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LG 280 Watt and Enphase M215 make a great combination

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  • #31
    re: m215s best i've seen is $115.

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    • #32
      That is probably a function of positive power tolerance a clear cool day and the TL's are extremely efficient
      NABCEP certified Technical Sales Professional

      [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

      [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

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      • #33
        Hey dirtysanchez, I know you have got to be excited. Congratulations on you new system!

        With the LG 280 watt and the M215 micro's, I have seen clipping only on a couple days. And that is really no big deal since it is so minor. But I would tell someone to check PVWatts before considering using higher watt panels. In my area, and at my azimuth, the 280 watts panels are about as high as you would want to go.

        I believe with the LG panels, you could go higher on the derate factor. As I have mentioned, my system continuously shows to be 110 percent or higher than rated output. I bumped my derate factor up .89 in Enlighten, and that got me close to 100 percent. But I have since lowered it to .83.

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        • #34
          Originally posted by dirtysanchez
          Lots of clouds but I turned it on while everything was clear above.
          Cloud edge effect?
          [SIGPIC][/SIGPIC]

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          • #35
            Originally posted by russ View Post
            Cloud edge effect?
            I guess that could be it in my case . It stayed on like that for couple of minutes but once clouds rolled in, it went down to about half of that. When I questioned my installer he sent me a picture of the inverter from his previous install, dual 4000TL's showing 4000W with only 3200 DC watts worth of modules each. This is 25% over his rated dc power with Suniva modules. I got a picture I can post but need to get ok from him first. I do understand now why he likes to oversize his inverters.

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            • #36
              I would seriously question 25% over without knowing all the conditions that were present when it occurred.
              And the output meters on inverters are not revenue grade by a long shot .
              NABCEP certified Technical Sales Professional

              [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

              [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

              [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

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              • #37
                Originally posted by Naptown View Post
                I would seriously question 25% over without knowing all the conditions that were present when it occurred.
                And the output meters on inverters are not revenue grade by a long shot .
                25% is way too high, I'm thinking something could be misscalculated by his inverter. I will get in touch with the owner since I see his email in the chain that was sent to me and hopefully get more details. I'm very intrigued.

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                • #38
                  Since this thread has gone into both forms of inverters I thought I'd ask this question, Has anyone ever put an identical array(panels) with Enphase micros next to an array with a single inverter. Such as the 280w LG panels. If no shade were present other than bypassing clouds which would out perform the other? T says he hasn't seen much clipping with his system which would be under producing nameplate ratings on the panels even if they all were clipping at the same time. But with a central inverter I have seen many people say they over produce on nameplate rating. So is the true and only advantage to Enphase for a tree/roof shaded array only or can it actually out produce a central inverter during the course of a day? I can't believe Enphase wouldn't try such a test(unless they have and they produced less) as a marketing tool to get even unshaded array business. Thanks in advance to anyone that answers that question. If it's already been discussed somewhere I apologize!

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                  • #39
                    I believe enphase would win with their 96 percent efficiency. But there are more reasons to go with micro inverters. You just can't beat the monitoring ability. You can see the system as a whole, or drill down to see what each panel/inverter pair are doing. And if you should have trouble down the road, the microinverter could save you days of troubleshooting.

                    Obviously I'm very happy with my micro inverter setup. But you can save a few bucks with a central inverter. My thinking was to spend a few more dollars, and have no regrets later on.

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                    • #40
                      Originally posted by dirtysanchez
                      This makes me think that installing anything larger than 225Watt ( assuming enphase clips at 225) module with enphase 215 is a waste of money ?

                      [ATTACH=CONFIG]3246[/ATTACH]
                      graph1.jpggraph2.jpg

                      If the prevailing conditions during the reading (represented by the top region of the bell curve) persisted all the time you'd be right.

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                      • #41
                        I think the biggest thing about the microinverters in a no shade problem location is the "I'll show you mine if you'll show me yours" factor.

                        Doesn't do anything other than cost more money it seems.
                        [SIGPIC][/SIGPIC]

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                        • #42
                          Originally posted by russ View Post
                          I think the biggest thing about the microinverters in a no shade problem location is the "I'll show you mine if you'll show me yours" factor.

                          Doesn't do anything other than cost more money it seems.
                          The biggest advantage is in trouble shooting. Micros will lead you to the exact problem and location.
                          I had an issue with a panel on a string inverter and had to take 1/2 the array apart to find it.
                          On a steep metal roof it was not fun and took up the better part of a day.
                          NABCEP certified Technical Sales Professional

                          [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

                          [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

                          [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

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                          • #43
                            Originally posted by Naptown View Post
                            The biggest advantage is in trouble shooting. Micros will lead you to the exact problem and location.
                            I had an issue with a panel on a string inverter and had to take 1/2 the array apart to find it.
                            On a steep metal roof it was not fun and took up the better part of a day.
                            How often do you get to service a location with a bad panel. Was this a mechanical failure ( critters ) ? or something was internally bad .

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                            • #44
                              Bad connection in the panel junction box in this case.
                              We had 6 in that shipment that were bad.
                              These were the last 16to go up and although the guys were told to test each panel individually they didn't and just put them up.
                              The others were tested before or ground mounted where it is easy to find the fault
                              NABCEP certified Technical Sales Professional

                              [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

                              [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

                              [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

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                              • #45
                                Originally posted by Naptown View Post
                                These were the last 16to go up and although the guys were told to test each panel individually they didn't and just put them up.
                                Trying to get home on time?
                                SunnyBoy 3000 US, 18 BP Solar 175B panels.

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