CheckPre

Hyderabad Solar Calculator (TGSPDCL)

Rooftop solar payback for Hyderabad on TGSPDCL, where crossing 200 units a month moves every unit to a dearer table.

Updated · By Niraj Kumar · 1 source

Your home

Solar forSolar for
From your bill, enterFrom your bill, enter
₹
₹100₹50K

About 412 units a month on the TGSPDCL tariff. Use a year's average if your bill swings with the seasons.

Roof typeRoof type

Fine-tune

kW

Sized to cover a year of your consumption, at 5.5 peak sun hours a day in Telangana.

sq ft

About 100 sq ft per kW. Leave at 0 for no limit.

₹

Typical for an on-grid system from an empanelled vendor. Replace it with your quote.

%
0%15%

Indian residential tariffs have historically risen 4-7% a year.

%
0%2%

Monocrystalline panels typically lose about 0.5% a year.

How you payHow you pay
Pays for itself in2.8 yearsthen ₹14.43 L ahead after 25 years

A 3 kW system makes about 386 units a month, 94% of your use. Your bill drops from ₹3,000 to about ₹121 in year one.

Installed cost
₹1,80,000
PM Surya Ghar subsidy
− ₹78,000
Net cost to you
₹1,02,000
Saving in year one
₹34,529
Return (IRR)
38.2% a year
over 25 years, before tax
CO₂ avoided
79 tonnes
over 25 years
Subsidy43%
  • You pay57%
  • Central subsidy43%
Your money over 25 yearsStill to recoverAhead
₹-5 L₹0₹5 L₹10 L₹15 LPayback, year 2.804812162025
Year-by-year cash flowShow
YearUnits madeBills without solarBills with solarUpkeep and EMIsRunning total
14,637₹35,985₹1,456₹0-₹67,472
24,614₹37,784₹1,578₹0-₹31,266
34,591₹39,673₹1,708₹0₹6,699
44,568₹41,657₹1,847₹0₹46,508
54,545₹43,740₹1,995₹0₹88,253
64,523₹45,927₹2,153₹1,800₹1,30,226
74,500₹48,223₹2,322₹1,800₹1,74,327
84,477₹50,634₹2,502₹1,800₹2,20,660
94,455₹53,166₹2,693₹1,800₹2,69,332
104,433₹55,824₹2,897₹1,800₹3,20,459
114,411₹58,615₹3,115₹1,800₹3,74,160
124,389₹61,546₹3,346₹22,800₹4,09,559
134,367₹64,623₹3,593₹1,800₹4,68,790
144,345₹67,854₹3,855₹1,800₹5,30,989
154,323₹71,247₹4,895₹1,800₹5,95,541
164,301₹74,809₹5,282₹1,800₹6,63,269
174,280₹78,550₹5,694₹1,800₹7,34,325
184,259₹82,477₹6,134₹1,800₹8,08,869
194,237₹86,601₹6,602₹1,800₹8,87,068
204,216₹90,931₹7,101₹1,800₹9,69,098
214,195₹95,478₹7,633₹1,800₹10,55,143
224,174₹1,00,252₹8,200₹1,800₹11,45,395
234,153₹1,05,264₹8,802₹1,800₹12,40,057
244,132₹1,10,528₹9,444₹1,800₹13,39,341
254,112₹1,16,054₹10,127₹1,800₹14,43,468

How the Hyderabad Solar Calculator (TGSPDCL) works

Saving₍y₎ = [Bill(U) − Bill(U − G₍y₎/12)] × 12 × (1 + e)^(y−1), G₍y₎ = kW × H × 365 × PR × (1 − d)^(y−1)

This page uses the same method as the Solar ROI Calculator India, which explains each term and assumption in full.

Worked example

A Hyderabad home on TGSPDCL with a ₹3,000 monthly bill and a flat RCC roof, assuming prices rise 5% a year.

  1. 1Working the bill back through the TGSPDCL slabs, charges and duty gives about 412 units a month
  2. 2At 5.5 peak sun hours, 3 kW makes about 386 units a month, 94% of that use
  3. 33 kW at ₹60,000 per kW costs ₹1,80,000; PM Surya Ghar pays ₹78,000, leaving ₹1,02,000
  4. 4The first year saves ₹34,529, and the saving grows as tariffs rise

The system pays for itself in about 2.8 years and leaves the household about ₹14,43,468 ahead over 25 years.

Frequently asked questions

Why does the 200-unit line matter so much in Telangana?

Telangana's domestic tariff is not purely telescopic. Up to 200 units a month the rates are ₹3.40 and ₹4.80; above 200, the whole consumption moves to a table starting at ₹5.10 and reaching ₹10 a unit. Solar that brings net use under 200 cuts the bill by more than the units it replaces.

Does Gruha Jyothi make solar pointless?

Only for eligible homes that already stay within 200 units a month, whose bill is already free. Most homes that are interested in solar use well above that and pay the full tariff, and the free allowance does not apply once a month goes over it.

How does net metering settle on TGSPDCL?

Net metering with surplus settled yearly at the TGERC-approved rate.

Sources

Related calculators

More in Energy, Solar & EV