Step 1 of 5
New Plant Configuration
Define capacity and number of new solar plants under Phase 2.
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Plant Specifications
Auto: Capacity × Plants
Torrent Power / UGVCL Ahmedabad
Default 0% — edit to model growth
Total new capacity
—
kW
Unit rate
₹8
per kWh
Tariff escalation
0%
per year
Step 2 of 5
Annual Generation — Season-wise
Auto-calculated from verified Ahmedabad data (PR 82%). Override any season or the total directly.
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Season-wise Breakdown (all new plants)Spring
——
Summer
——
Monsoon
——
Autumn
——
Winter
——
| Season | Period | Days | kWh/day/kW | Units (editable) | % Share | Value (₹) |
|---|---|---|---|---|---|---|
| Spring | Feb–Apr | 89 | 7.47 | — | — | |
| Summer | May–Jun | 61 | 5.50 | — | — | |
| Monsoon | Jul–Sep | 92 | 3.50 | — | — | |
| Autumn | Oct–Nov | 61 | 5.06 | — | — | |
| Winter | Dec–Jan | 62 | 4.94 | — | — |
Total Annual Units (editable)
auto-filled
Annual Savings Value—
Best season
Spring
—
Weakest season
Monsoon
—
Daily average
—
units/day
Step 3 of 5
Project Cost & Investment
Enter all cost heads. Net Investment is directly editable.
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Plant Installation Cost
Cost × Plants
PM Surya Ghar / Other
⚠️ Existing 4.2 kW plants already installed — additional subsidy may not apply. Set to ₹0 by default.
Auto: Total Cost − Subsidy. Override freely for negotiated contract price.
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Structure Development CostMounting structure for panels — iron / GI pillars, channels, clamps, anchor bolts, and civil work. Applied across all new plants.
Structure Materials
Galvanised iron pillars, purlins, rafters
Module clamps, end clamps, fastener kits
Civil & Labour
Concrete base, anchor, waterproofing
Skilled labour for structure erection
Structure subtotal—
ℹ️ Structure cost is added to Net Investment for accurate breakeven calculation.
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Solar Panel Cleaning SetupAhmedabad's dry climate requires cleaning every 15–20 days in summer. Applied across both plants.
Tank, pipes, brush kit
Labour + materials per year
Setup + (Annual × 25)
ℹ️ Setup cost added to upfront investment. Annual cleaning reduces effective annual savings.
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Total Investment SummaryPlant installation cost—
Structure development—
Cleaning setup (one-time)—
Less: Subsidy—
Grand Total Net Investment
—
Net Investment field above is overridden if you type into it manually. Grand Total here reflects all cost heads combined.
Plant cost
—
before subsidy
Structure + cleaning
—
one-time
Net investment
—
all-in
Step 4 of 5
Existing Meters — Lift A & Lift B
Bi-monthly bill is already after existing 4.2 kW solar offset — enter exactly as shown on your UGVCL invoice.
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Meter Bills & New Plant Savings Lift A Meter: 74503295292
Yearly Bill (×6)—
New Plants Savings/yr—
After New Plants (yr)—
New Bi-monthly Bill—
📋 Show Actual Readings
Lift B Meter: 74503295306
Yearly Bill (×6)—
New Plants Savings/yr—
After New Plants (yr)—
New Bi-monthly Bill—
📋 Show Actual Readings
Total Combined Annual Bills—
Total Annual Savings (new plants)—
Step 5 of 5
ROI & Breakeven Analysis
Full financial picture — when your investment pays back and long-term value.
Investment Breakeven Period
—
Complete all steps above to see your result
Net Investment
—
Annual Savings
—
Monthly Savings
—
Year 5 cumulative
—
with tariff rise
Year 10 cumulative
—
with tariff rise
25-yr lifetime
—
estimated total
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Bill Impact SummaryLift A
Current Bi-monthly
—
Current Yearly
—
New Savings/yr
—
New Bi-monthly
—
Lift B
Current Bi-monthly
—
Current Yearly
—
New Savings/yr
—
New Bi-monthly
—
Combined
Current Bi-monthly
—
Current Yearly
—
Total Savings/yr
—
New Bi-monthly
—
| Meter | Current Bi-monthly | Current Yearly | New Savings/yr | Effective Yearly | New Bi-monthly |
|---|---|---|---|---|---|
| Lift A | — | — | — | — | — |
| Lift B | — | — | — | — | — |
| Combined | — | — | — | — | — |
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Year-by-Year Breakeven ProgressAnnexure A
Reference Data & Assumptions
All values editable. Changes cascade live through all calculations.
Ahmedabad Seasonal Solar Reference
NASA POWER API · Lat 23.02°N, Lon 72.57°E · Tap to expand
▼
Verified against actual Lift A meter: 4.2 kW → ~1,051 u/bi-month = 125 u/kW/month. New plants at PR 82% yield ~132 u/kW/month. Summer 5.50 (quality inverters handle heat). Monsoon 3.50 (Gujarat cloud breaks). Industry: 120–150 u/kW/month for Ahmedabad.
| Season | Months | kWh/day/kW | Days | Units/kW |
|---|---|---|---|---|
| Spring | Feb–Apr | — | ||
| Summer | May–Jun | — | ||
| Monsoon | Jul–Sep | — | ||
| Autumn | Oct–Nov | — | ||
| Winter | Dec–Jan | — |
82% for good-quality panels
Mono PERC: 0.5%/yr
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Actual UGVCL Invoice SummaryLift A — Meter 74503295292
📋 View Full Invoice
Avg bi-monthly
₹28,822
Avg solar gen
1,051 u
Lift B — Meter 74503295306
📋 View Full Invoice
Avg bi-monthly
₹22,289
Avg solar gen
964 u