At present, the electricity price of a city's residents is 0.52 yuan / kWh. The residents who install time-sharing meters implement electricity price. The charging standard is shown in the following table: Peak time (8:00-21:00) valley time (21:00-8:00 the next day) Hourly electricity price per kilowatt / RMB 0.55 0.35 Xiaogang's monthly electricity consumption is 140 kwh, and the valley hour electricity consumption is 3 / 7 of the total monthly electricity consumption? If a time-sharing meter is installed, how much is the electricity charge this month?

At present, the electricity price of a city's residents is 0.52 yuan / kWh. The residents who install time-sharing meters implement electricity price. The charging standard is shown in the following table: Peak time (8:00-21:00) valley time (21:00-8:00 the next day) Hourly electricity price per kilowatt / RMB 0.55 0.35 Xiaogang's monthly electricity consumption is 140 kwh, and the valley hour electricity consumption is 3 / 7 of the total monthly electricity consumption? If a time-sharing meter is installed, how much is the electricity charge this month?

No time-sharing meter installed, electricity charge = 140 * 0.52 = 72.8 yuan
Using time-sharing electricity meter, electricity charge = 140 * 4 / 7 * 0.52 + 140 * 3 / 7 * 0.35 = 41.6 + 21 = 62.6

At present, the electricity price of a city's residents is 0.52 yuan / kWh. The actual peak valley electricity price of the residents who install time-sharing meters is as follows: time peak electricity price
Hour (8:00-21:00) Valley hour (21:00-8:00 the next day)
Hourly electricity price per kilowatt / RMB 0.55 0.35
Xiaohua's monthly electricity consumption is about 100 kilowatt hours, and the peak hour electricity consumption is 2 / 3 of the peak hour electricity consumption. Before installing the time-sharing meter, how much is the monthly electricity charge? After installing the time-sharing meter?

The electricity price of a city's civil use is 0.52 yuan per kilowatt hour. The residents who install time-sharing meters implement the peak valley electricity price. The peak hour consumption of 5 units is 150 * 5 / 8 = 93.75 kilowatt hour, and the valley hour consumption is 150-93.75 = 46.25

The current electricity price of a city is 0.52 yuan / kWh,
The specific charging standards are as follows: peak hour (8:00 ~ 21:00) and valley hour (21:00 ~ 8:00 the next day). The hourly electricity price per kilowatt hour (RMB) is 0.55035
Xiaohong's electricity consumption is about 100 kwh a month, of which the peak hour electricity consumption is 2 / 3. Is it cost-effective for Xiaohong to install time-sharing meters? (please explain the reason through calculation)

1、 Without time-sharing meter:
52 x 100 = 52 yuan
2、 Installation time table:
Peak hour power: 100 ÷ (1 + 2 / 3) = 60 kwh;
Valley hour power: 60x (2 / 3) = 40 kwh;
0.55x60 + 0.35x40 = 47 yuan
47 yuan