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  1. J

    Tiny solar battery project

    I have automatic chicken coop doors that run on 2 AA batteries, and I have been thinking about putting in some NIMH batteries and a tiny solar cell to keep them charged. I’ve already got some little 3v solar panels from another project. Since the stakes are so low, can I just put the solar cell...
  2. J

    Supplementing 220v AC?

    Now that we are at the hottest part of the year, the aircon runs constantly and it's more than my solar can handle. It can run us from sunrise until noonish but then the battery is drained and it has to go back to using the grid. So, I'm wondering if the possibility exists to use its output as...
  3. J

    Another Growatt inverter/charge controller question

    I have 18x 450w 48v panels on my roof. This growatt 12kw inverter of mine has 2 charge controllers. I am presently using them both with 9 panels on each one. Spec sheet on this says max PV charge current 120 amps. It has 2 charge controllers. Question: Does that mean the throughput on each...
  4. J

    Growatt 12kw + bigbattery kong help?

    I've got a Growatt 12kw inverter and a Big Battery Kong Elite. BB has its own internal BMS which does not communicate with anything else. My issue is this: When the battery is full, it simply goes into sleep mode and stops taking charge. Leading the inverter to freak out and say the battery...
  5. J

    Power source selection box?

    Is there an all-in-one solution for some kind of switch box that lets you select your breaker box input? This will be to choose whether my inverter's input comes from the grid, or from a generator.
  6. J

    Mounting panels to metal roof - bracket count and orientation question

    I've got this type (see attachment) roof going up and solar needs to go onto that. Due to measurements (8 inches between high ridges) the best layout I can think of is to mount the solar panels "vertically" or "portrait" orientation, but that also means that the brackets to hold them must be on...
  7. J

    Growatt with dual pv input question

    Do both pv inputs have to match in voltage, or wattage, or both? My reason for asking is that I have 20 panels, and wondering if I should group them as 5 groups of 4 (and have one pv input of 3 groups, one pv input of 2 groups), or 4 groups of 5 and have it split evenly.
  8. J

    adding 12v windmill to 48v solar system

    I have an old windmill (KISS) from my days being a boat hippy, and I'd like to use it in my solar setup. Because why not, free power. BUT it puts out +-12v AC current, turned into 12v DC by a rectifier, and the rest of my system is 48v. Can this still be used, maybe with one of those golf cart...
  9. J

    Will a 220v split phase inverter supply 110v house current and 220v ac unit?

    Trying to figure out what I need for a household backup/offgrid setup. Everything in the house runs on 110v standard US current but the AC unit is 220v single phase. I'm not super knowledgeable about the split phase stuff but I understand how two 110s can be combined into a 220. BUT... where...
  10. J

    Generic advice for household with heavy aircon use?

    Greetings. New to the forum. Not new to offgrid solar but new to the "new" generation of offgrid solar stuff. It has changed a lot since I used it for living on a boat. Anyways I am building a new house and since we are in central Florida we have both an abundance of sunshine and heat. I will...
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