diy solar

diy solar

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  • Post in thread: New NEC code makes it impossible for DIY systems to be compliant

    @ArthurEld, can I ask which batteries you decided to purchase?
  • Post in thread: Eve 280ah cells, fell off ship

    @Hedges, this conversation has certainly taken a dark turn. I wasn't aware of the disaster in your post. It does make sense that the re-purposing of old ships would cause problems. I watched an interview of Boris Prokoshev, who was the captain of the cargo ship that brought the ill fated...
  • Post in thread: Panel comparison

    I think DThames probably answered the question you were asking, but I wanted to add some other ways to look at panel efficiency. People are usually trying to get either the most watts per dollar spent or the most watts per square foot (if they have limited space). Also, the output of the panels...
  • Post in thread: Hurricane Ian in Cape Coral Florida

    What I was remembering was this picture from an article on Vox after hurricane Maria hit Puerto Rico in 2017. Hurricane Maria was a true category 5 and this solar farm was on the east side of Puerto Rico and took the full force of the hurricane as it came ashore. However, this result...
  • Post in thread: Why doesn't engine oil ignite?

    It does burn. https://www.jalopyjournal.com/forum/threads/tech-week-build-your-own-waste-oil-burning-garage-heater.678222/ It doesn't burn in your engine because the surfaces that are in contact with the oil are kept below its vaporization temperature by the cooling system for the engine. The...
  • Post in thread: Xuba Electronics: DEAL - 280AH LiFePo4 cells. Purchase & Review

    Maybe I should get clarification on this too. The EVE 280ah spec sheet says: anti-torsion means 'to resist twisting' This doesn't appear to be a bolt tightening spec to me. It appears to be a maximum twist load that the terminals can withstand without twisting in the battery case. In other...
  • Post in thread: I have fried 2 charge controllers! Please help!!

    I always suggest fusing both the positive and negative wire going to the panels, which would require 10 fuses. Negative is not necessarily ground, and some charge controllers do not allow you to bond the negative from the panels to chassis ground anyway. Fusing both conductors from the...
  • Post in thread: Solar math makes my head hurt

    I'm in total agreement here. Solar panels are not the expensive part of a PV system anymore. When deciding on panels, don't forget to include the complications and expense of mounting them. A lot of low output panels may not be a better deal than a few high efficiency panels once you include...
  • Post in thread: Another beginners question

    If I understand correctly, you have a battery that is only 48 amp hours. You didn't say the chemistry, but I doubt it is lithium titanate, which is the only chemistry I know of that can sustain really high C rates during discharge. So If your battery is lithium iron phosphate, and can handle a...
  • Post in thread: Solar math makes my head hurt

    From the data sheet: The PT-100 is a Maximum Power Point Tracker (MPPT) charge controller ELECTRICAL SPECIFICATIONS Maximum PV input voltage (any condition) 200 VDC + battery voltage or 240 VDC - whichever is lower Maximum PV operating voltage 187 VDC Maximum PV array short circuit current 100...
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