More Panels & Mini Split A/C

Discussion in 'Off Grid Living' started by BenP, Jun 19, 2018.


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  1. BenP

    BenP Monkey++ Site Supporter+

    It has been hot 90+ the past few days and my heat pump water heater is not keeping the house cool enough anymore. I painted the roof white and ordered a mini split heat pump A/C unit from eBay that should be here today. The A/C unit will draw about 665w when cooling and my solar setup would not support that additional load so last night I installed 750w worth of new panels on the roof. They were doing great this morning before I left for work, I really wanted to stick around till noon and see what they would do but I had to go. New Panels.
     
  2. oil pan 4

    oil pan 4 Monkey+++

    If you get an inverter split it can draw a lot less than name plate rated power.
     
    BenP, Asia-Off-Grid and hitchcock4 like this.
  3. T. Riley

    T. Riley Monkey+++ Site Supporter++

    Could you find a link to the a/c unit?
     
  4. BenP

    BenP Monkey++ Site Supporter+

  5. Cruisin Sloth

    Cruisin Sloth Special & Slow

    Panels are ?
    Inverter set voltage is ?
    AC unit is ?
    Links

    Or your asking the wrong tree .
    I do this for a ?
    Mine works fine times 3 units .

    Sloth
     
    Gator 45/70 likes this.
  6. Asia-Off-Grid

    Asia-Off-Grid RIP 11-8-2018

    Truer words...

    We installed a new Panasonic 1.5 Horsepower (~12,000 BTU) Split Inverter Compressor Air-Conditioner* (Model Number CS-PS12TKH) about a month ago, here at the farm. We also run two refrigerator / freezers. One ref combo is a Samsung Digital Inverter, while the other uses the "old style" compressor. During a power cut, a single Honda EU20i Inverter Generator, will power both inverter appliances AND all lights, fans, a water pump, my network, and my desktop computer, as well as all associated hardware that I need to run - simultaneously. The ONLY thing it strains to power up, is the "old style" compressor refrigerator / freezer. It's a horizontal refrigerator / freezer anyway. So, we just unplug it and keep the doors closed during power cuts. I'd say that is pretty danged good, for a single, small generator - that is also very quiet to run. I always run it on eco-mode.

    * Total installation price, solely for comparison: $465 USD, all in. $415 USD to buy the air-con and $50 USD for delivery and installation, at the farm.
     
    Last edited: Jun 20, 2018
    Witch Doctor 01, BenP and ghrit like this.
  7. BenP

    BenP Monkey++ Site Supporter+

    That is a great price and I would have gladly paid $50 to have someone install this thing. I got the outside unit bolted to the roof last night. If it does not rain I will hammer drill a couple holes through the roof tonight and bring the lines to the inside unit. I still need tor run conduit and pull wire to it. I am going to hook it up to a relay that will cut the power when my batteries fall below a certain level. Actually, I bough a small breaker box and I am going to make that whole box switch off when the batteries fall below a certain level, I will connect things to it that I consider luxury items.
     
    Asia-Off-Grid likes this.
  8. BenP

    BenP Monkey++ Site Supporter+

    I am not sure I understand what you are asking exactly but this is my current setup, I have more solar panels in the barn that I still need to install:
    2000w Solar Panels Installed (12v panels wired in pairs to make 24v)
    2 Schneider Electric Conext XW MPPT 60 Amp Solar Charge Controllers (one with 1400w, one with 700w)
    Schneider Electric Conext SW 4024 3,400 Watts, 24VDC Inverter 120/240 VAC
    Schneider Electric Conext XW+/SW System Control Panel (SCP)
    LiFePO4 Prismatic Battery 24V, 300Ah (24v=dead/27.4=full charge)
     
    Last edited: Jun 20, 2018
    Asia-Off-Grid likes this.
  9. Cruisin Sloth

    Cruisin Sloth Special & Slow

    I just installed the Mini split .
    ALL's well & working on solar with light sensors etc. Hiding roof will be next , But if I get overcast , Im back up on the main barn roof installing 350 watt in 3s 12P array.
    Sloth
     
    Last edited: Jun 22, 2018
  10. BenP

    BenP Monkey++ Site Supporter+

    I got everything hooked up to the unit on the roof last night, I will mount the unit inside the house tonight and with any luck get to try it out. This is a photo of the work in progress. AC Install.
     
    Asia-Off-Grid likes this.
  11. BenP

    BenP Monkey++ Site Supporter+

    I got it working last night but I could only run it for an hour or so because it was already dark. It did not pull much power, I am impressed. We ran it this morning for a couple hours and it brought the relative humidity down 10% and the temp down 2 degrees. I still need to babysit it because i don't have it setup to shut down when the power gets low, I might work on that tonight.
     
    Asia-Off-Grid likes this.
  12. Asia-Off-Grid

    Asia-Off-Grid RIP 11-8-2018

    Pretty efficient unit, Ben?
     
  13. Cruisin Sloth

    Cruisin Sloth Special & Slow

    OK , I'll clean my posts
    Sloth
     
  14. BenP

    BenP Monkey++ Site Supporter+

    Seem to be the case, occasionally it draws a lot of power for a short period of time, I need to investigate.
     
  15. Cruisin Sloth

    Cruisin Sloth Special & Slow

    Huge Power draw is from the compressor charging the accumulator up , then as it needs coolant to move the compressor runs at a slower rate . Or that's how my 3 Mini splits work
    Im on R410a

    Sloth
     
    BenP likes this.
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