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  • Robert61 commented on Von Malegowski's instructable How to Cut Glass Bottles2 months ago
    How to Cut Glass Bottles

    I believe a diamond saw blade will cut glass. You could put one in a table saw Or better still, a tile saw and simply cut the glass slowly. If the blade is not big enough you simply cut one half, and flip the bottle over and run it through again. Be sure to wear goggles.

    I believe a diamond saw blade will cut glass. If I needed to cut a square bottle, I would try that. You could put one in a table saw or better a tile saw, and then cut the glass like you would a tile. Be sure to wear goggles, and gloves in case it breaks funny. If you don't have one, you can rent them from some Home depots

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  • Robert61 commented on deba168's instructable DIY OFF GRID SOLAR SYSTEM7 months ago
    DIY OFF GRID SOLAR SYSTEM

    Your electrical needs are too great for a solar system to outright power the heater, so you have to find a way to save or sell the power from the solar array. Your 240v 112.5amp system is as big as a system for an entire house. You might want to consider a thermal hot water system for your pool heater (the kind of system that has black water pipe on the roof of houses), it would be less expensive. If you want to do it using solar, either your system has to be big enough to power the peak load of the heater, which would require a 27kWh (kilo Watt hour) solar array, (3 to 7 kWh is normal for a house) or you will need a normal sized array with a battery system to store the power to power the pump which would require huge batteries (Also expensive)One other choice is to have a 5-7kWh sol...see more »Your electrical needs are too great for a solar system to outright power the heater, so you have to find a way to save or sell the power from the solar array. Your 240v 112.5amp system is as big as a system for an entire house. You might want to consider a thermal hot water system for your pool heater (the kind of system that has black water pipe on the roof of houses), it would be less expensive. If you want to do it using solar, either your system has to be big enough to power the peak load of the heater, which would require a 27kWh (kilo Watt hour) solar array, (3 to 7 kWh is normal for a house) or you will need a normal sized array with a battery system to store the power to power the pump which would require huge batteries (Also expensive)One other choice is to have a 5-7kWh solar system, and sell the power to the utility company, and run the pool heater at night when electricity is cheap and have your electric bill for your heater and house be paid for by the power you sell to your utility company. You can do this if your utility has a "Net Energy Metering" available. Or you could put in a small unit to just pay for the heater, of about 2 to 4 kW. and pay your house electric bill. The size needed depends on how much you run the heater, and how hot you keep the water.Your formula to figure out what you will need is 240v X 112.5amps X (number of hours pool heater runs each day) = total kWh needed daily for your pool heater. Solar systems are rated in kW and should provide power for about 5 hours per day on average. So divide the kWh needed for the pool heater, by 5 hours per day of Sun, and that is the size in kW of the solar array needed to just cover the electricity for the pool heater. You should adjust the 5 hours of light to better reflect the sun in your area.

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