SolarOA Dispatch Pro MERC Regulations (Maharashtra)

Indian Solar PV Load Scheduling & BTM Zero-Export DSM Deviation Simulator

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Consumer & Feeder ID

Contract Demand & Load

Demand
kVA
kW
15-Min Smart Meter Survey AMR / CSV

Upload AMR/DLMS 15-min interval CSV to replace synthetic profile with real-world plant meter survey data.

Solar Assets & Met Data

AI & SERC Optimal Capacity Sizing
Recommended Rooftop
500 kWp
0% Curtailment (Net Metering Cap)
Recommended OA Solar
2,250 kWp (2.25 MWp)
80% RE • Rule 3 Compliant (62% Offtake)
RE Share: 84.2% • Banked for Night: 4,280 kWh/day • Est. Savings: ₹14.8 L/yr
kWp
kWp
1. Rooftop Solar Site (BTM)
Type to search or Enter ↵
°N
°E
Opt: 19°
°
2. Open Access Solar Park (Remote)
Type to search or Enter ↵
°N
°E
PVGIS Satellite Radiation
Longitudinal Shift OA Lags by 8 min
Rooftop Insolation 5.74 kWh/m²
OA Park Insolation 6.64 kWh/m²
OA CUF Boost CUF: 22.0% (Fixed)

Policy, Tariffs & BESS

SERC
%
₹/kWh
₹/kWh
Maharashtra (MERC)

MERC restricts concurrent Net-Metering and Open Access on the same connection. Converting Rooftop Solar to BTM with Zero Export (using Class 0.2s RPR) enables full self-consumption while Captive Solar supplies the remaining demand with zero CSS.

Net Metering Limit: 1000 kW / 100%
DSM Tolerance Band: ±10.0% (SERC DSM)
Grid Delivery Loss: 4.10% (33 kV)
Industrial Tariff: ₹7.85/kWh
%
kWh
kW
ANALYZED PROJECT & CAPACITY Project Name & Capacity being analysed
Apex Precision Forgings & Alloys Ltd. • 1.50 MW OA Solar Captive Capacity
Contract Demand: 1,200 kW
BTM Rooftop: 500 kWp (0.50 MW)
MERC (Maharashtra)
Total Daily Load
22,850 kWh
Clean Energy Share: 68.4%
BTM Rooftop Solar
2,480 kWh
100% self-consumed (0 export)
OA Solar Delivered
7,140 kWh
PPA Rate: ₹3.80/kWh
Discom Grid Import
13,230 kWh
Base Tariff: ₹7.85/kWh
DSM Penalties
₹0
✅ 100% compliant within band
Daily Net Savings
₹48,390
36.2% reduction vs baseline
Load Multiplier: 100% (1000 kW)
Solar Irradiance: 100%
Stress Tests:

Load Dispatch Profile

Load
Rooftop Gen (PVGIS)
OA Solar (PVGIS)
Grid
Sched
Quick Stress-Test Scenarios Simulate live dispatch & export variations
Block #49 12:00 – 12:15
Load: 920 kW
BTM: 251.5 kW
OA: 833.0 kW
Grid: 0 kW (Sched: 0 kW)
Dev: 0.0 kW (0%)
DSM: ₹0
In-Band

15-Min SLDC Dispatch Schedule

Block
#		 Time
Interval		 Connected
Load (kW)		 Energy Dispatch Schedule Actual Grid
Withdrawal (kW)		 Deviation Dispatch
Status		 DSM
Penalty
By BTM Solar By OA Solar By Grid in kW %age

Solar Energy Banking & TOD Settlement Ledger

SERC Monthly Banking Settlement • 2.0% In-Kind Deduction • Offsets Non-Solar Grid Tariffs
MERC Regulatory Banking
Daytime Solar Surplus Injected
4,850 kWh/day
Gross Generation Delivered > Demand
In-Kind Banking Loss Deduction
-97 kWh (-2.0%)
Discom InSTS Transmission Retained
Net Banked Energy Credited
4,753 kWh/day
Credited in Discom Energy Ledger
Banked Energy Adjusted (Non-Solar)
4,753 kWh/day
Offsets Night Shift & Peak Grid Drawl
Net Billed Grid Import
8,477 kWh/day
Reduced from 13,230 kWh raw drawl
Avoided Tariff Savings via Banking
₹37,311 /day
₹11.19 Lakhs /month tariff offset
Night Off-Peak (22:00 - 06:00)
2,420 kWh Tariff: ₹6.67/kWh (Offset)
Morning Peak (09:00 - 12:00)
Direct Solar Absorbed Peak Tariff: ₹9.03/kWh
Evening Peak (18:00 - 22:00)
1,850 kWh Peak Tariff: ₹9.81/kWh (Offset)
Day Shift (06:00 - 09:00 & 12:00 - 18:00)
483 kWh Normal Tariff: ₹7.85/kWh (Offset)
Block 49/96 (12:00 - 12:15) Interactive 15-Minute Timeline Player
00:00 (Night Shift) 06:00 (Sunrise) 12:00 (Solar Peak) 18:00 (Sunset) 24:00 (Night Shift)
Factory Load 980 kW Connected Demand
BTM Solar (0-Export) 410 kW 100% self-consumed
OA Solar Absorbed 570 kW 570 kW delivered
Discom Grid Drawl 0 kW 0 kW scheduled
Schedule Deviation +0.0 kW (0%) Within Tolerance
✅ Balanced Dispatch: Within SERC allowable tolerance band. Zero penalty.
25-Year Project Finance, DSCR & Investor Bankability Model
Project IRR (Pre-Tax) 18.4% Benchmark: ≥ 14.0%
Equity IRR (Post-Tax) 22.8% Target Return on Capital
Minimum DSCR 1.32x Bank Covenant: ≥ 1.20x
Average DSCR 1.54x Bank Covenant: ≥ 1.35x
NPV @ 10% WACC ₹4.12 Cr Net Present Value
Solar LCOE ₹3.24/kWh Levelized Solar Cost
Discounted Payback 4.8 Yrs Simple: 3.6 Yrs
25-Yr Net Savings ₹16.85 Cr Net after O&M & Debt
25-Year Pro-Forma Cash Flow & Debt Service Schedule (INR Lakhs) Assumes 70:30 Debt-Equity • 12-Year Amortization @ 9.25% p.a. • 3% Tariff Escalation
Yr Clean Energy (MUs) Discom Tariff (₹) Gross Savings O&M Cost EBITDA Principal Interest Total Debt CFADS DSCR FCFE Cum. Savings
Open Access Landed Tariff Waterfall & Statutory Rule 3 Captive Audit
MERC MYT Tariff Order

Itemized Landed Cost Breakdown (₹/kWh)

Base Solar PPA Rate (Generator Bus):₹3.800
STU Transmission Charges:+₹0.440
Discom Wheeling Charges:+₹0.380
Wheeling & Transmission Losses (4.10%):+₹0.162
Cross-Subsidy Surcharge (CSS):₹0.000 (Exempt)
Additional Surcharge (AS):₹0.000 (Exempt)
Banking Energy Surcharge:+₹0.076
Electricity Duty & SLDC Operating Fees:+₹0.395
TOTAL OPEN ACCESS LANDED COST: ₹5.253 / kWh
Discom Effective Industrial Tariff:₹8.580 / kWh
NET TARIFF DIFFERENTIAL (SAVINGS): ₹3.327 / kWh (38.8%)

Statutory Captive Eligibility Audit (Rule 3)

✅ 100% RULE 3 COMPLIANT (CAPTIVE STATUS VALIDATED)
1. Equity Ownership Criterion (≥ 26%): PASS (26.0% Held)

Consumer holds minimum 26% equity share capital with voting rights in the generator SPV.

2. Energy Consumption Criterion (≥ 51%): PASS (74.4% Consumed)

Captive consumer consumes at least 51% of aggregate electricity generated on an annual basis.

Retrospective CSS / AS Risk:

Zero CSS / AS liability. 100% Captive statutory exemption validated under Electricity Rules 2005/2023.

BESS Battery Storage, Midday Curtailment Capture & TOD Peak Arbitrage
LFP Battery Storage
Configured BESS 500 kWh 250 kW (0.5C Inverter)
Curtailed Solar Captured 420 kWh/day Free midday solar stored
Peak TOD Energy Discharged 380 kWh/day Discharged during 18-22h peak
Annual TOD Arbitrage Savings ₹14.2 Lakhs/yr Offsets peak grid surcharges

Time-of-Day (TOD) Tariff Arbitrage Strategy

Under SERC industrial tariffs, electricity drawn during the evening peak window (18:00 – 22:00) incurs a 20% to 30% surcharge (up to ₹10.50 – ₹12.00/kWh). When BTM Rooftop Solar generation exceeds factory demand around midday (11:00 – 14:00), the Reverse Power Relay would otherwise curtail solar to enforce Zero-Export. The BESS intercepts this curtailed energy at zero marginal cost and discharges it during the evening peak, maximizing financial yield.

35,040-Block (8,760-Hour) Annual Simulation & Smart Meter Survey
365-Day Solar Atlas
Annual Clean Generation 3.52 MUs BTM + Delivered OA
Annual Green Power Share 68.4% Of total factory demand
Annual Solar CUF 20.8% Weighted Capacity Factor
Annual Energy Bill Savings ₹176.6 Lakhs Net savings per year

12-Month Seasonal Solar Yield & Energy Balance Table

Month Season Load (MUs) BTM Solar (MUs) OA Solar (MUs) Green Share (%) Grid Import (MUs) CUF (%) Savings (₹ Lakhs)
🌱 2,886 Tonnes Annual CO₂ Emissions Avoided CEA Grid Baseline: 0.82 tCO₂/MWh
🌳 129,870 Trees Equivalent Mature Trees Seeded Over 25-Year Operational Life
⚡ 68.4% RE100 Renewable Power Share Scope-2 Corporate Decarbonization