Net Metering Concept:
HOW NET METERING WORKS:
Traditional Grid Connection:
Solar panels → Home use → Excess to grid (wasted/lost)
Problem: Excess generation has no value
Net Metering Connection:
Solar panels → Home use
↓ Excess to grid → Credited to bill
↓ Night/cloudy → Draw from grid → Pay normal rate
BENEFIT: Every unit of solar exported = ₹8-10 credit received
Maharashtra Net Metering Policy:
POLICY PARAMETERS:
1:1 ENERGY EXCHANGE RATIO:
– 1 unit of solar exported = 1 unit credited
– Credited at residential tariff rate (₹8-10/unit typical)
– No discounting or net loss
MONTHLY SETTLEMENT:
– Units generated: Tracked hourly
– Units consumed: Tracked separately
– Net = Generated – Consumed
– If net positive: Credit to next month’s bill
– If net negative: Pay for usage (normal)
TARIFF ADVANTAGE:
Residential rate: ₹8-10/unit (varies by city)
Export credit: Same as consumption rate (no reduction)
Result: Full value for exported electricity
BILLING PERIOD:
– Monthly meter reading
– Cumulative credits tracked
– Carryforward to next month possible
– Year-end settlement varies
Eligibility Criteria:
BASIC REQUIREMENTS:
✓ MSEDCL active electricity consumer
✓ Residential or small commercial tariff
✓ Grid-connected solar system (mandatory)
✓ System capacity typically 1-100 kW (residential: 1-10 kW typical)
✓ No existing net meter installation
✓ Proper electrical installation (ISI certified, safe)
CONSUMER TYPES ELIGIBLE:
Residential Individual:
✓ Any homeowner with solar system
✓ Single phase or three-phase connection
✓ Flat/bungalow/house all eligible
Group Housing / RWA:
✓ Apartment societies with common solar
✓ Group housing projects
✓ RWA (Resident Welfare Association)
✓ Systems up to 500 kWp eligible
Small Commercial:
✓ Offices with solar rooftop
✓ Shops/retail with solar
✓ Clinics/diagnostic centers
✓ Small manufacturing
NOT ELIGIBLE:
✗ Off-grid systems (no grid connection)
✗ Systems already on net meter (no duplicate)
✗ High-tension (HT) consumers (separate policy)
✗ Industrial consumers (typically different tariff)
TECHNICAL REQUIREMENTS:
✓ Inverter: Meets IS 16001 standards (Indian standard)
✓ Grid protection: Automatic disconnection during grid failure
✓ Wiring: ISI certified, proper earthing
✓ Inspection clearance: Municipal/MSEDCL approval
STEP 1: Verify Eligibility & Get MSEDCL Approval for Solar
Prerequisite:
– Your solar system must be approved by MSEDCL
– Get PMAY/subsidy approval first (if applicable)
– Or get system installed and ready
Then: Proceed to net metering application
STEP 2: Submit Net Metering Application
APPLICATION OPTIONS:
Option A: Online (Recommended)
– Visit: https://solar.mahadiscom.in/
– Login with MSEDCL consumer ID & password
– Fill net metering form
– Upload required documents
Option B: Offline
– Visit nearest MSEDCL office
– Get net metering form
– Fill & submit with documents
– Get receipt
DOCUMENTS REQUIRED:
– MSEDCL electricity bill (latest)
– Net metering application form (downloaded)
– System specification (from inverter/panel certificate)
– Single-line diagram (electrical drawing)
– Structural/load-bearing certificate
– Identity proof & address proof
– Property ownership proof
PROCESSING FEE:
– Online: ₹500-1,000 (varies by MSEDCL zone)
– Offline: Same
– (Sometimes waived for premium categories)
STEP 3: MSEDCL Technical Evaluation
MSEDCL ASSESSMENT (1-2 weeks):
OUTCOME:
✓ Approved: Proceed to net meter installation
✗ Rejected: Review reason, resubmit if fixable ? Request Info: Clarification needed (respond within 1 week)
TYPICAL APPROVAL: 1-2 weeks for straightforward cases
DELAYED: 2-4 weeks if additional verification needed
STEP 4: Net Meter Installation
MSEDCL ARRANGES INSTALLATION:
What Happens:
Your Preparation:
– Ensure electrical work completed
– Keep premises accessible
– Have solar system operational
– Bill payments current
– Be available during installation visit
INSTALLATION COST:
– MSEDCL typically covers cost (government-funded)
– No charge to consumer usually
– Some zones: ₹500-1,000 meter cost
INSTALLATION TIMELINE:
– Scheduled within 1-2 weeks of approval
– On-site time: 1-2 hours typical
– Can be same-day if meter available
STEP 5: Activation & Billing Begins
AFTER INSTALLATION:
System Status:
– Net meter now recording generation & consumption
– Solar system can export to grid
– Consumer account updated
BILLING CHANGES:
– Meter shows both ways of flow (generation & consumption)
– Monthly bill calculated as net energy
– Credits reflected automatically
FIRST BILL SHOWING NET METERING:
– Usually next billing cycle (4-6 weeks)
– Can take time for data collection
– Should show net value prominently
VERIFICATION:
– Check bill has net meter reading
– Confirm export credits shown
– Verify rates applied correctly
– Contact MSEDCL if issues
Sample Net Metering Bill Calculation:
EXAMPLE: 3 kW Residential System (Pune, MSEDCL tariff ₹8/unit)
MONTH: June (Summer, high generation)
GENERATION:
– Monthly generation (3 kW system): 450 units
– Daytime home use from solar: 200 units (direct)
– Excess exported to grid: 250 units
CONSUMPTION:
– Daytime use from solar: 200 units (free)
– Evening/night from grid: 150 units
– Total from grid: 150 units
NET CALCULATION:
– Units generated: 450
– Units to grid (excess): 250
– Units from grid: 150
– Net position: 250 – 150 = 100 units credit
BILLING:
– Fixed charges: ₹300
– Taxes (5%): ₹15
– Energy consumption: 0 (covered by solar)
– Energy credit: 100 units × ₹8 = ₹800 credit
– TOTAL BILL: ₹315 – ₹800 credit = NET CREDIT ₹485
RESULT: ₹485 CREDIT TO NEXT MONTH’S BILL!
Net Metering Benefits – Annual Analysis:
ANNUAL SCENARIO (Same 3 kW System):
GENERATION (Annual):
– Total generation: 5,400 units (60% capacity factor typical)
– Daytime consumption: 2,400 units (direct use, free)
– Excess exported: 3,000 units
CONSUMPTION (Annual):
– Daytime from solar: 2,400 units (free)
– Night/cloudy from grid: 1,800 units
– Total grid consumption: 1,800 units
BILLING:
Without net metering (if no credit):
– Annual grid consumption: 1,800 + 5,400 (lost excess) = 7,200 units
– Annual bill: 7,200 × ₹8 = ₹57,600
With net metering (1:1 credit):
– Grid consumption: 1,800 units = ₹14,400
– Export credit: 3,000 units = ₹24,000
– Net: ₹14,400 – ₹24,000 = ₹9,600 credit annually!
ANNUAL BENEFIT: ₹9,600 credit (nearly ₹800/month savings!) 25-YEAR
BENEFIT: ₹2,40,000+ just from net metering credits!
RESULT: Electricity bills practically ZERO (only fixed charges remain)
Scenario 1: Residential Home (3 kW)
Generation: 5,400 units/year (60% capacity factor)
Consumption: 4,200 units/year (typical Indian home)
Exported: 1,200 units/year (excess)
Annual Bill Reduction: ₹9,600 (100% coverage possible!) Monthly Average
Bill: ₹0-500 (only fixed charges)
Scenario 2: Office Building (20 kW)
Generation: 36,000 units/year (60% capacity)
Consumption (office): 24,000 units/year (mostly daytime)
Exported: 12,000 units/year
Annual Savings from Net Metering: ₹96,000
% Bill Reduction: 50-60% typical
Payback improvement: 1-2 years faster
Scenario 3: Housing Society Common Area (50 kW)
Generation: 90,000 units/year
Common area consumption: 30,000 units/year
Exported: 60,000 units/year
Annual Credit: ₹4,80,000
Maintenance charge reduction: ₹40,000/month average Spread across
residents: ₹80-100 per flat benefit!
Challenge 1: “Long Processing Time for Net Metering”
Problem:
– Application submitted 2+ months ago
– Still waiting for meter installation
– No clear timeline provided
Solutions:
Prevention:
– Apply immediately after solar approval
– Follow up after 2 weeks
– Keep all documentation ready
– Respond quickly to any MSEDCL queries
Challenge 2: “Bill Shows No Net Metering Credit”
Problem:
– Meter installed, but first bill doesn’t show credit
– Unsure if system working
Solutions:
– Solar system generation vs consumption
– Compare with inverter display data
Prevention:
– Confirm meter working on installation day
– Get installation completion certificate
– Keep early bills for reference
– Monitor system independently (app/inverter)
Challenge 3: “Net Metering Credit Not Utilized”
Problem:
– Large monthly credit builds up
– Worried about losing credit at year-end
Solutions (Varies by State Policy):
– Converted to cash (rare, ask MSEDCL)
– Carried forward indefinitely (some policies)
– Donated to charitable cause (occasional option)
3. Increase consumption (run AC more, etc.)
– Not practical or advisable
– Consider expansion if planning long-term
Best Approach:
– Design system to match average consumption (not exceed)
– Aim for net-zero annual balance
– Ask MSEDCL about credit policies upfront
Challenge 4: “Tariff Change Affects Net Metering Credit”
Problem:
– MSEDCL increased tariff mid-year
– Confused about how credit rate changes
How It Works:
– New tariff applies to new generation (prospective)
– Existing credits honored at old rate
– Can be favorable or unfavorable
Example:
– Old tariff: ₹8/unit (credits earned at this rate)
– New tariff: ₹9/unit (new generation credited at ₹9)
– Existing ₹5,000 credit: Used at ₹8/unit value
MSEDCL Typically: Honors old rate for accumulated credits
Success Story 1: Middle-Class Family – Pune
Profile: 3-BHK flat, 3 kW solar, June 2023 installation Monthly bill before
solar: ₹8,000 (summer peak)
With Net Metering (Year 1):
– June bill: ₹400 (fixed charge only, ₹7,600 credit)
– July bill: ₹300 (credit applied, minimal charge)
– August bill: ₹200 (monsoon, less generation)
– Average monthly bill: ₹200-500 (vs ₹8,000)
Annual Impact:
– Bills saved: ₹85,000 (vs ₹96,000/year pre-solar)
– System cost: ₹2.4 lakhs
– Subsidy: ₹80,000
– Net investment: ₹1.6 lakhs
– Payback: 1.9 years
Family Quote: “Net metering is incredible. Summer bills gone! We essentially have free electricity now.”
Success Story 2: Senior Citizen – Mumbai
Profile: Senior couple, 2 kW system, retired
Monthly bill before: ₹5,000 (fixed pension strain)
With Net Metering (Year 1):
– Average monthly: ₹100-200 (mostly fixed charges)
– Pension impact: Reduced from ₹5,000 to ₹150 monthly
– Savings: ₹4,850/month to senior budget
Annual Benefit:
– Yearly savings: ₹58,200
– System cost: ₹1.6 lakhs
– Subsidy received: ₹60,000
– Net investment: ₹1 lakh
– Payback: 1.7 years
Senior’s Quote: “Net metering gave us financial freedom in retirement. We didn’t think electricity could be this cheap at our age.”
Success Story 3: Small Business (Clinic) – Nashik
Profile: Clinic with 5 kW solar, daytime-only operation Monthly bill before: ₹6,000
With Net Metering:
– Daytime consumption: All from solar (no grid draw)
– Evening: Minimal (off-hours) = ₹200-300
– Excess exported: ₹3,000+ credit monthly
Annual Impact:
– Operating cost reduction: ₹60,000/year
– Professional status: ‘Green clinic’ improves brand
– Reinvested savings: New equipment, staff training
– System payback: 2.5 years
Clinic Owner Quote: “Net metering reduced operating costs significantly. Patients appreciate ‘green healthcare’ positioning. Worth every rupee!”
