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diy solar

Recent content by charlesrg

  1. charlesrg

    Mismatch Series / Parallel in 5 Panel Configuration

    I'm planning to get the MC4 20Amp fuses connected to the panels, then connect that to a 8AWG MC4 cable and combine it all to a 4AWG cable, might need to use a busbar or weld it all together.
  2. charlesrg

    Mismatch Series / Parallel in 5 Panel Configuration

    That is a good idea, however Victron calculator does not recommend using the 250V/85 as all panels series voltage will get very close to it. I would have to get a charge controller from down under I think Outlaw solar has a 300V MPPT. I'm trying to avoid having two charge controllers to reduce...
  3. charlesrg

    Mismatch Series / Parallel in 5 Panel Configuration

    It will be lots of current, but why do you feel a fuse will be necessary ? My plan was to use a 60-70Amp fuse for the entire installation.
  4. charlesrg

    Mismatch Series / Parallel in 5 Panel Configuration

    I meant to say to get another MPPT charger and wire to the 5th panel.
  5. charlesrg

    Mismatch Series / Parallel in 5 Panel Configuration

    A combiner box in the roof will be hard. I think will just convert the MC4 to heavy 4AWG wire.
  6. charlesrg

    Mismatch Series / Parallel in 5 Panel Configuration

    Will be using 4AWG wire, have about 12 feet for the longest run.
  7. charlesrg

    Mismatch Series / Parallel in 5 Panel Configuration

    After some research I found that using all the panels in Parallel will be supported and that should lead to best performance. This also helped: https://footprinthero.com/solar-panel-series-and-parallel-calculator
  8. charlesrg

    Mismatch Series / Parallel in 5 Panel Configuration

    I've limited roof space and wanted to use the most out of the panels with less components a possible. I have a total of 5 Panels LG440QAC-A6 and a Victron MPPT 150-85 Looking to have a series with the first 3 Panels in Parallel connected to 2 panels in parallel, behind the MPPT charge...
  9. charlesrg

    Inverter Disconnect with Pre-Charge

    Thought it was your idea, you just reposted what should be a link for a resource. FilterGuy is the one that deservers the credit.
  10. charlesrg

    Inverter Disconnect with Pre-Charge

    Great manual. Really appreciate you sharing it. Your idea of rotary switch is the best. Pre-Charge will be always placed if the user follows an error indicating the power on order. Great work
  11. charlesrg

    MG Chemicals 847 Test

    @zolee the 8463A lists as Grease and the 847 as assembly paste. I don't think it's best practices to put grease directly onto the terminal as it can come undone with vibration. I guess if you're careful to avoid the threads it can work. I just ordered some 847 from laddresearch as they are...
  12. charlesrg

    IQ7+ & 390W Panels

    It seems that a "line side tap" would be the solution to resolve this. I don't see disadvantages on this when not using a battery system.
  13. charlesrg

    IQ7+ & 390W Panels

    I'm trying to get pricing on them but haven't found online sales. Do you know if they support an API/REST to get the system status even without their cloud ? Do you pay extra for 25 year warranty ? On their docs they state 10 year default and 25 year option.
  14. charlesrg

    IQ7+ & 390W Panels

    I want to start with a big thanks to @svetz , @Hedges , @Solar Guppy , @ncsolarelectric , really appreciate you guys helping me here. It took me a while to reply as I was digesting all the good info you guys shared. I'm going to share the info I find here so it can be used for others in the...
  15. charlesrg

    IQ7+ & 390W Panels

    @svetz thank you very much for sharing your solar install info. I'm also in Florida, about 100 miles from you in Fort Lauderdale (Broward County). I've New Canadian Solar 390W panels from a surplus dealer that will cost me $0.66 per watt. I'm looking to order a palett with 30 panels it will...
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