Is it worth installing rooftop solar panels in Bangalore without government subsidy?

arnprasad

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Hi All,

Couldnt find a forum to discuss solar installations in India and hence asking here.

(a) I live in Bangalore and my current consumption is around 320 units per month
(b) Today I got a quote from Tata Solar for 3KW at roughly 3 lakhs all inclusive (mono)
(c) My brother who installed same in Mysore (poly) - gets around 250 units a month on average although the promised units from Tata is 300 per month
(d) Hence on a simple back of the envelope calculation, if I spend 3 lakhs today, I will end up saving around 25K a year...so a payback period of more than 10 years
(e) Of course I am not considering increase in electricity tariffs, free electricity after pay back period...etc
(f) Unfortunately in Bangalore, Bescom could not enter into a contract with vendors wherein we get 40% subsidy.
(g) Most of the youtube videos on solar assume a very low installation cost, government subsidy and hence present a very rosy payback of 4-5 years which is not really the case, at least in Karnataka

Given all of the above - somehow I am not very sure if going solar makes sense right now. I am also looking at finding an Excel based calculator, wherein I can key in my existing numbers and it has inbuilt RoI calculator for 25 years.

Do let me know your experience if you have installed or considered installing but after doing calculations, gave up.

Bescom CEO has been making some statements as to why they could not find a vendor and promising they will enter into an agreement soon. I better wait for it or find another way of doing my calculations considering all the factors to see if it makes sense to invest today.

Also another related question regarding my consumption - it seems very high. Below is what I use it for
(a) I live in an independent 1+1 house
(b) I don't use the following: water pump, geyser, air conditioner, clothes Iron
(c) The heaviest usage gadgets include a washing machine - say 20 days a month, a 65 inch TV which say is on for 8 hours a day at least, one AVR, a 180 litre fridge
(d) we do use plenty of bulbs and tube lights but all of them are LEDs and hence they should consume not more than 100 W in total at any given point of time.
(e) I do have a UPS both in ground floor and one in first floor - am sure they do consume a lot to charge

I have changed electrical meters and didnt see any change in consumption. Is there anyway my house is "leaking" electricity? is that a thing? my house is 35 years old.
 
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yogibear

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3kw for 3 lakhs is very steep. A 10kw cost me 3.75L after subsidy. Else it would have been 5L.

Try other vendors. Solar panels are warranted for 20 years and inverter is warranted for 10.

It makes sense to install one asap. A unit for a unit despite per unit tarrif…

Yes, you will be permitted to install 80% of your installed connection capacity. Makes sense to increase that first.
 

aeroash

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Oct 11, 2010
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Mangalore
Hi All,

Couldnt find a forum to discuss solar installations in India and hence asking here.

(a) I live in Bangalore and my current consumption is around 320 units per month
(b) Today I got a quote from Tata Solar for 3KW at roughly 3 lakhs all inclusive (mono)
(c) My brother who installed same in Mysore (poly) - gets around 250 units a month on average although the promised units from Tata is 300 per month
(d) Hence on a simple back of the envelope calculation, if I spend 3 lakhs today, I will end up saving around 25K a year...so a payback period of more than 10 years
(e) Of course I am not considering increase in electricity tariffs, free electricity after pay back period...etc
(f) Unfortunately in Bangalore, Bescom could not enter into a contract with vendors wherein we get 40% subsidy.
(g) Most of the youtube videos on solar assume a very low installation cost, government subsidy and hence present a very rosy payback of 4-5 years which is not really the case, at least in Karnataka

Given all of the above - somehow I am not very sure if going solar makes sense right now. I am also looking at finding an Excel based calculator, wherein I can key in my existing numbers and it has inbuilt RoI calculator for 25 years.

Do let me know your experience if you have installed or considered installing but after doing calculations, gave up.

Bescom CEO has been making some statements as to why they could not find a vendor and promising they will enter into an agreement soon. I better wait for it or find another way of doing my calculations considering all the factors to see if it makes sense to invest today.

Also another related question regarding my consumption - it seems very high. Below is what I use it for
(a) I live in an independent 1+1 house
(b) I don't use the following: water pump, geyser, air conditioner, clothes Iron
(c) The heaviest usage gadgets include a washing machine - say 20 days a month, a 65 inch TV which say is on for 8 hours a day at least, one AVR, a 180 litre fridge
(d) we do use plenty of bulbs and tube lights but all of them are LEDs and hence they should consume not more than 100 W in total at any given point of time.
(e) I do have a UPS both in ground floor and one in first floor - am sure they do consume a lot to charge

I have changed electrical meters and didnt see any change in consumption. Is there anyway my house is "leaking" electricity? is that a thing? my house is 35 years old.
What's the reason for looking for an alternative source of energy? Is it because of the lack of continuous power, or the environment factor?

Solar energy is useful in places where continuous power is not available.
I had done considerable research on this and the costs involved just don't add up to make it viable. The general break- even on the initial investment is very loosely calculated to about 10 years. This is only for the initial investment, keep aside a good chunk every 5 years for recurring expenses to replace batteries.

Batteries are nowhere near being environment friendly, if that's your reason for going the solar way.

3kw for 3 lakhs is very steep. A 10kw cost me 3.75L after subsidy. Else it would have been 5L.
Cost depends on the efficency of the panels, lower the efficiency lower the cost. Monocrystalline, Polycrystalline, off-grid, on-grid blah blah
 

arnprasad

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Sep 17, 2010
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Vijayangar, Bangalore
I want to install from a reputed vendor as I want him to be around for 25 years to service the 25 years warranty. I checked with Loom as well and they are also quoting something similar.

I will try few other reputed vendors but I dont think there will be a huge cost difference. Except youtube videos, no one is selling 3 KW at 1.5 lacs.

In my case I am going for on grid and hence no additional cost of batteries. The 3 lakhs quoted is without battery for an On grid system.

Hoping BESCOM finalizes the vendors soon and we get the promised 40% subsidy.

The quote given by Tata is 2.7 lacs all inclusive but due to some tall trees next door, they need to raise the structure some 5 feet and hence the additional 30K for that to make it an even 3 lacs.
 

sud98

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Nov 13, 2008
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bangalore,india
The numbers never add up atleast in Bangalore. I did it for my villa community and home and it didnt work out. Though the Tata pricing seems more than what I was quoted (5kva for 5 lakhs). But it still doesnt make sense. The rated capacity for me is 12KVA which Tata wants me to reduce to make it more viable.
 
Last edited:

Hari Iyer

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Feb 8, 2010
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Mumbai
In a tropical country like India one of the biggest enemy of solar panels are dust settling down on the panels over time. Unless you have some mechanism to address this I shall not recommend any solar panel. The efficiency of the panels go down by 20% to 30% due to this dust and cleaning them usually is not a DIY job. With the mounting cost of cleaning services, this need to be factored in your costing. My 2 paise.
 
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