Structure: Introduction → Methodology → Findings → Discussion → Conclusions/Recommendations
Installation of Rooftop Solar Panels on Science Building
Prepared For: College Sustainability Committee, Govt Graduate College
Burewala
Date: 26 October 2025
Authors: Energy Management Task Force
1. Introduction
Objective: Assess viability of installing 50 kW solar panels on Daud
Science Block roof.
Driver: Reduce grid dependency and align with Green Punjab
Initiatives.
Scope: Technical, financial, and operational feasibility
over 5 years.
2. Methodology
Evaluation Criteria:
Factor | Weight | Threshold | Assessment Method |
---|---|---|---|
Financial (ROI) | 40% | ≥12% annual return | Cost-benefit analysis |
Technical Fit | 30% | No structural changes | Engineering survey |
Campus Impact | 20% | ≤2 weeks installation | Academic calendar review |
Maintenance | 10% | ≤5 hrs/month | Vendor service agreements |
Data Sources:
- Punjab
Energy Department solar maps
- Structural
audit report
- Vendor
quotations (SolarPak, SunraysEnergy)
3. Findings
Options Analysis (Written Summary)
Option A: Monocrystalline Panels
- Financial
(ROI): 14%
annual return (exceeds 12% threshold)
- Technical
Fit: Optimal
- No structural modifications required
- Installation
Time: 10
days (aligns with winter break)
- Maintenance: 3 hours/month
- Risk: Low hail resistance (mitigated
by insurance policy)
Option B: Thin-Film Panels
- Financial
(ROI): 9%
annual return (below 12% threshold)
- Technical
Fit: Partial
Reinforcement - Requires roof strengthening
- Installation
Time: 14
days
- Maintenance: 2 hours/month
- Risk: High degradation rate (1.5%/year
reduces long-term efficiency)
Option C: Building-Integrated PV (BIPV)
- Financial
(ROI): 6%
annual return (below 12% threshold)
- Technical
Fit: Major
Retrofit - Full roof reconstruction needed
- Installation
Time: 6
weeks (disrupts academic activities)
- Maintenance: 1 hour/month
- Risk: Complex repairs requiring
specialized technicians
Key Comparisons
Criterion | Option A | Option B | Option C |
---|---|---|---|
Viability Score | 92/100 | 68/100 | 54/100 |
College Impact | Low disruption | Moderate disruption | High disruption |
5-Year Value | ₨1.26 crore profit | ₨42 lakh profit | ₨18 lakh profit |
Technical Fit Details
- Option
A: Roof
load capacity (35 kg/m²) supports panels (28 kg/m² required)
- Option
B: Requires
+15% steel reinforcement (₨4.2 lakh additional cost)
- Option
C: Full
roof demolition needed (6-week closure of Science Building)
“Option A delivers Punjab's best
cost/kW ratio (₨6.16 lakh) while Option C's aesthetic benefits don't offset its
300% longer payback period.”
Financial Analysis (Option A)
Item | Cost (₨) |
---|---|
Installation | 3,08,00,000 |
Punjab Govt. Subsidy | -1,23,20,000 (40%) |
Net Cost | 1,84,80,000 |
Annual Savings | 50,40,000 |
Payback Period | 3.7 years* |
4. Discussion
Key Advantages:
- Exceeds
ROI threshold (14% > 12%) with fastest payback period
- Roof
load capacity (35 kg/m²) supports panels without reinforcement
- Winter
break installation avoids academic disruption
Critical Risks:
- Monsoon
Output Drop: 15-20%
June-August (solved by grid hybridization)
- Hail
Damage: 5%
annual probability (₨8,40,000 insurance recommended)
- Regulatory
Delays: MEPCO
approvals take 30-45 days
Punjab Colleges Benchmark:
Metric | GGC Burewala | Avg. Punjab Colleges |
---|---|---|
Cost/kW | ₨6,16,000 | ₨6,72,000 |
Daily Output | 210 kWh | 185 kWh |
5. Conclusions & Recommendations
Verdict: Feasible (Score: 92/100)
Recommendations:
1. Approve Option A
(Monocrystalline) - meets all technical/financial thresholds
2. Claim Punjab Solar Scheme subsidy
before March 2026 deadline
3. Allocate ₨ 8,40,000 annually for hail
insurance
Implementation Timeline:
Phase | Timeline | Budget (₨) |
---|---|---|
Permits/Approvals | Nov-Dec 2025 | 2,80,000 |
Panel Installation | 5-15 Jan 2026 | 1,82,00,000 |
Grid Integration | 1 Feb 2026 | 24,00,000 |
Success Metrics:
- ≥200
kWh daily generation (non-monsoon)
- 25%
reduction in Science Building's grid dependence
- ₨4,20,000
monthly savings
Attachments:
- Structural
integrity certificate
- SolarPak
quotation (Ref: SP/Q/1526)
- Punjab
Solar Scheme guidelines
"This project transforms our Daud science block into a clean energy hub – paying for itself in under 4 years while reducing carbon emissions equivalent to removing 42 cars from Burewala roads annually."
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