Solar plant commissioned around 15th September which led to some delays in bill generation by tata power. They split the billing cycle of 30 into two periods (10+20) starting from 10th September when they installed the net meter. Here is a breakup of my energy bill for those 20 days. This roughly translates to a bill of INR 1923 by simply multiplying 1282 * (30 / 20).
Please note, this is a very crude and prudent estimate as the plant had not been running efficiently due to some hiccups highlighted in my blog.
Here is the solar consumption annexure I got with my bill which detailed the units I consumed, supplied to the grid and the net usage. As a basic check, I tallied this against what the monitoring device and the inverter had recorded.
The annexure clarifies two things which a lot of solar enthusiasts had asked me:
1. Treatment of excess units - the excess units are adjusted against next month's consumption. Also, if you are a net producer in a financial year the customer will be paid via cheque. However, this doesn't clarify how the tariff will be determined.
2. I have got a 50% subsidy in my fixed charges. However, the amount is subject to revision if there is any future notice from the goverment.