Then go to the off grid battery design stickie and do the calculator there.
I will point out that 8 hours anywhere in North America isn't happening.
Since this is more of a summer thing use the month it will operate that has the lowest insolation when operating
Cut battery size in half perhaps depending on what you need for a charge rate.
Or just post the spreadsheet for comment
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Funny, and true, but not helpful. Obviously the greatest damage they cause to the riparian area is just plain trampling. Trust me, I wouldn't worry about a few cows deciding the river is a bathroom when you've seen some of the things that get 'accidentally' dumped in there
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Problem is, they go directly in the stream.why don't the cows go directly to the streamLeave a comment:
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Thanks for your input.
With that in mind, I may put the romex in conduit or just get some standard wire. But the sizing is OK, right?
The most likely location (as it will vary) will be on the north side of a streambank with appx. 8+ hrs of full sun in the summer. Latitude is 42 degrees. The system(s) will not be used in the winter, they will be disconnected and the pumps removed.
The system will need to supply about 2500 gallons of water per day (75 cows estimated herd size x 30 gallons/day per cow = 2250, not counting for tank leakage/evap/increased usage in hot weather), which the pump can easily handle at 3 gallons per minute, which is 4320 gallons per day. The batteries are simply insurance for cloudy days; it is doubtful the system will actually run at night. Considering the pump will need to run for 12 hrs to supply enough water, I may need a slightly bigger panel (200W) to keep the batteries up while the pump is running.
The system will use the on-demand feature of the pump; a float will shut off the flow of water when the tank is full, causing the pressure in the pump to increase triggering the pressure switch. A small accumulator at the pump will help prevent rapid cycling due to minor leakage.
The whole point of the off-site watering system is to keep the cows off the stream to protect the riparian area for environmental conservation. If you don't know what this is consider wikipedia: https://en.wikipedia.org/wiki/Riparian_zoneLeave a comment:
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Romex is not suitable for exterior applications use type UF
Without knowing location and run time it can't be said if it will work or not.
Lastly why don't the cows go directly to the streamLeave a comment:
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Installing Off-Site Watering Setup
Hello all, this is my first post to this solar forum!
I was wondering if all you wonderful folks here could give me some advice on some off-site stock watering systems I'm going to be installing next year. I've already planned this out; so here's my plan:
The solar panel will be a 180-190 watt 24V panel; I'm not sure as of yet on which panel to buy since my usual carrier (SunElec) doesn't carry a 180 watt panel anymore, I may hook two 80/90 watt panels in parallel but that is undesirable for weight/bulk reasons.
It will have two 75Ah backup batteries (http://www.northerntool.com/shop/too...8001_200338001) linked in series for 24v, with a Instapark PRS-1515 (http://www.amazon.com/Instapark%C2%A.../dp/B00B138XRC) charge controller.
The pump will be a Shurflo 2088-474-144 24V pump (http://www.amazon.com/SHURflo-2088-4.../dp/B002MWFFVS). There WILL be a filter on it, I know from experience drawing water from a stream without a filter is inviting bad luck.
The entire solar panel/battery/controller will be mounted on one pole. The batteries and the charge controller will be in a vented box mounted on the pole as they are being installed in a flood area; a 12 gauge solid Romex wire will be used for all wiring, although I may use a 10 gauge to the pump depending on how long the run is to the pump itself.
So, what do you think?
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