1. Welcome Hearth.com Guests and Visitors - Please enjoy our forums!
    Hearth.com GOLD Sponsors who help bring the site content to you:
    Hearthstone Soapstone and Cast-Iron stoves( Wood, Gas or Pellet Stoves and Inserts)
    Caluwe - Passion for Fire and Water ( Pellet and Wood Hydronic and Space Heating)

feb 18... perfect day for solar up here in new England

Post in 'The Green Room' started by georgepds, Feb 20, 2013.

  1. georgepds

    georgepds New Member

    Joined:
    Nov 25, 2012
    Messages:
    99
    Monday was an almost perfect day for solar in New England. I've got ten 250 watt panels on my roof, each connected to an enphase M215 grid tied inverter. Because the inverter clips at ~213 watts, the peak output is 2130 watts, which I saw at around 11 am . Energy was 13.6 kwh for the day( from a 2.5 kw system) or 5.45 equivalent full sun hours. Five and a half hours of full sun in February from a roof pitched at 20 degrees to the horizontal is pretty good.

    I attach some of the pics from the the Enphase online tool to track production (total and of individual panels). power.jpg peak power.jpg .

    Helpful Sponsor Ads!





  2. Vic99

    Vic99 Minister of Fire

    Joined:
    Dec 13, 2006
    Messages:
    839
    Loc:
    MA, Suburb of Lowell
    Good stuff. I also use the enphase microinverters, however mine seem to clip at 225W, with a single instant of one hitting 226W. I have 25 suniva 255W panels. The system has been running since late Oct and my best day so far was Feb 16th.

    I live in a pop ~30k town near the MA/NH boarder. According to their website map, in October, three homes had enphase systems. Today I saw nine listed. Solar growth really seems to have dramatically increased around here. These cold morning temps dramatically boost efficiency.
  3. georgepds

    georgepds New Member

    Joined:
    Nov 25, 2012
    Messages:
    99
    Thats odd, I got next to nothing on the 16 and 17 due to snow and ice.. here are my results for the days around the 15. You must clean your roof fairly well
    date Kwh
    13-Feb 10.3
    14-Feb 12.0
    15-Feb 11.7
    16-Feb 3.6
    17-Feb 2.3
    18-Feb 13.6

    I've had a 1.2 kW system for about 13 years, Last fall I added another 2.5 kw iwth the enphase inverter
  4. nate379

    nate379 Guest

    Snow on mine. Doesn't melt that much when it's cold. I clean it with a roof rake, but it doesn't get it all.


    M215s clip at 225w
  5. Vic99

    Vic99 Minister of Fire

    Joined:
    Dec 13, 2006
    Messages:
    839
    Loc:
    MA, Suburb of Lowell
    I made an error. Most productive day was Feb 18th (26.5 kWh) not 16th (6.6kWh).

    I don't clean the roof at all. Panels on two different pitches (28 & 56 degrees). Snow melts real well off both, but better off of 56 pitch.

Share This Page