I just made the local MLA's PA call the AE and the next day birectional meter was set and meter started working. You can try something like that
The bidirectional meter is at times given to those who pay a special price aka bribe and the AE even charges 25k for the gadget up and above telecom(discom) charges. The ones commissioned after us can also get it done before us and we will be told no stock. Each couple of months it saves me 14k and so the first couple of months of delay (45 days exactly), it was a loss to me and i keep cursing myself for not swiftly applying political duress/pressure against the EB officers in charge. And the local MLA's PA's call did it in a jiffy. So my 45 days of inaction could easily have been 180 days. We have to get into action or they don't do their jobs.
Net meter is a term but the actual meter that will be installed is a bidirectional meter. This has two readings - import (the grid consumption) and export (the generated power from your solar DC panels converted to AC by the inverter and passing to your bidirectional meter. The nett (import minus export) is your amount to be paid however they charge you in addition something called net charges. Net charges is say you have generated 1000 units you will be charged a constant rate per unit say Rs.1.27/unit for net feed in. if you have opted for net metering they would charge you only 20% of this 1.27 which is 25 paise per unit. Thats Rs.250 extra. With net feed in, you pay for the grid consumption(import tariff) separately and you get paid for the exported units minus Rs.1.27 aka the nett charges. In TN this translates to Rs.3.61 minus 1.27 per unit or 2.44 rs per unit. For those in TN with just 300 or 400 units in 2 months consumption might stand benefitted with net feed in. But for those with a huge consumption, net metering makes sense due to higher slabs exceeding 1000 units.
They have an area tension capacity limit for ongrid. Its a red tape they can use to prolong the approval. As this is grid connected and the load is passed on to the transformer from your generated solar. Which is why in ongrid solar your solar stops functioning if there is a power cut. As it could be due to maintanance and the worker would still get a shock due to your power generation. Taking them to court will not work in this regard as safety will be used as a plea and you cant prove their load capacity limit or handling power thereof.
