"60.0 kilowatt-hours of energy (equivalent to about 1.8 gallons of gasoline)"
Interesting. Just for an oranges to apples comparison, I wonder how many KWh the most efficient gas powered generator can produce on 1.8 gallons of gas.
Interesting. Just for an oranges to apples comparison, I wonder how many KWh the most efficient gas powered generator can produce on 1.8 gallons of gas.
"The gasoline-powered generators produce at best 6.13 kilowatt-hours per gallon of fuel, at worst 4.42, and a median of 5.7." [1]
So it sounds like it's ~5x as efficient as a gas generator. [1]https://settysoutham.wordpress.com/2010/05/26/portable-gener...
Electric motors are about 90% efficient.
So electric motors are about 5x more efficient than ICEs.
So to charge a 90kwh battery, you need roughly 99kwh of energy.
Which for me, since it's charging in my garage, the excess heat is actually kind of nice as it will keep my garage slightly warmer in the winter and thus my house as my garage is on the lower floor.
Either way, it's still WAY more efficient than any time of combustion engine. Including hydrogen. Hydrogen is kind of a wasted effort (unless we are doing fusion ;p )
https://www.eia.gov/tools/faqs/faq.cfm?id=427&t=3
Efficiency of coal plant is ~ 33%
http://www.eia.gov/electricity/annual/html/epa_08_01.html
Natural gas is about ~40%.
So in reality you are getting 90% of ~35% or 31.5%.
That's 11 hours at 3500W for 7.5gal == 5.1 kWh/gal.
1.8 gallons in that generator gives about 9.2 kWh. Or, 11.7 gallons to get 60 kWh.
Some other quick searching says gasoline has 33.4 kWH/gal and that typical gasoline engines in cars are around 25% and the best peak at maybe 35%, giving between 8.4 kWh/gal and 11.7 kWh/gal. Which is between 5 to 7 gallons for 60 kWh.