1kw Solar Panel
Some electric billing questions?
could you help solve these problems with working (thanks)
the average household uses 7400kWh
a) Installation of Solar Panel systems represents one way households can reduce the demand for
electricity on state electricity resources. A 1kW system of Solar Panels can produce a maximum of
3.9kWh of electricity per day. How many 1kW Solar Panel Systems would need to be purchased to
meet the average power consumption of a NSW house?
b) At $6000 fully installed for a 1kW Solar Panel System after rebates, how much would the average
household pay for solar panels that meet their average electricity needs?
c) Assuming electricity bought from the grid costs 18cents per kWh and prices do not rise in the
future, how long will it take for the household to start saving money?
what is the time needed for the 7400kWh household use. if it is a year, then the calculation will go like this.
a)
(7400kWh/year) / (365days/year) = 20.27 kWh/day
20.27 kWh/3.9kWh = 5.19 panels.
you will then need 6 panels. You will generate 8541kWh/year
b)
6 panels * $6000 = $36,000 to install the panels
c)
7400kWh x $ 0.18 = $1332 /yr saving
payback = 36000/1332 = 27 years.