PHASE 1: HISTORICAL ANALYSIS (Week 1)
– Review 12-24 months of electricity bills
– Identify consumption patterns & trends
– Spot seasonal variations
– Calculate average monthly cost
– Analyze cost per unit variations
PHASE 2: ON-SITE INSPECTION (Week 2)
– Walk-through entire facility
– Inventory all energy-consuming equipment
– Assess condition & age of equipment
– Check insulation, air leaks, etc.
– Photograph major systems
PHASE 3: LOAD MEASUREMENT (Week 2-3)
– Install temporary power analyzers
– Measure equipment draw (peak, average)
– Profile consumption patterns
– Identify peak demand times
– Document load profiles
PHASE 4: ANALYSIS & MODELING (Week 3-4)
– Calculate energy losses
– Model potential interventions
– Project financial impact (ROI, payback)
– Prioritize recommendations
– Create implementation roadmap
PHASE 5: REPORTING & RECOMMENDATIONS (Week 4-5)
– Comprehensive audit report prepared
– Detailed cost-benefit analysis
– Implementation timeline proposed
– Financing options outlined
– Follow-up strategy discussed
STEP 1: Initial Consultation (Day 1)
INFORMATION GATHERING:
About Your Facility:
– Building type (residential/commercial/industrial)
– Age & construction type
– Square footage/area
– Number of occupants/employees
– Operating hours
– Climate zone
Current Energy Usage:
– Average monthly bill
– Peak month & lowest month
– Energy (kWh) vs demand charges
– Any recent increases?
– Billing history available?
Goals & Constraints:
– Desired savings target
– Budget constraints
– Timeline for implementation
– Any equipment off-limits?
– Future expansion plans?
DELIVERABLE:
– Audit proposal & timeline
– Expected cost & scope
– Preliminary assessment
– Questions for auditor
YOUR PREPARATION:
– Provide 12-24 months bills
– List major appliances/systems
– Note any known issues
– Clarify access/timing
STEP 2: Historical Bill Analysis
DETAILED BILL REVIEW:
Monthly Pattern Analysis:
– Create 12-month consumption graph
– Identify peaks & troughs
– Seasonal variations noted
– Compare month-to-month (growth/decline)
– Look for anomalies
Cost Analysis:
– Fixed charges extracted
– Variable charges calculated
– Cost per unit (₹/kWh)
– Demand charges (if applicable)
– Tariff structure understanding
Baseline Establishment:
– Average consumption: kWh/month
– Average cost: ₹/month
– Peak usage: kWh (highest month)
– Off-peak usage: kWh (lowest month)
– Seasonal factor: Peak/Off-peak ratio
Trend Analysis:
– YoY growth rate
– Consumption growth vs inflation
– Cost growth vs consumption
– Anomalies explained
– Predictions for next 12 months
FINDINGS DOCUMENTED:
– 12-month consumption baseline
– Cost analysis by category (if available)
– Seasonal patterns
– Anomalies & questions
– Areas for investigation
STEP 3: On-Site Inspection (4-8 hours typical)
FACILITY WALKTHROUGH:
Exterior Assessment:
– Building envelope condition
– Windows/doors condition & sealing
– Roof condition (reflectivity, insulation)
– Wall insulation assessment
– Air leak spots identified
Lighting Systems:
– Lamp type (LED, fluorescent, incandescent)
– Fixture condition
– Placement & coverage
– Usage patterns (automatic switch, manual)
– Operating hours
HVAC Systems:
– Age & efficiency rating
– Maintenance condition
– Thermostat type & settings
– Ductwork condition & sealing
– Filter conditions
– Heat/cool scheduling
Water Heating:
– Water heater type & age
– Temperature setting
– Insulation on pipes
– Hot water usage patterns
– Efficiency rating
Appliances & Equipment:
– Refrigeration (age, efficiency)
– Cooking equipment (gas/electric)
– Office/IT equipment
– Industrial equipment (if applicable)
– Standby power draw (phantom load)
Electrical Systems:
– Main electrical panel condition
– Wiring assessment
– Distribution losses
– Grounding & safety
– Power factor (if commercial)
DOCUMENTATION:
– Photographs of major equipment
– Serial numbers & specifications
– Condition notes
– Energy label information (if present)
– Age assessment
STEP 4: Load Profiling & Measurement (1-2 weeks)
MEASUREMENT SETUP:
Power Quality Analyzer Installation:
– Temporary installation (non-invasive)
– Measures: Voltage, current, power, harmonics
– Frequency: Every 15-60 minutes
– Duration: 7-14 days minimum
– Multiple locations possible (multi-circuit analysis)
DATA COLLECTION:
– Weekday vs weekend patterns
– Peak vs off-peak hours
– Seasonal variations (if measured long-term)
– Equipment-specific load profiling
– Problem identification
MEASURED PARAMETERS:
– Real power (kW): Actual energy consumed
– Apparent power (kVA): Total capacity needed
– Reactive power (kVAR): Inefficient component
– Power factor: Efficiency ratio (target: 0.95+)
– Harmonics: Power quality issues
– Voltage variations: Over/under-voltage events
FINDINGS FROM MEASUREMENT:
– Peak demand hour: When highest usage occurs
– Peak load: Maximum power needed
– Average load: Typical consumption
– Load factor: Average/Peak ratio
– Load profile shape: Usage pattern through day
EXAMPLE FINDINGS:
“Morning peak: 8-9 AM (50 kW load from office startup)
Midday: 35 kW average (steady operation)
Evening peak: 5-7 PM (50 kW, occupants returning)
Night: 15 kW (HVAC + emergency lighting)
Weekends: 10 kW average (maintenance systems)”
STEP 5: Detailed Analysis & Modeling
ENERGY LOSS IDENTIFICATION:
Calculate Energy Losses (by category):
LIGHTING LOSSES:
Current: 500 fluorescent fixtures @ 40W average
Daily use: 12 hours
Daily consumption: 500 × 40W × 12h = 240 kWh
With LED conversion (10W): 50 kWh
Daily savings: 190 kWh </span
Annual savings: 69,350 kWh = ₹5,55,000/year
HVAC LOSSES:
Current: Central AC, 20-year-old, 3-ton capacity
Estimated efficiency: 2.5 SEER (poor)
Seasonal usage: 200 days/year, 10 hours/day
Daily consumption: 3 tons × 0.5 kW/ton = 1.5 kW continuous
Annual HVAC: 1.5 kW × 10h × 200 days = 3,000 kWh
With modern AC (5.5 SEER): 1,364 kWh
Annual savings: 1,636 kWh = ₹13,090/year
WATER HEATING LOSSES:
Current: Electric water heater, no insulation
Daily hot water: 200 liters
Temperature rise: 40°C
Daily energy: 200L × 40°C × 1.16 Wh/L°C = 9.3 kWh
With solar heating (75% offset): 2.3 kWh needed
Annual electric: 2.3 kWh × 365 = 840 kWh
Current annual: 9.3 kWh × 365 = 3,395 kWh
Annual savings: 2,555 kWh = ₹20,440/year
PHANTOM LOAD (Standby):
Measured: 5 kW standby load continuously
Annual: 5 kW × 24h × 365 days = 43,800 kWh
With power management: 0.5 kW standby
Annual: 4,380 kWh
Savings: 39,420 kWh = ₹3,15,360/year
OTHER INEFFICIENCIES:
Assessed but minor
TOTAL IDENTIFIED SAVINGS:
– Lighting: ₹5,55,000
– HVAC: ₹13,090
– Water heating: ₹20,440
– Phantom loads: ₹3,15,360
– Total: ₹9,03,890/year!
ANNUAL CONSUMPTION BASELINE: 1,200,000 kWh
IDENTIFIED SAVINGS: 113,361 kWh (9.4% of total)
STEP 6: Prioritized Recommendations
RECOMMENDATION RANKING (By ROI):
PRIORITY 1: QUICK WINS (Payback <1 year)
Phantom Load Elimination
– Install smart power strips
– Enable power management
– Cost: ₹50,000
– Annual savings: ₹3,15,360
– Payback: 1.9 weeks (incredible!) – ROI: 531%
Lighting Conversion to LED
– Replace 500 fluorescent with LED
– Cost: ₹2,50,000 (500 fixtures × ₹500)
– Annual savings: ₹5,55,000
– Payback: 5.4 months
– ROI: 122%
HVAC Thermostat Optimization
– Install smart thermostat
– Optimize setpoints
– Cost: ₹25,000
– Annual savings: ₹35,000 (partial from optimization)
– Payback: 8.6 months
– ROI: 40%
PRIORITY 2: MEDIUM TERM (1-3 year payback)
HVAC System Upgrade
– Replace 20-year-old AC with modern 5.5 SEER
– Cost: ₹4,00,000
– Annual savings: ₹13,090 (from efficiency)
– Payback: 30.5 years (not good!)
– BUT: Combine with better controls → 50,000/year saving
– New payback: 8 years (acceptable)
– ROI: 12.5% IRR
Water Heating Optimization
– Install solar water heater (₹2,00,000 investment)
– Annual savings: ₹20,440
– Payback: 9.8 years (marginal)
– Combine with solar PV (same roof) → Synergy
– ROI: Improves with other solar
PRIORITY 3: LONG-TERM (3-5 year payback)
Solar PV Installation (25 kW)
– Cost: ₹18,00,000 (pre-subsidy)
– Subsidy: ₹6,00,000
– Net cost: ₹12,00,000
– Annual generation: 36,000 kWh
– Annual savings: ₹2,88,000 (@ ₹8/unit)
– Payback: 4.2 years (government subsidy needed)
– ROI: 24% annual (excellent)
IMPLEMENTATION ROADMAP:
Year 1 (Quick Wins):
– Month 1-2: Power management & LED retrofit
– Month 3: Smart thermostat
– Investment: ₹3,25,000
– Year 1 savings: ₹9,05,360
– Year 1 return: 179% ROI
Year 2-3 (Solar PV):
– Month 13-18: Solar system development
– Month 19-20: Installation & commissioning
– Investment: ₹12,00,000
– Combined Year 2-3 benefit: ₹5,93,360
– 3-Year Total Investment: ₹15,25,000
– 3-Year Total Savings: ₹19,04,080
– 3-Year ROI: 25%
– Payback: 2.4 years (accounting for all investments)
Residential Audit Findings (5,000 sq ft home):
TYPICAL ISSUES IDENTIFIED:
– Lighting Inefficiency (25-30% of bill)
– Problem: Incandescent/CFL bulbs throughout
– Opportunity: LED conversion (80% reduction)
– Cost: ₹15,000 (200 fixtures)
– Savings: ₹30,000/year
– Payback: 6 months
HVAC Issues (40-50% of bill)
– Problem: 15-20 year old AC system
– Opportunity: Modern AC + optimization
– Cost: ₹2,50,000
– Savings: ₹40,000/year
– Payback: 6.25 years
Water Heating (15-20% of bill)
– Problem: Electric heater, no insulation
– Opportunity: Solar + efficient heater
– Cost: ₹2,00,000
– Savings: ₹20,000/year
– Payback: 10 years
Envelope Leaks (5-10% of bill)
– Problem: Air leaks, poor insulation
– Opportunity: Sealing + weatherstripping
– Cost: ₹50,000
– Savings: ₹15,000/year
– Payback: 3.3 years
Phantom Loads (5-8% of bill)
– Problem: Always-on devices, standby power
– Opportunity: Smart power management
– Cost: ₹10,000
– Savings: ₹10,000/year
– Payback: 1 year
TOTAL OPPORTUNITY: ₹1,15,000/year (from ₹1,50,000/year baseline)
Investment Needed: ₹5,25,000
Payback: 4.6 years average
Annual ROI: 22%
Commercial Building Findings (50,000 sq ft office):
TYPICAL ISSUES IDENTIFIED:
Lighting (30-40% of bill)
– 5,000 fluorescent fixtures @ 40W
– LED retrofit: 10W fixtures
– Cost: ₹15,00,000 (500 per fixture)
– Annual savings: ₹75,00,000
– Payback: 2.4 months (incredible!) – ROI: 500%
HVAC (35-45% of bill)
– Central plant aging
– Recommissioning + optimization
– Cost: ₹50,00,000
– Annual savings: ₹40,00,000 – Payback: 1.25 years
– ROI: 80%
Plug Loads / Equipment (10-15%)
– Office equipment running 24/7
– Power management system
– Cost: ₹50,00,000
– Annual savings: ₹30,00,000
– Payback: 2 years
– ROI: 60%
Window/Envelope (5-10%)
– Single-pane windows
– Retrofitting feasible
– Cost: ₹1,50,00,000 (significant)
– Annual savings: ₹30,00,000
– Payback: 5 years
– ROI: 20%
Solar PV (Long-term)
– Rooftop space: 40,000 sq ft available
– System: 100 kW capacity
– Cost: ₹60,00,000 (pre-subsidy)
– Subsidy: ₹20,00,000
– Net: ₹40,00,000
– Annual generation: 1,40,000 kWh
– Annual savings: ₹1,12,00,000
– Payback: 3.6 years
– ROI: 28%
TOTAL OPPORTUNITY (All measures): ₹2,87,00,000/year! If implemented systematically over 5 years
Total 5-year benefit: ₹12,50,00,000
Total 5-year investment: ₹2,10,00,000
5-Year ROI: 495% (over 5 years of benefits)
Pre-Solar Audit (Recommended Approach):
TIMING: Conduct BEFORE solar installation
PURPOSE:
BENEFITS:
– Solar system 30-40% smaller (₹30-50 lakhs savings)
– Lower upfront solar investment
– Better ROI on smaller system
– Environmental impact higher (same generation from less equipment)
– Example: 10 kW system instead of 15 kW needed
PROCESS:
TIMELINE:
– Month 1-3: Audit & quick wins (payback within months)
– Month 4-9: Medium investments
– Month 10-12: Solar system implementation
– Year 2+: Long-term improvements continued
RESULT:
– Comprehensive energy strategy
– Layered implementation
– Maximum financial returns
– Sustainable long-term approach
Post-Solar Audit (Optimization Focus):
TIMING: Conduct AFTER solar operational (3-6 months)
PURPOSE:
BENEFITS:
– Baseline consumption data available (actual vs projected)
– Solar generation profile understood
– Time-of-use optimization possible
– Battery integration planning informed
– Demand management optimized
RECOMMENDATIONS FOCUS:
– Shift loads to peak solar hours (AC, water heating)
– Reduce peak demand (lower DISCOM charges)
– Load balancing for inverter efficiency
– Battery storage integration planning
– EV charging during solar peak hours
EXAMPLE OPTIMIZATION:
Current: AC runs 10 AM-6 PM (mixed solar/grid)
Optimized: AC ramps up 11 AM-1 PM (peak solar), reduced 2-6 PM
Result: More solar directly used, less expensive evening usage
ADDITIONAL AUDIT BENEFIT:
– Identify solar expansion opportunities
– Plan battery integration
– Optimize EV charging timing
– Complete decarbonization roadmap
Audit Pricing:
RESIDENTIAL AUDIT:
– Scope: 1,000-5,000 sq ft home
– Duration: 3-4 weeks
– Cost: ₹10,000-15,000
– Value of findings: ₹1,00,000+ typically
– ROI: 667-1000%
– Payback: 1-2 weeks (from quick wins alone)
SMALL COMMERCIAL AUDIT:
– Scope: 5,000-25,000 sq ft
– Duration: 4-6 weeks
– Cost: ₹25,000-50,000
– Value of findings: ₹10,00,000-20,00,000 typically
– ROI: 2000-4000%
– Payback: 3-10 days (from quick wins alone)
LARGE COMMERCIAL AUDIT:
– Scope: 25,000-100,000 sq ft
– Duration: 6-8 weeks
– Cost: ₹75,000-1,50,000
– Value of findings: ₹50,00,000-100,00,000 typically
– ROI: 3300-13,300%
– Payback: 2-5 days (from quick wins)
INDUSTRIAL AUDIT:
– Scope: Complex industrial facility
– Duration: 8-12 weeks
– Cost: ₹1,50,000-3,00,000
– Value of findings: ₹1,00,00,000+ typically
– ROI: 3300%+
– Payback: <1 day (from quick wins)
AUDIT COST COVERED BY SAVINGS:
Quick wins (lighting, phantom load): ₹50,000-100,000 savings
These savings recover audit cost within 1-2 weeks!
Remaining improvements = pure additional benefit
5-Year ROI Projection:
EXAMPLE: 5,000 sq ft Home
Year 1:
– Audit cost: ₹12,500
– Quick wins investment: ₹2,50,000
– Total: ₹2,62,500
– Savings: ₹1,15,000 (from quick wins, conservative)
– Net: +₹1,15,000 – ₹2,62,500 = –₹1,47,500 (investment phase)
Year 2-5:
– Annual savings: ₹1,50,000 (quick wins + medium-term)
– 4 years: 4 × ₹1,50,000 = ₹6,00,000
5-YEAR TOTAL:
– Investment: ₹2,62,500
– Savings: ₹7,15,000 (Year 1 + Years 2-5)
– Net benefit: ₹4,52,500
– 5-Year ROI: 172%
– Annual ROI: 34%
COMMERCIAL BUILDING (50,000 sq ft):
Year 1:
– Audit: ₹50,000
– Quick wins (Lighting + power management): ₹20,00,000
– Total: ₹20,50,000
– Savings: ₹1,05,00,000 (Year 1)
– Net: +₹84,50,000 profit in Year 1 alone!
Years 2-5:
– Additional medium-term improvements: ₹50,00,000
– Annual savings: ₹1,50,00,000
– 4 years: ₹6,00,00,000
5-YEAR TOTAL:
– Investment: ₹70,50,000 total
– Savings: ₹7,05,00,000
– Net benefit: ₹6,34,50,000
– 5-Year ROI: 900%
– Payback: 2 months (extraordinary!)
Standard Report Contents:
EXECUTIVE SUMMARY (2-3 pages):
– Current energy consumption
– Total identified savings opportunity
– Annual cost reduction potential
– Payback period (average)
– Recommended next steps
– Key findings highlights
DETAILED FINDINGS (5-10 pages):
– Billing analysis & trends
– On-site inspection findings
– Equipment condition assessment
– Load profiling results
– Identified inefficiencies (ranked by ROI)
– Explanation of findings (non-technical language)
FINANCIAL ANALYSIS (5-8 pages):
– Cost of each recommendation
– Savings per recommendation
– Payback period (individual)
– ROI (individual)
– Implementation timeline
– Financing options
IMPLEMENTATION ROADMAP (3-5 pages):
– Recommended sequence
– Timeline for each project
– Estimated costs & savings
– Quick wins first (build momentum)
– Long-term investments
– Phased approach options
COMPARISON SCENARIOS (2-3 pages):
– Do nothing scenario (cost projections)
– Partial implementation (conservative approach)
– Full implementation (maximum savings)
– Hybrid approaches (balanced)
APPENDICES:
– Detailed equipment specifications
– Measurement data graphs
– Bill analysis charts
– Vendor quotes (if obtained)
– Technical calculations
– Recommended contractor list
VISUAL PRESENTATIONS:
– Before/After comparison chart
– Savings breakdown pie chart
– ROI ranking bar chart
– Timeline Gantt chart
– 10-year cash flow projection
Sample Report Visualization:
CURRENT ENERGY BILL BREAKDOWN:
├─ Lighting: 30% (₹45,000/month)
├─ HVAC: 45% (₹67,500/month)
├─ Water heating: 10% (₹15,000/month)
├─ Equipment/Plug loads: 10% (₹15,000/month)
├─ Other: 5% (₹7,500/month)
└─ TOTAL: ₹1,50,000/month
IDENTIFIED SAVINGS OPPORTUNITY:
├─ Lighting retrofit: 75% reduction = ₹33,750/month
├─ HVAC optimization: 40% reduction = ₹27,000/month
├─ Water heating: 50% reduction = ₹7,500/month
├─ Power management: 80% reduction = ₹12,000/month
└─ TOTAL OPPORTUNITY: ₹80,250/month = ₹96.3 lakhs/year!
Current Annual Bill: ₹18,00,000
After All Improvements: ₹9,63,000
Annual Savings: ₹9,37,000 (52% reduction!)
