Tech Help

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  1. Do installations with transformerless inverters require combiner boxes with OCPD?

    Asked 02/22/2013

    Hello, To my knowledge in installations with only 1 or 2 series strings a combiner box is generally unnecessary as the strings ca

    Question – 1 comment

  2. How can you connect two similar inverters to a single phase panel?

    Asked 01/07/2013

    Question – 2 comments

  3. Splicing Enphase string cable

    Asked 11/12/2012

    I need to modify an Enphase micro inverter string cable.

    Question – 5 comments

  4. Is it acceptable for solar panels to extend beyond the ridge of a sloped roof?

    Asked 10/31/2012

    Question – 2 comments

  5. How many panels can you monitor with a single Enphase Envoy IEMU-03?

    Asked 10/22/2012

    I am working on a 50 kW solar project where I want to use Enphase micro-inverters.

    Question – 1 comment

  6. How do I adjust for voids on a roof?

    Asked 09/18/2012

    I have an older structure that has a roof where the truss based roof is not completely flat in areas.  I haven't taken any measuremen

    Question – 1 comment

  7. How do I install and flash a standoff on a asphalt roof?

    Asked 09/17/2012

    Hi All, I'm using standoffs to fasten a Ironridge rail system to a asphalt roof (3 tab) But not being a prof.

    Question – 2 comments

  8. New to solar installation, need guidance with component selection

    Asked 09/12/2012

    So I have a collection of panels, inverters, racking and wiring to rack jboxes. After that then what?

    Question – 2 comments

  9. How do I connect a Fronius inverter to the web for monitoring?

    Asked 09/12/2012

    I would like to connect a Fronius IG Plus 7.5 to the web for monitoring. There seem to be many different networking options offered.

    Question – 1 comment

  10. For an existing grid-tied PV system, does Civic Solar have a retrofit for standby operation when the grid goes down?

    Asked 09/11/2012

    Most grid-tied systems are for net metering.  But when the grid is down, there is no power reference, and the inverters don't work. 

    Question – 2 comments

  11. One of my UniSolar PVL-68 panels is coming loose from the roof. What adhesive can I use to reattach?

    Asked 09/04/2012

    One of my UniSolar PVL-68 panels is coming loose from the roof. What adhesive can I use to reattach them? Thanks, Tobey

    Question – 1 comment

  12. Installation manual for SR 8

    Asked 09/01/2012

    Where can I download the manual for the SR 8 controller?

    Question – 1 comment

  13. How do I calculate Vtoc/Vtmp for a string sizing using the Outback charge controller tool?

    Asked 08/21/2012

    Question – 1 comment

  14. What are your options for backfeeding an electrical system that is fed with 3 phase 120/240volt containing a 240 volt hi leg on?

    Asked 08/13/2012

    The panel we will have to back feed off of the inverter has a 240 volt hi leg on the B phase.

    Question – 1 comment

  15. I am currently using 2 Trace SW4024 to produce 240 AC. Two of my neighbors have been hit by lightning, destroying one or both

    Asked 08/06/2012

    I am using 2 Trace 4024 units to produce 240 vac for my home.  Two of my neighbors have been hit by lightning, destroying their units.

    Question – 1 comment

  16. Can you wire an Enphase M210 240VAC at 208VAC?

    Asked 07/24/2012

    Word on the street is that Enphase is discontinuing the 208VAC version of the M210.  This puts a major hiccup in our project pipeline.

    Question – 1 comment

  17. How do you tie 6 panels in a series?

    Asked 07/23/2012

    How do I tie 6 Schott 225 watt panels together?

    Question – 1 comment

  18. How do you parallel the MS4024?

    Asked 07/19/2012

    I'm looking to parallel two Magnum MS4024s, and I'm curious if you need a special cable to do so.  Any suggestions?

    Question – 1 comment

  19. Low RFI MPPT

    Asked 07/18/2012

    I'm looking for a MPPT controller that could work with NiFe battery bank, 12V nominal, but wants to see about 15V finishing chgMax PV

    Question – 1 comment

  20. What is the difference between PV wire and USE-2 solar wire?

    Asked 07/18/2012

    I am thinking about using one of the new transformerless inverters, either the Astronergy / Chint Power inverters or the KACO New Energy i

    Question – 1 comment

  21. What is the best way to waterproof penetrations of a metal roof?

    Asked 07/18/2012

    We're working on a project with a standing seam roof, but we're concerned that the roof panels' attachment to the roof itse

    Question – 1 comment

  22. Uni-Solar Laminate on 8-inch Standing Seam roof?

    Asked 07/16/2012

    I have a large, south facing garage roof that faces south, just begging to be covered with PV laminate.

    Question – 1 comment

  23. Is the MECA Solar MS-2 tracker ARRA compliant?

    Asked 07/13/2012

    Question – 1 comment

  24. Morningstar TriStar TS-MPPT-45 45A Charge Controller power output problem

    Asked 07/13/2012

    Morningstar TriStar TS-MPPT-45 45A Charge Controller has power going in but no power coming out, could you help me identify the problem?

    Question – 2 comments

  25. Would the 8G27 Deka gell cell work on golf cart app for 48 v system?

    Asked 07/11/2012

    Looking to replace the batteries on my golf cart, I have a 48v system. Would like to stay away from the liquid acid.

    Question – 1 comment