2007 – Portland Clean Energy Task Force hosts free showing of “An Inconvenient Truth” with over 60 in attendance. Colin Bennett of Clean Water Action speaks afterward.
June 2007 – Portland Clean Energy Task Force hosts four CCEF approved installers (Akeena Solar, Solar Wrights, Solar Works, and PVSquared). Over 80 in attendance.
August 2007 – Portland Clean Energy Sign Up points climb to 201, qualifying the town for an additional 1 kilowatt of solar panels.
September 2007 – Portland Clean Energy Task Force at the Brownstone Quarry Festival host a Hybrid car show-and-tell.
September 2007 – Portland Clean Energy Task Force at the Portland Fair with CT approved solar photovoltaic (PV) installer Solar Wrights.
October 2007 – Bauer/Schnurman house uses CT Clean Energy Fund 50% rebate to install solar photovoltaic (PV) array.
November 2007 – Portland BOS unanimously approves first of it's kind 'hybrid' photovoltaic installation for Valley View School.  Using the free five kilowatts (Kw) of PV earned through the Clean Energy Communities program, the town elects to take advantage the CT Clean Energy Fund 50% PV Rebate program to install another 5 Kw of PV.  The $83,000 total value of the system requires an outlay of just $14,000, with an estimated payback period of 5.5 years.
December 2007 – Portland Clean Energy Task Force hosts geothermal installer Siverio Mechanical at Portland Library.
December 2007 – Rooney house uses CT Clean Energy Fund 50% rebate to install solar (PV) array.
January 2008 – Portland's clean energy sign ups pass 240 for a 7% per capita sign up rate.
May 2008– Precision Plastics uses CT Clean Energy Fund 50% rebate to install solar (PV) array.
June 2008 – Portland Clean Energy Task Force hosts two CCEF approved installers (GroSolar, Sunlight Solar). Over 80 in attendance.
July 2008 - Portland Clean Energy Task Force recommends taking the EPA Energy Efficiency Challenge which the Board of Selectmen unanimously approve.
August 2008– AltPower (a CT CEF approved installer) begins installation of PV array on Valley View school.
September 2008 – Portland Clean Energy Task Force at the Brownstone Quarry Festival unveils CT Solar Lease program that gets residents a PV system on their house for no increase in electricity bills (lease payments are subtracted from utility bill).
October 2008 – Bransfield house uses CT Clean Energy Fund 50% rebate to install solar (PV) array.
November 2008 – Valley View recieves final OK from CL&P and starts to provide energy to the school.  At maximun output, the array will power 50 computers.
March 2009 - Portland Clean Energy Task Force presents Energy Plan to Board of Selectmen who unanimously approve it.
June 2009 - Portland reaches 276 enrollments for the CT Clean Energy Options (a 7.6% sign up rate)
August 2009 - Portland begins 'benchmarking' energy use for town facilities in order to prioritize energy projects.
September 2009 - Portland is one of three finalists for an Energy Conservation award from the Hartford Business Journal.
September 2009 - With help from Clean Water Action and CL&P, Portland Clean Energy Task Force starts promoting Home Energy Solutions to residents. Any town residents who enroll are entered into a drawing for an Energy Star laptop computer (good till 12/31/2009). Two HES contractors, Lantern Energy and New England Conservation Services, offer to rebate back to the town's Energy Efficiency Programs account $25 for each HES done. The account will be used to fund energy efficiency measures for the community and town facilities.
October 2009 - Pear house installs solar PV array.
October 2009 - Portland Clean Energy Task Force unanimously recommends entering into an agreement with Connecticut Conference of Municipalities to perform initial energy assessments of all town facilities at no cost to the town. Board of Selectman unanimously adopts the resolution.
November 2009 - Portland Clean Energy Task Force unanimously approves joining with the Community Energy Saving Project, a 15 town pilot program that seeks to use ARRA funds for energy efficiency. With the possibility of receiving assistance for a residential energy efficiency that includes an online tracking software, an energy efficiency revolving loan fund, and various other support mechanisms for activities the Task Force promotes anyway, the Task Force wholeheartedly endorses Portland’s participation in this project to the Board of Selectmen.
December 2009 - Over 70 town residents have an HES done on their homes, reducing emissions and saving money. Portland Clean Energy Task Force extends promotion to Earth Day, April 22, 2010.
January 2010 - Portland Clean Energy Task Force collaborates with Lantern Energy, New England Conservation Services, and CL&P to offer a coupon good for $50 off the $75 HES fee.
February 2010 - Portland Clean Energy Task Force partners with Sideliners, Portland School PTO's, and Portland Garden Club to help spread the word about the HES. In return, the Task Force will split the $25 bonus with them.
February 2010 - Lantern Energy and New England Consevation Services present mid-term checks totaling $1,825 to Portland's Energy Efficiency Programs account.