If the consumption is above 60 kWh per month the following CEB tariffs will be applicable
|Monthly Consumption kWh||Unit charge(Rs/kWh)||Fixed charge(Rs/month)|
According to above chart, a household with only 90 or less units of electricity consumption will get a bill of only around Rs 800. So the first 90 units is really cheap. In other words, there is no need to totally 0 your electricity bill. It is perfectly ok to have 90 units or less in the bill. We should generate solar electricity only to cover the units which are in excess of 90. If you are someone who uses less than 90 units per month, be happy! you are already doing great and are not a burden to environment. You don’t need solar for now.
Also, under net metering, it is not possible to have a system with less than 1kw of power. At least you system should be 1kw. Such a system would generate around 110 units per month. However there is no point in generating power to cover the first 90 units. So it makes sense to have a solar system if your electricity monthly consumption is around 200 or more. If it is below 180, it make no economical sense to have a net metering based solar system. Be happy, you are already doing ok!
If your usage is nearing 200 or above that, then you can actually save money by generating some solar units. (except the first 90 units!). Following chart shows exactly how many units you should generate in each case and what type of a system you will need for that.
|Units Used||Bill||units to generate||System needed||Panels||Solar Drive Package|