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  1. MySuperDikeyDayJob

    Sizing a A/C for 120 SF to run 16 Hours off 690 Wh Solar-charged battery

    Snarky perhaps but it was a good joke and it did give me a big belly laugh. Plus i love the visual... me melting in the heat with toes frosty inside a freezer. Good one.
  2. MySuperDikeyDayJob

    Sizing a A/C for 120 SF to run 16 Hours off 690 Wh Solar-charged battery

    Thank you. Helpful. I know an inverter is beneficial but i am fuzzy on why. Need to pull out my old EE books and read up a bit more. Your point about startup amperage is a good reminder, i had forgotten about that phenomenon.
  3. MySuperDikeyDayJob

    Sizing a A/C for 120 SF to run 16 Hours off 690 Wh Solar-charged battery

    thanks, this is helpful. The roof has limited space but that's probably how I'll try to size the (max) solar array.
  4. MySuperDikeyDayJob

    Sizing a A/C for 120 SF to run 16 Hours off 690 Wh Solar-charged battery

    Thanks. Brand new walls so we are packing them with insulation. since the space is small, I'm looking at a mini-split wall mount.
  5. MySuperDikeyDayJob

    Sizing a A/C for 120 SF to run 16 Hours off 690 Wh Solar-charged battery

    Thank you. I've done the back-of-the-envelope needs, unfortunately that was after i bought the system (lol, duh!) but i will look at your reference. It's a small "guest house" and barely enough for 1 to crash for a couple of weeks. No big HVAC, kitchen, laundry, etc. Tomorrow I have scheduled a...
  6. MySuperDikeyDayJob

    Sizing a A/C for 120 SF to run 16 Hours off 690 Wh Solar-charged battery

    Thanks. I renovated a 120 year old house from foreclosure, did about half the work myself, so I can figure some stuff out. My (female) helper used to call it her Super-Dikey-Day-Job. I'm an engineer, albeit not electrical, but I'm open to learning and I can get past mistakes and failures. Glad...
  7. MySuperDikeyDayJob

    Sizing a A/C for 120 SF to run 16 Hours off 690 Wh Solar-charged battery

    Yeah i was wondering if a variable speed drive motor would help. Thanks for the confirmation and references.
  8. MySuperDikeyDayJob

    Sizing a A/C for 120 SF to run 16 Hours off 690 Wh Solar-charged battery

    I'm building an off-grid hut in the back yard, it's 8x10x12 high. I purchased a 4Patriots "1800" which has a max capacity of 768 DC Watt-hours or 690 AC Watt-hours from full battery to dry. But... I can't find a small enough window A/C or mini-split to run off battery overnight. Recharging the...

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