How many kilowatt hours of electricity can lead-acid batteries store at most

KW · h is 1000 * V * ah. For the common 12V single cell battery, the maximum capacity can be increased by 12v250ah, then the conversion is 12V * 250ah = 3000vah = 3000wh = 3kwh, the maximum 2v4000ah of 2V is 2 * 4000 = 8kwh, the maximum 250A of 6V is 1.5kwh

If each person saves 1 kilowatt hour of electricity every year, how much of the energy saved by the 1.3 billion people in China is equivalent to the energy released by burning standard coal?
The calorific value of standard coal is 2.9 * 10 7 times J / kg, which needs to be processed

The electric energy saved by 1.3 billion people in China is: w = 1 kwh x 1.3 billion = 130 million kwh
Q = w = 130000000 kwh = 130000000x3600000j = 4.68x10 ^ 15J
m=Q/q
= (4.68X10^15J) / (2.9*10^7J/kg)
=1.61X10^8kg
=1.61x10 ^ 5 tons
A: equivalent to 1.61 x 10 ^ 5 tons of standard coal combustion energy

15 kg of coal can generate 24 kwh. How many kwh can be generated per kg of coal? How many kg is needed to generate 1 kwh?

24 / 15 = 1.6 kwh / kg coal
15 / 24 = 0.625 it takes 0.625kg to generate 1 kWh

In order to encourage energy saving, a municipal power company has stipulated the following calculation method of electricity charge: 0.52 yuan per kilowatt hour if the electricity consumption is less than 100 kilowatt hours per month; 0.6 yuan per kilowatt hour if the electricity consumption is more than 100 kilowatt hours per month. Xiaomingjia paid 64.4 yuan in October, and how many kilowatt hours is the electricity consumption

=(64.4-100*0.52)/0.6+100
=120.67 (KWH)

How many kilowatt hours of electricity can lead-acid batteries store at most