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Off grid 5 ton
Last Post 27 Feb 2024 11:06 AM by
newbostonconst
. 6 Replies.
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Elkjunkie
New Member
Posts:3
19 Feb 2024 03:44 AM
I have a build progressing in WA and have a decision to make on the geothermal. I had originally planned for the geocool 5 ton and sized ducting for 2000cfm. Now their inverter series is out and the modular blower is only 1400cfm. I do heat almost exclusively with wood and have only thrown this system together to dump excess solar in the summer to AC. My dilemma is the original with a 64A max ocp vs the "new" 35A max ocp seems crazy far on both ends of the spectrum even considering the 600cfm reduction of the new Modular system. Not sure how you get 5 tons out of 1400cfm. In any event if anyone has any experiences to share with either geocool 5 ton units I'd love to hear. These are the model numbers I was referring to (GCHPD060TGTANXL) old ITEM HA23898 MODELSGCSHPM060IN, GCSCAM060GN, GCSBLM014, GCNV-VD00-3834
Attachment: Screenshot_20240218_193703_Gallery.jpg
newbostonconst
Advanced Member
Posts:778
19 Feb 2024 05:32 PM
I have two units both 4.8 tonn....one is a water to water and the other is a two stage bought in 2016. Capacitors in both units went bad but you with the inverter should be good. We have heated floor and it is about 80% the cost to run natural gas then the geo unit. So mostly use Geo for AC. The water to water takes the heat out of the floor and heats the water heater in the summer. We have lots of solar now and are constantly changing things around though.
The 2-stage name plate says draws 21.8 amp and I measure 17 amps fyi. We have 3700 sqft ICF house if that type of info you are looking for.
"Never argue with an idiot. They will only bring you down to their level and beat you with experience." George Carlins
newbostonconst
Advanced Member
Posts:778
19 Feb 2024 05:32 PM
duplicate....
"Never argue with an idiot. They will only bring you down to their level and beat you with experience." George Carlins
Elkjunkie
New Member
Posts:3
20 Feb 2024 02:52 AM
Thanks for the reply. It's good to hear your measured draw is only 77% of the value on the plate. I'm leaning toward the lower draw of the 2 units but a bit concerned about circulation in a 3200 foot home with only 1400 cfm to divide up. This is all a big experiment for me. The battery bank is what kills me. Even with the propane appliances I'm not overly confident with a 55.5kwh bank and 25kw array. I have a couple plug in hybrids. All the glass in the house probably had me closer to a 6 ton, but the energy scared me off. At least the ducting will suffice if I opt for the higher cfm. At least the oversized ducting for 1400 cfm will have lower static pressure for what that's worth.
newbostonconst
Advanced Member
Posts:778
21 Feb 2024 12:01 PM
We have a 35kwh battery bank and 28kw of panels...Put in a near vertical array (60 degrees - it does work really good) recently thinking I could use the excess solar to heat the house but that was a epic fail. When the sun is shinning the solar gain on the house heats the house to 77 degrees and like in summer the excess solar is just dumped. I do heat 50 gallons of water but that doesn't use much. When we put built the house we put a 9000 gallon pool that we haven't finish but hope next year we can dump solar to that. I think I am also going to get another 40kwh of battery soon. I am getting Lifepo4 quote that are are around $80 per kwh for cells if I buy 44 cells.
"Never argue with an idiot. They will only bring you down to their level and beat you with experience." George Carlins
Elkjunkie
New Member
Posts:3
24 Feb 2024 03:45 AM
That seems like a great deal on cells. Salvaged ev cells? I'm over 20k into batteries from fortress. I've got 63 rooftop panels and could squeeze another 21 if I fall really short when it's done. This is all DIY (I paid roofers though- I'm too old and scared for the pitch. I'm still hung up on the 1400 cfm being insufficient, maybe a bit more battery and the 2,000+ cfm would be the safer bet.
Attachment: Screenshot_20240218_193703_Gallery.jpg
newbostonconst
Advanced Member
Posts:778
27 Feb 2024 11:06 AM
They are new cells.
Nice house...
"Never argue with an idiot. They will only bring you down to their level and beat you with experience." George Carlins
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