Announcement

Collapse
No announcement yet.

Solar Panel Test-gctid814598

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Solar Panel Test-gctid814598

    We are going to be on the hook for the next 11 days. The weather is forecast sunny, looks like this could be the best week of the current summer. I'm going to see how many days I can go without using the generator. The Admiral will use the microwave ad electric kettle every morning. The ice machine and stereo will be running all day and evening long and the fridge will be running 24/7.

    3 flexible 100 watt panels on the front of the fly bridge.
    1988 3218
    Triple “O"
    Hino diesels

    Seadoo Wake 170

    #2
    11 days Joe, where abouts?

    Should be a good test for the system. Keep us informed.
    Sea Venture
    2000 3055, 5.7/B2, 18x23" props
    Cruising the PNW and beyond.
    DIYC, Riverhouse Marina
    MMSI 316029971

    Kirk
    Drinks well with others.

    Comment


      #3
      With 300 Watts, I fear you are going to be disappointed.
      Midnight Star
      1996 3587
      Twin diesels, Hino 250's
      Ladysmith, BC
      History: 1996 - 2655, 2001 - 2855, 1984 - 3270

      Comment


        #4
        "SprinterX" post=814611 wrote:
        11 days Joe, where abouts?

        Should be a good test for the system. Keep us informed.
        We are at Bedwell Harbour. We'll do day trips from here on the Waverunner.

        If any BOC members are around, stop by and say hello.
        1988 3218
        Triple “O"
        Hino diesels

        Seadoo Wake 170

        Comment


          #5
          "freedre" post=814636 wrote:
          With 300 Watts, I fear you are going to be disappointed.
          I know we can do a weekend.
          1988 3218
          Triple “O"
          Hino diesels

          Seadoo Wake 170

          Comment


            #6
            Joe - did you install a battery monitor that calculates State of Charge (SOC)?
            Terry
            1999 Bayliner 3388
            Twin Cummins 4BTA
            Fisherman, Cruiser, Boaticus-enthusiasticus-maximus
            Member Royal Victoria Yacht Club

            Comment


              #7
              300 watts = 25 amps (at best on a perfect day)

              Based on 6 hours of full production= 150 amps per day (sugar coated).

              The fridge might be around 50-60 amps per day depending on a number of factors.

              Depending on the ice maker, that could use a fair bit of juice.

              The electric kettle and microwave use a pretty big draw but at least this will be early in the day perhaps give a good chance to recover the amps through the day.

              If you run the generator during the use of the kettle and/or microwave usage that would help.

              How many amp hours is your total house battery bank? Battery configuration?

              Please reply back to this post after your trip with your experience and observations. It is always interesting to know the real-world characteristics compared to the specs.

              Have a safe trip!
              1995 Bayliner 3587
              Twin Hino 250HP
              Located In Sidney BC, Canada

              Comment


                #8
                Don't count on 6 hrs of full production a day. At best, you will get a maximum of 2 - 3 hours unless you constantly tilt the panels towards the moving sun.
                Greg A.
                1994 4788
                "Simplicity"
                2002 Capri 175
                "Little GFI"
                Boat on the Sac/San Joaquin Delta

                Comment


                  #9
                  You should go to Ganges for the long weekend . The fireworks are great
                  John McLellan White Rock BC
                  "Halifax Jack"
                  1999 2855 383 stroker BII
                  MMSI 316004337

                  Comment


                    #10
                    "tower3218" post=814656 wrote:
                    Don't count on 6 hrs of full production a day. At best, you will get a maximum of 2 - 3 hours unless you constantly tilt the panels towards the moving sun.
                    Just go to the government PWatts site and enter the numbers for your PV solar panels. It takes into account latitude (angle of the sun, length of day) and typical weather conditions for the area. The site doesn't deal well with less than 1 kW of panels, so just enter the number of Watts instead of kW (e.g. enter 300 Watts as 300 kW), and divide the production amounts by 1000.

                    http://pvwatts.nrel.gov/

                    Enter 0 degrees for the tilt. Since you're interested in DC production, under advanced parameters enter 1.0 for DC to AC size ratio, 99.5% for inverter efficiency (highest you can set it), and 0 for ground coverage ratio (to reflect the panels being horizontal).

                    Entering 300 Watts for Blaine, WA (closest point in U.S. to British Columbia) yields a peak production of 46.2 kWh for July, which at 31 days works out to 1.49 kWh produced per day. That's 1490 Wh / (300 Watts * 24 h) = 0.207 capacity factor for July, which is slightly better than the annual average for the desert Southwest U.S. Or put another way, that's equivalent to 24h * 0.207 = 4.97 hours of peak production per day (zero production the other 19.03 hours).

                    Year-round production will be 300.8 kWh, which translates into a capacity factor of 0.114, which is about what you'd expect at that latitude. Equivalent to 2.7 hours of peak production (0.824 kWh) per day.

                    Somewhat disheartening, at an electricity price of 7 cents/kWh, your panels only generate $20 worth of electricity per year. Or an annual average production of 5.6 cents worth of electricity per day.
                    1994 2556, 350 MAG MPI Horizon, Bravo 2

                    Comment


                      #11
                      "hfxjack" post=814720 wrote:
                      You should go to Ganges for the long weekend . The fireworks are great
                      That's what I told him too.
                      Sea Venture
                      2000 3055, 5.7/B2, 18x23" props
                      Cruising the PNW and beyond.
                      DIYC, Riverhouse Marina
                      MMSI 316029971

                      Kirk
                      Drinks well with others.

                      Comment


                        #12
                        "SprinterX" post=814731 wrote:
                        "hfxjack" post=814720 wrote:
                        You should go to Ganges for the long weekend . The fireworks are great
                        That's what I told him too.
                        Not sure. Admiral has her own ideas. lol
                        1988 3218
                        Triple “O"
                        Hino diesels

                        Seadoo Wake 170

                        Comment


                          #13
                          Things ant going as expected. Lots of wind today. My solar panels were facing the wrong direction most of the day. Still running on batteries. 12.8 volts reading on my solar controller as I go to bed.
                          1988 3218
                          Triple “O"
                          Hino diesels

                          Seadoo Wake 170

                          Comment


                            #14
                            "Solandri" post=814728 wrote:


                            Somewhat disheartening, at an electricity price of 7 cents/kWh, your panels only generate $20 worth of electricity per year. Or an annual average production of 5.6 cents worth of electricity per day.
                            The problem with this analogy is that we are talking about boats - not homes. The cost of power on your boat is considerably higher than 7 cents/kWh. The solar panels are are a substitute for on board generators, not commercial power.

                            When viewed from this perspective, solar panels are much more attractive.
                            Midnight Star
                            1996 3587
                            Twin diesels, Hino 250's
                            Ladysmith, BC
                            History: 1996 - 2655, 2001 - 2855, 1984 - 3270

                            Comment


                              #15
                              "freedre" post=814741 wrote:
                              "Solandri" post=814728 wrote:
                              Somewhat disheartening, at an electricity price of 7 cents/kWh, your panels only generate $20 worth of electricity per year. Or an annual average production of 5.6 cents worth of electricity per day.
                              The problem with this analogy is that we are talking about boats - not homes. The cost of power on your boat is considerably higher than 7 cents/kWh. The solar panels are are a substitute for on board generators, not commercial power.

                              When viewed from this perspective, solar panels are much more attractive.
                              True that. I was thinking more in terms of value of electricity produced. Back in my grad school days, our EE crunched some numbers and calculated we were spending $20,000 on batteries to carry around 13 cents worth of electricity in our robot submarine.

                              Anyhow, the Honda EU2000i is rated at 1600W and 3.4 hours from 0.95 gallons at that output. At $3/gal for gas, that's ($3/gal * 0.95 gallons) / (1.6 kW * 3.4 hours) = 52.4 cents/kWh.

                              At 1/4 load (400 Watts), it gets 8.1 hours. So that works out to ($3/gal * 0.95 gallons) / (0.4 kW * 8.1 hours) = 88.0 cents/kWh.
                              1994 2556, 350 MAG MPI Horizon, Bravo 2

                              Comment

                              Working...
                              X