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Units Generated since Nov 2021 in Hyderabad - 6KW system - 335 W Poly panels- TATA.

Messed up copy paste in last comment. that was my consumption.

This is the generation.

Seems like a serious problem and will happen for many people if precautions not taken. :Shockked::Shockked::Shockked:

https://www.youtube.com/watch?v=Wom3YfQUzOc

But thinking about this more, this is like a major manufacturing flaw. if panels installed at a 15-17 degree incline cannot shed rain water and end up having problems like these, it is a design and manufacturing flaw and it is plain foolish if they blame the customer for this.

The jugaad solutions can help to some extent but this is purely a stupid design problem.

Today after rains last night, on a cloudy day, I got the maximum instantaneous genration of 2.93kw for my 3kw panel (9*335w Adani poly-cystalline).


This is my yearly generation till now. (Its slightly less than expected due to frequent small duration power cuts during afternoon)


The best peak perfomance was in Jan-Feb due to lower temperature on sunny days. After March due to very high temperatures (~45 celcius) the performance went down

Hello,
I have a query regarding upgrading my current 5 kw solar system at my home with 10 kw which I am already using in another setup.
My doubt is do I need to get any permission from Tamil Nadu Electricity Board?
Do I need to change the net meter ?
Or just swap the inverter and add 5kw extra panel from the 10 kw setup

Thanks🙂

You should inform the Board since in your application you would have asked permission for 5kw.
They won't know if you upgrade and it would probably work fine, but you would be on wrong side of law.

Also does your existing meter support 10kw? If that needs upgrading then surely you will need to inform them.

Thanks for the info
That’s also one of my query
Does net meter differ for a 5kv unit and 10 kv unit

If I have to deal with the tneb people I’ll rather not upgrade it
They took 3 months to deliver the net meter after I completed installing the panel and inverter for the existing system:Frustrati.They had no clue about netmering.It’ll be even worse if it’s regarding upgradation.

The max capacity of meter will be writted on it. I have a 3kw setup, and the company which installed provided meter with max capacity of 5kw. In my case the meter was provided by the installation contractor and they got it certified with the electricity department before installation. But yes, I agree dealing with deparment is frustating. They haven't seeded my account in their database and hence still after one year I have to manually give them import and export readings along with one application form to generate the bill. It was supposed to be online and automatic

Folks, very thankful for this thread with lots of info.

Quick question regarding net metering, are the produced units first subtracted from consumed units before rate slab is applied? For example if 210 units are consumed and 150 units produced, will the usage component of the bill be calculated as 210 - 150 = 60 units and that will be charged at 50*4.05 + 10*5.3 (approximate BESCOM rates)

It would be great if anyone can share an example bill with net metering, especially BESCOM bill.

Yes.

But one thing that makes On grid/grid tie solar less attractive in bescom is, you can only export the sanctioned load. Lets say you currently have 3kw sanctioned load, you want to install 5kw solar, you will then need to upgrade your sanctioned load which means, your monthly fixed charges whether you consume or not will be higher.

Bescom charges for first 1kw is ₹118 and ₹129.5 for every additional kw including GST. So for a 5kw connection you will have to pay ₹636 every single month. This keeps increasing every year.

Not to mention the initial deposit for every kw of sanctioned load.

Yes, they have almost doubled the fixed charges in the last two years. Builder had given 10KW connection. I am using 3KW +/- 10%, could have easily reduced to 5KW. But was keeping it for future (ACs and EV) and it was costing only couple of hundred rupees per month for the extra 5KW. Now it is 500 + tax and I am so not sure. (BESCOM rural is 85 for first KW and 100 per KW after that before tax)

BTW, I see tax of ~200 for 3500 bill, that's ~6%. Are you calculating it as 18%?

Yes, 1st Google search result said its 18% gst but on further more research, gst has been exempted for electricity bills and its upto the state government to fix the tax rate. So after seeing the bill for me it comes to 7% tax for bescom.
So in which case it will be ₹107 fixed charges for 1st kw and ₹117 for next consecutive kw including taxes.

Many people also fail to notice the FAC charge or fuel adjustment charges, which is the total units consumed x FAC. Highest I have seen is FAC of 0.74

It is these little details that get missed out. I wonder with net metering whether imported units will be used for FAC or net units?

That is why I was asking if anyone with net metering can post a copy of their bill (after masking personal details). It would be great if someone can share it, that will give full clarity.

I had a 3.52kW roof top plant installed and commissioned by Tata solar yesterday. However, the chart shows it peaking at around 2.5kW despite it being a cloudless sunny albeit winter day. Is that normal? The same thing has happened today. I was under the assumption that it will peak at 3.5. I’m located in Kerala very near the coast.

P.S: Ignore the time stamp in the chart please.