This is a very basic look at running a small cabin with very limited / basic appliances. Skip to 5minute mark to get to the relevant stuff
https://youtu.be/a-l8EFQkIKQ
https://youtu.be/a-l8EFQkIKQ
YouTube
Choosing Low Wattage Appliances for my Off-grid Solar Setup
It's not just about having enough panels and battery power to operate your off-grid home. Choosing the right appliances and checking how much power they will draw and making sure they are compatible with your electrical system is of paramount importance.…
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I posted a few days about about running saws and drills that use brushed motors on 120v dc. I just revised that article to reflect some additional info.
Brushed “universal AC” motors are series wound. That means the coil and the stator are in series with each other and oppose each other until they make a certain strength magnetic field. Until that magnetic field reaches its peak, they will draw more and more power. If the voltage is low they will draw more amps. Twice as many amps means 4x the heat. This is why long extension cords melt. Long cords mean less voltage at the far end and the motors draw more amps.
So don’t be afraid to feed them voltage just a hair over 120v.
https://t.me/OffTheGridOfficial/6681
Brushed “universal AC” motors are series wound. That means the coil and the stator are in series with each other and oppose each other until they make a certain strength magnetic field. Until that magnetic field reaches its peak, they will draw more and more power. If the voltage is low they will draw more amps. Twice as many amps means 4x the heat. This is why long extension cords melt. Long cords mean less voltage at the far end and the motors draw more amps.
So don’t be afraid to feed them voltage just a hair over 120v.
https://t.me/OffTheGridOfficial/6681
Telegram
Off The Grid
You can run your hot water heater or other heaters directly off 120vDC or 240vDC if they are rated for 120vac or 240vac... BUT... the switches will fail. For example, the thermostat of a hot water heater will fail the first time every time. You must use…
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My wife told me she'll slam my head into the keyboard if I don't get off the computer.
I'm not too worried.
I think she's just jokinsdnbfjadskbngfsjkgbsafgfsgadfgdfgdf
I'm not too worried.
I think she's just jokinsdnbfjadskbngfsjkgbsafgfsgadfgdfgdf
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Off The Grid
Video
This is used for soundproofing but it also works for stopping thermal conductivity.
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https://pvwatts.nrel.gov/pvwatts.php
You can plug your address into PVwatts, tell it the kW of solar panels, look in the advanced section and put in your DC-AC ratio, and it'll use historical cloud cover for your area to make predictions for solar production. How accurate is it? I plugged in my system and it gave me results broken down by month. December should see 100.55kWh per day and according to my own calculations, I'm averaging 99.59 per day since Dec 1. I'll call that a win.
Europeans: use this link https://re.jrc.ec.europa.eu/pvg_tools/en/
A note about DC - AC ratio. If you look under advanced parameters, you'll find DC to AC size ratio. One on my arrays has 19.5kw of solar with 15.8kw of inverters. That's 1.23. Another array has 11kw of solar with 6kw of inverters and that is 1.83. Be sure to select ground or roof mount and bifacial in the advanced section. Everything else is pretty much good to go.
You can plug your address into PVwatts, tell it the kW of solar panels, look in the advanced section and put in your DC-AC ratio, and it'll use historical cloud cover for your area to make predictions for solar production. How accurate is it? I plugged in my system and it gave me results broken down by month. December should see 100.55kWh per day and according to my own calculations, I'm averaging 99.59 per day since Dec 1. I'll call that a win.
Europeans: use this link https://re.jrc.ec.europa.eu/pvg_tools/en/
A note about DC - AC ratio. If you look under advanced parameters, you'll find DC to AC size ratio. One on my arrays has 19.5kw of solar with 15.8kw of inverters. That's 1.23. Another array has 11kw of solar with 6kw of inverters and that is 1.83. Be sure to select ground or roof mount and bifacial in the advanced section. Everything else is pretty much good to go.
pvwatts.nlr.gov
PVWatts - NREL
Estimates the energy production and cost of energy of grid-connected photovoltaic (PV) energy systems throughout the world
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Forwarded from The Deer Blind (Eighty🍁Canadian)
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Orchard Drones. They're taking our jobs!
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Forwarded from Ancaipira
Here on this website you have everything you need to know and you can even contact them and they will guide you in the best possible way and they have spectacular micro hydroelectric plants, both for on grid (asynchronous) and off grid or hybrid systems with (permanent magnet generator)
https://h-hydro.com/
https://h-hydro.com/
Hartvigsen Hydro
Micro Hydro Power
We are a worldwide supplier of micro hydro components including turgo runners, housings, nozzles and generators.
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Parenting boys.... tricycle motors and curtain climbers
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https://www.youtube.com/shorts/1OKaC0hPxjc and don't forget to season the pan with some lard.
YouTube
Polishing Cast Iron
Source: Bviral
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Forwarded from HickTown (Hammer)
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Amp Interruption Calculation_Tech_Lib_Electrical_Formulas.pdf
446 KB
Dont know who might need this, but here's the formula for calculating the amp interruption rating needed for a main breaker from your utility service. I wrote this spread sheet a few years ago. Originally my solar system had a shutoff that killed the backfeed from the solar inverters. But since I've reorganized my system, that switch has been bypassed. Next week I'll be routing my service entrance cabling from the meter base thru a 100amp lockable shut off switch. It is required by code to have a lockable shut off when backfeeding the grid. Since I can't separate my solar, I'll just separate the whole house.
Basically, at 25kva transformer can deliver 100amps @ 240vac but in the case of an arc fault, it could deliver 8000amps of surge. If you have a longer feeder like I do (275ft), resistance of the wires to the pole will limit that current. So my limit is 2916amps. This is well within the limits of the fused knife switch and the 1 AWG cable I'll be using.
Basically, at 25kva transformer can deliver 100amps @ 240vac but in the case of an arc fault, it could deliver 8000amps of surge. If you have a longer feeder like I do (275ft), resistance of the wires to the pole will limit that current. So my limit is 2916amps. This is well within the limits of the fused knife switch and the 1 AWG cable I'll be using.
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