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Horsepower Calculator Enter your vehicle's quarter mile time (assuming you know it) and vehicle weight and this program will display your car's estimated horsepower.
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Off Grid Battery Bank
Building a battery bank and having a method of keeping them charged is one of the first steps in building an alternate energy system for off grid applications. A battery bank can be used to run lighting, t.v., radio, microwave, etc.
Sizes range from a few batteries, a charging system and an inverter, to hospitals and universities that need power for lighting and important equipment.
All battery systems have to be properly recharged. This is done by the generator or other source of alternate energy. The larger the system, the larger the generator or other source of charge has to be.
Batteries are rated in voltage and ampere hour capacity. The greater the amp hour capacity of the battery bank, the longer it can power equipment before needing to be recharged. Energy from the generator or alternative energy source can be stored for later use.
With the cost of fuel, oil and maintenance it makes sense. Rather than running a generator all the time to get power, it only has to be operated when equalization charging takes place and when the system does not have sufficient capacity to power heavy loads.
The initial investment in a battery bank is well worth it, providing power 100 percent of the time. Battery backup is increasingly used in grid tied systems as well.
Battery banks are wired and sized to produce energy needed in voltages ranging from 12, 24, 48, 60,vdc and sometimes higher. The higher the loads (demand) placed on the system, the higher the voltage has to be to match the input voltage required by more powerful inverters that are needed for larger loads.
Once you have figured out your daily watt hour consumption and have revised that figure by practicing energy management, you can calculate your battery capacity.
Use the following formula.
(watt hours) wh/day x days of storage x bat.eff. x dod(depth of discharge) = ampere hours. battery efficiency ( 75-90%) effbat battery voltage ( 12,24,48,60+,etc ) maximum depth of discharge from( 20-80% )
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Basic Energy Formulas And Equivalents - Appliance Average Consumption Ratings
Energy is ability to do work. 1 newton of force over 1 meter is 1 newton-meter or joule or watt second of work done.
The speed of light in a vacuum is approx 2.998 * 10^8 meters/second or 186,000 miles per second. rounded off 3 * 10^8 meters/second.
watts = amps x volts or p(watts)= i(current) x e(voltage)
note: 1 kw = 1000 watts
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