Solar-Apps

Benefits

A great way to save lots of money on your electric bill each year is to install solar panels for homes. Solar panels use energy from the sun to power your home. This renewable energy resource will eliminate your home’s electric expenses and also help the environment. Solar panels require a moderate one-time investment; however, they usually pay for themselves in five years or less. Due to their increase in popularity, installation expenses have decreased by 30% in the past few years and the Government provides handsome subsidies for approved projects.

Considering the massive subsidies given to those who purchase solar panels, as well as the amount of money you’ll save in electricity bills, this eco-friendly home improvement is a smart investment. If you live in an older home that needs roof repairs in the near future, it makes financial sense to consider purchasing solar panels for your roof instead of patching and repairing the existing roof. Also, if your roof is south-facing and is fully exposed to the sun (meaning that there are no leafy tree branches overhanging and shading your roof), you will greatly benefit from installing solar panels on your rooftop. The easiest and cheapest solar panel installation is reserved for flat roofs with tar or chip roofing.

Aren’t we all looking for ways to lower our utility bill? By making a small one-time investment in solar panels, you can permanently say good-bye to your electric bill. Other long-term benefits of solar panels include:

Compensation by the state government for electricity you produce.
Save on rooftop maintenance costs (solar panels, once installed, require very little maintenance).
Help conserve Earth’s precious nonrenewable energy resources.
reduce your carbon footprint and avoid polluting the environment.
Set a good example for other aspiring "green-living" homeowners in your town.

FIT

Sr No	SERC	Rooftop PV and small solar		Remarks
Sr No	SERC	Rooftop PV	Small solar thermal	Remarks
1	Andhra Pradesh Final Dt: 14.07.2010	Rs17.91/kWh	Rs15.31/kWh	Tariff period: 25 years, tariff inclusive of Accelerated Depreciation (AD). In case AD is availed, tariff shall be reduced by Rs.2.96/kWh for PV and Rs.2.46/kWh for solar thermal (Tariff is same as given for utility-scale solar PV and solar thermal projects by CERC )
2	Assan Drift Dt:13.08.2010	Tariff as determined by CERC		Tariff period: 25 years.
3	Bihar Final Dt: 06.08.2010	Rs. 17.91/kWh		Tariff period: 25 years, tariff inclusive of Accelerated Depreciation (AD). In case AD in availed, tariff shall be reduced by Rs.2.69/kWh (Tariff is same as given for utility-solar PV projects by BERC ).
4	Chhattisgarh Dt: 09.07.2010	Rs.15.84/kWh	Rs.13.26/kWh	Tariff period: 31st August 2018. The commission is in the process of review of tariff and same wil be applicable once notifled. (Tariff is same as given for utility-scale solar PV and solar thermal projects by CSERC ).
5	Delhi Final Dt:09.07.2010	Tariff as determined by CERC		Tariff period: 25 years.
6	Gujarat Final Dt:31.08.2010	Rs.15/kWh for first 12 years; Rs.5/kWh for next 13 years Or Rs.12.54/kWh for 25 years.	Rs.11/kWh for first 12 years; Rs.4/kWh for next 13 years Or Rs9.29/kWh for 25 years.	Tariff period: 25 years. The tariff has taken into account the benefit of accelerated deprecation. Two options are available for such projects. (Tariff as given for utility-scale solar PV and solar thermal projects by GERC and alternatively a constant levellised tariff throughout the project life viz. for 25 years).
7	Haryana Final Dt:08.07.2010	Tariff as determined by CERC		Tariff period: 25 years.
8	Jammu & Kashmir Final Dt:02.06.2010	Tariff as determined by CERC		Tariff period: 25 years.
9	Jharkhand Final Dt:12.07.2010	Rs. 17.96/kWh		Tariff period: 25years, tariff inclusive of Accelerated Depreciation (AD). In case AD is availed, tariff shall be reduced by Rs.2.98/kWh (Tariff is same as given for utility-scale solar PV project by JERC ).
10	Karnataka Final Dt:13.07.2010	Rs. 14.50/kWh		Tariff period: 25 years. (Tariff is same as given for utility-scale solar PV project by KERC ).
11	Kerala final Dt:04.08.2010	Rs. 17.91/kWh		Tariff period: 25years, tariff inclusive of Accelerated Depreciation (AD). In case AD is availed, tariff shall be reduced by Rs.2.96/kWh (Tariff is same as given for utility-scale solar PV project by KSERC )
12	Maharashtra Final Dt:14.07.2010	Rs. 18.41/kWh		Tariff period: 25 years, tariff inclusive of Accelerated Deprecition (AD). In case AD is availed, tariff shall be reduced by Rs.2.96/kWh (Tariff is Rs.0.50/kWh in addition to utility-scale solar PV projects tariff given by MERC ).
13	Madhya pradesh Final Dt:06.07.2010	Rs. 15.49/kWh		Tariff period: 25 years, tariff inclusive of Accelerated Deprecition (AD). In case AD is availed, tariff shall be reduced by Rs.1.41/kWh.
14	Orissa Final Dt:09.07.2010	Rs. 18.52/kWh		Tariff period: 25 years, tariff inclusive of Accelerated Deprecition (AD). In case AD is availed, tariff shall be reduced by Rs.3.13/kWh.
15	Rajasthan Final Dt29.09.2010	Rs. 15.32/kWh	Rs. 12.58/kWh	Tariff period: 25 years, tariff inclusive of Accelerated Deprecition (AD). In case AD is availed, tariff shall be reduced by Rs.2.13/kWh for roof top PV and Rs.1.59/kWh for small solar thermal projects (Tariff is same as given for utility-solar PV and solar thermal projects by RERC ).
16	Tamil Nadu Final Dt:27.05.2010 Dt:08.07.2010	Rs. 18.45/kWh	Rs. 15.51/kWh	Tariff period: 25 years, tariff inclusive of Accelerated Depreciation (AD). In case AD is availed, tariff shall be reduced by Rs.4.11/kWh for roof top PV and Rs.3.35/kWh for small solar thermal projects.
17	West Bengal Final Dt:10.08.2010	Rs.16.13/kWh		Tariff period: 25 years (Tariff is same as given for utility-scale solar PV projects by WBERC )

ROI

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Subsidies

Under the JNNSM off-grid policy, under certain conditions, the MNRE provides subsidies @ Rs. 81/Wp to offset the capital cost of the project. The MNRE recently revised this capital subsidy and benchmark cost of SPV systems on April 1, 2011. Please click, download, and understand your options by from:

Revised Capital Subsidy and Benchmark cost of the SPV system.pdf

So, for a 10 kWp with one-hour battery back-up, the Rs. 27 lakhs capital costs (@ Rs. 270/Watt) will be offset by Rs. 8.1 lakhs or only Rs. 18.9 lakhs (Rs. 270/Watt – Rs. 81/Watt = Rs. 189/Watt) or about a 30% discount.

Solar-Apps will take care of the entire process for you. We will provide you with a free needs assessment and based on your project configuration measured in kWp, we offer a simple fixed-price model in slabs of 20 kWp, 80 kWp, 400 kWp, and 500 kWp.

For projects that meet the minimum criteria set forth by the MNRE, our goal is to hand over the subsidy in two installments within 6-months or your money back. How we do this is through a strategic tie-up with MNRE channel partners that are CRISIL 1A certified. Knowing where your money is coming from as well as the control is always promises to be a less stressful option.

LI-ION

Do you want your home to begin saving and making money for you? If so, consider solar panels for your rooftop. Comparison between VRLA and lithium batteries:

#	Attributes	VRLA	Lithium
1	Chemistry medium	Acidic	Alkaline
2	Electrodes material	Lead, calcium	Lithium polymer
3	Nominal cell voltage	2.00 V per cell	3.60 V per cell
4	Rated capacity	10 h	1 h
5	Rated cell capacity	300 Ah or 800 Ah	4 cells of 75 Ah in parallel
6	End cell voltage	1.75 V per cell	2.5 V per cell
7	Normal charge current	Max 10 % of the Ah	Up to 20 times of Ah
8	High Rate charging	Not recommended/ possible	Allowed up to 40 times the Ah
9	Ah efficiency	80%	98%
10	Life cycle at 90 % DOD	Not recommended	3,000 cycles
11	Life cycle at 80% DOD	~ 600 c/s	4,000 c/s
12	Life cycle at 20% DOD	Max 1,000 c/s	>5,000 c/s
13	Operating temperature	Ideal to operate at 27 ⁰C	Operates comfortably at 50 ⁰C
14	Individual cell protection battery monitoring system	Not provided if required would be extra cost	In-built in each cell
15	Resistance to over-charge	Vulnerable	Protection in-built no issues
16	Undercharge	Separate relay is to be provided at extra cost	In built no issues
17	Max Discharge current	NA	Up to 40 times the capacity in pulses or 20 times the capacity continuously
18	Mechanical dimensions	Standard	Require only 30 % of all dimensions
19	Weight/Mass	Standard (Very High)	Only 30 % of the weight of VRLA
20	Thermal run away issues	Suffers at high temperature - also if charging voltage is increased beyond 2.25 V - 2.30 V per cell	Because of in-built protection system, no issues
21	Routine maintenance	Required	Not required
22	Effect of impact	Not much	Not advisable
23	Hydrogen generation during charging/ discharge	Yes Hydrogen is evolved in reaction	No such issues
24	Power loss during charging	> 15 %	2 %
25	Repeated deep discharge	Limited	No harm
26	Short Circuit even accidental	Dangerous	Protected
27	Loss of charge in storing	Gets discharged	Very low
28	Effect of storage	Sulphation set in	No issues
29	Period of storage	< 6 months	No issues
30	Charging with wrong polarity	Battery is spoilt	Dangerous
31	Charging time from fully discharged to fully charged	8-10 h based on the current	80% of the charge can be restored in 40-60 m
32	Foot prints	Standard	Only 30 % Of VRLA footprint
33	Normal average life	3 to 3.5 years	10 years
34	No. of replacements in 10 years	Minimum 3	None
35	Cost	Average	Higher
36	Salvage value	Yes	Yes
37	Total cost over the life time	More	Economical
38	Immersion in water	Not much harm	Not recommended
39	Ventilation requirement	To be provided to ensure the hydrogen content is limited to < 2% by volume of the room	Not Applicable
40	Environmental issues	Concern	None


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