Karnataka has one of India’s most active rooftop solar markets, yet BESCOM net metering applications still face a rejection rate above 30 percent at the first submission — driven almost entirely by drawing format non-compliance and missing portal documentation. For an EPC managing ten or twenty Karnataka projects simultaneously, that translates directly into delayed commissionings, deferred invoices, and consumer dissatisfaction.
This guide gives solar EPCs operating in the BESCOM jurisdiction a complete, field-verified playbook: every drawing format BESCOM expects, the Suvega portal application workflow, all five approval stages with realistic timelines, and the ten rejection reasons that account for the majority of re-submissions across BESCOM’s sub-division offices.
Direct answer. BESCOM solar net metering requires five mandatory drawing types — SLD in BESCOM format, Site Layout with shadow analysis, Earthing and Lightning Protection diagram, Net Meter Connection schematic, and a Structural Load Certificate — submitted through BESCOM’s Suvega/DGMS online portal, backed by physical documents at the sub-division office. Processing takes 30–60 days for systems up to 10 kW and 45–90 days for 10 kW to 500 kW under KERC Net Metering Regulations 2016 (amended 2023). ALMM modules and MNRE-approved inverters are mandatory for all post-January-2023 applications.
What BESCOM Is — and the KERC Regulatory Framework
BESCOM — Bangalore Electricity Supply Company Limited — is the distribution utility serving Bangalore Urban, Bangalore Rural, Chikkaballapur, Kolar, Tumkur, Ramanagara, and Davanagere districts of Karnataka. It is Karnataka’s largest DISCOM by consumer base and the most significant utility for rooftop solar in the state.
Net metering regulation in Karnataka sits with KERC — Karnataka Electricity Regulatory Commission — which governs all five Karnataka DISCOMs (BESCOM, MESCOM, HESCOM, GESCOM, CESC). The operative regulation is KERC Net Metering Regulations 2016, amended in 2023 to extend the capacity ceiling and introduce the Suvega/DGMS portal mandate for applications.
For a state-by-state comparison of net metering processes and DISCOM frameworks, see the DISCOM net metering process across India. For state-specific guides from neighbouring states, see TANGEDCO Solar Net Metering Guide (Tamil Nadu) and MSEDCL Solar Net Metering Guide (Maharashtra).
Key distinction. BESCOM is unique among South Indian DISCOMs in running a semi-digital application process — the Suvega portal handles application submission and tracking, while physical drawings and documents must still be submitted at the sub-division office. An EPC that only submits online without the physical file, or only files physically without the portal entry, gets rejected at Stage 1.
BESCOM Jurisdiction and Sub-Division Structure
| District / Area | BESCOM Division / Sub-Division |
|---|---|
| Bangalore Urban (all areas) | O&M divisions 1 through 8; sub-divisions per ward cluster |
| Bangalore Rural | Nelamangala, Doddaballapur, Hoskote sub-divisions |
| Tumkur district | Tumkur, Tiptur, Sira sub-divisions |
| Kolar district | Kolar, KGF, Malur sub-divisions |
| Chikkaballapur district | Chikkaballapur, Gowribidanur sub-divisions |
| Ramanagara district | Ramanagara, Channapatna sub-divisions |
| Davanagere district | Davanagere, Harihara sub-divisions |
Eligibility — Consumer Categories and System Size Limits
KERC Net Metering Regulations 2016 (as amended 2023) define eligibility by tariff category and sanctioned load. The table below applies to BESCOM consumers for systems installed from 2023 onward.
| Consumer Category | BESCOM Tariff Code | Max System Size | Export Tariff (₹/kWh) |
|---|---|---|---|
| Domestic LT (single phase) | LT-2(a) | Up to 10 kW | ₹3.27 (KERC 2024 order) |
| Domestic LT (three phase) | LT-2(b) | Up to 75 kW | ₹3.27 |
| Commercial LT | LT-3 / LT-4 | Up to 150 kW | ₹3.27 |
| Industrial LT | LT-5 | Up to 150 kW | ₹3.27 |
| Agricultural pump (metered) | LT-7 | Up to 5 kW | ₹3.27 |
| HT Industrial / Commercial | HT-1 / HT-2 | Up to 500 kW | ₹3.81 |
| Government / Institutions | LT-6 / HT-3 | Up to 500 kW | ₹3.27 |
Field tip. KERC's export tariff is set at the average power purchase cost (APPC), revised annually. The ₹3.27–₹3.81/kWh range shown above reflects the KERC order for FY2024–25. Confirm the current rate with BESCOM before presenting payback projections to your client — the rate can shift ±15% year on year.
The BESCOM Drawing Protocol — 5 Mandatory Formats
This proprietary framework defines the five drawing types that BESCOM’s sub-division drawing review officer checks before accepting an application for technical processing. Every drawing must be signed and stamped by a licensed electrical contractor holding a BESCOM/KPTCL contractor licence.
Single Line Diagram — BESCOM Format
Must show PV array → DC combiner (if applicable) → solar inverter → AC main switch → energy meter → BESCOM grid connection, using BESCOM's symbol standard. The [SLD](/glossary/sld/) must display fault protection device ratings, conductor sizes, inverter make/model, and the consumer's BESCOM service connection (RR) number in the title block. Systems above 25 kW must include a protection relay specification on the SLD.
Site Layout with Shadow Analysis Annotation
BESCOM uniquely requires that the GA drawing include shadow analysis annotations — minimum sun path data for the solstice dates or a note confirming shading-free hours between 9 AM and 3 PM. The layout must show module rows, cable trays, inverter location, earthing pit positions, and distance from the BESCOM meter board. Scale bar and north arrow mandatory.
Earthing and Lightning Protection Diagram
Separate standalone drawing — not a note appended to the SLD. Must show GI flat strip or copper conductor from each module frame to earthing electrode, inverter body earth, DC negative earth (if isolated system), lightning rod location and coverage radius, and earthing electrode specification (pipe earth or plate earth, depth, expected resistance ≤5 Ω). The earthing diagram is BESCOM's second most common rejection point after SLD symbol errors.
Net Meter Connection Schematic
Shows the bidirectional energy meter's position in the meter board, the export power flow path from inverter AC output to the grid, and the isolation arrangement. For HT consumers, the CT/PT ratios and metering class must be specified. BESCOM's metering department uses this drawing to confirm physical feasibility of meter installation before ordering the meter.
Structural Load Certificate
A signed and stamped structural engineer certificate confirming the roof or mounting structure can carry the additional dead load and wind load under IS 875 Parts 1 and 3. Required for all systems regardless of size — BESCOM sub-division officers in Bangalore Urban divisions have enforced this requirement for all new applications since 2022. The structural engineer must be a licensed professional; BESCOM does not accept self-certification by the EPC.
Watch out. BESCOM's Bangalore Urban divisions have informally added a sixth requirement since mid-2024 — a DISCOM interconnection study report for systems above 50 kW in areas flagged as feeder-constrained. The list of constrained feeders is not publicly published; confirm with the sub-division AE whether your specific feeder requires this report before commissioning.
Full Document Checklist — What the Suvega Portal Requires
BESCOM operates two parallel tracks: the Suvega/DGMS portal (digital application entry and tracking) and the physical file at the sub-division office. Both must be completed — the portal application generates a reference number that must appear on the physical file cover sheet.
Category A — Portal Application (Suvega/DGMS)
- Registered account on Suvega portal (bescom.co.in/suvega or dgms.bescom.co.in)
- Application form completed online: consumer RR number, sanctioned load, proposed system capacity, inverter make/model, module make/model
- Scanned copies of all Category B-E documents uploaded (PDF, max 5 MB per file)
- Application reference number generated and noted (printed on physical file cover)
Category B — Consumer and Property Documents
- Latest BESCOM electricity bill (showing RR number, tariff category, sanctioned load)
- Proof of property ownership (khata extract, sale deed, or registered lease agreement)
- Aadhaar card / PAN card of consumer (or company registration certificate for commercial/industrial)
- NOC from property owner if applicant is a tenant
Category C — Technical Drawings (5 formats per BESCOM Drawing Protocol)
- Single Line Diagram — BESCOM format (Drawing 1)
- Site Layout with shadow analysis annotation (Drawing 2)
- Earthing and Lightning Protection Diagram (Drawing 3)
- Net Meter Connection Schematic (Drawing 4)
- Structural Load Certificate (Drawing 5)
- Load calculation sheet (string sizing, cable sizing, fault level) — signed by licensed contractor
Category D — Equipment Compliance
- Module datasheets with ALMM compliance certificate from manufacturer
- Inverter datasheet confirming model is on current MNRE-approved inverter list
- Anti-islanding test certificate for inverter model
- SPD (surge protection device) specification sheet
Category E — Contractor and Inspection Documents
- Electrical contractor licence — BESCOM/KPTCL scope, currently valid
- Electrical Inspector (EI) or CEIG inspection report for systems above 25 kW
- Installation completion certificate signed by licensed contractor
Category F — Payment
- Application fee (₹500–₹2,500 depending on system capacity — check current schedule at sub-division)
- Net energy meter cost deposit (BESCOM supplies meter; consumer pays at current BESCOM stores rate, typically ₹4,000–₹9,000)
Stage-by-Stage BESCOM Approval Process
30–50
Days — ≤10 kW clean submission
Heaven Designs field data, Q1 2026
45–75
Days — 10–100 kW
Heaven Designs field data, Q1 2026
60–90
Days — 100 kW to 500 kW
Heaven Designs field data, Q1 2026
~68%
First-pass approval — Bangalore Urban divisions
Mercom India, 2024 rooftop tracker
Stage 1 — Portal Submission and Physical File Acceptance
The EPC completes the Suvega portal application, uploads all scanned documents, and obtains the application reference number. The physical file — original drawings, compliance certificates, and payment — is submitted at the sub-division AE office. The AE performs a format check and assigns the file to the technical review queue.
What can go wrong: Missing portal upload or physical file without the portal reference number. BESCOM now requires both — a physical-only file is returned without entering the queue.
Stage 2 — Technical Feasibility (DE/EE Assessment)
The Division Engineer (DE) or Executive Engineer (EE) assesses feeder hosting capacity. BESCOM’s general hosting capacity limit is 30 percent of the feeder’s rated capacity. In Bangalore Urban’s industrial and commercial zones (Electronic City, Peenya, Yeshwanthpur), feeder saturation is common and the DE may issue a partial capacity approval — e.g., approving 30 kW on a 100 kW application.
Timeline: 10–20 working days. BESCOM’s Suvega portal shows stage-wise status — this is the primary advantage over TANGEDCO’s physical-only process.
Stage 3 — Drawing Review and Approval
BESCOM’s technical team reviews all five drawings. The SLD is checked for BESCOM-format symbols, correct fault protection, and RR number in the title block. The shadow analysis annotation on the layout drawing is checked for completeness. The earthing diagram is reviewed for compliance with CEA Safety Regulations. Drawing objections are issued via the portal and by physical letter.
Timeline: 10–20 working days. Resubmission after objection re-enters the queue and adds 10–15 working days.
Stage 4 — Meter Installation
BESCOM issues a meter connection order and procures a bidirectional net energy meter. A BESCOM technician installs the meter at the consumer premises.
Timeline: 7–20 working days. Bangalore Urban divisions maintain better meter stock than district offices. Track status through the Suvega portal; escalate via the DE office reference number if Stage 4 exceeds 20 working days.
Field tip. BESCOM's Suvega portal generates automated email notifications at each stage transition. Make sure the consumer's registered email address and the EPC's contact details are both entered accurately at portal registration — missed notifications are the most common reason EPCs are unaware that their application has been sitting in a correction-required state for weeks.
Stage 5 — Commissioning and Grid Connection Certificate
After meter installation, the EPC commissions the system in the presence of a BESCOM AE or Junior Engineer. For systems above 25 kW, a KERC-specified protection relay test is required before commissioning. BESCOM issues a Grid Connection Certificate — this is the document used for subsidy claim, CEIG reporting, and insurance documentation.
Net Metering Billing and Settlement in Karnataka
BESCOM uses monthly net billing under KERC’s framework. At month end, BESCOM’s billing system calculates:
Net units = Units imported from BESCOM grid − Units exported to BESCOM grid
| Billing Scenario | What Happens |
|---|---|
| Monthly net import (positive) | Consumer billed for net units at applicable BESCOM tariff |
| Monthly net export (negative) | Surplus units banked as kWh credit |
| Year-end surplus credit | Paid at KERC’s APPC rate (₹3.27–₹3.81/kWh for FY2024–25) |
| Grid interruption / outage | No export credit during outage; solar generated is consumed locally or wasted |
| Inverter fault / system downtime | No export credit; normal consumption billed in full |
PROS — BESCOM NET METERING
- Suvega portal enables application status tracking — rare among South Indian DISCOMs
- Competitive APPC export rate — among the highest in South India
- 500 kW ceiling accommodates large C&I projects
- Year-end cash settlement — surplus units paid, not forfeited
- Covers Bangalore tech corridor — ideal for IT parks, SEZs, industrial estates
CONS — BESCOM NET METERING
- Dual track (portal + physical) increases compliance overhead
- Feeder saturation in Bangalore Urban constrains large C&I systems
- Drawing review adds shadow analysis annotation requirement unique to BESCOM
- Interconnection study for > 50 kW on constrained feeders adds cost and time
- APPC rate set annually — payback model has rate uncertainty beyond 1 year
Verdict. BESCOM net metering offers strong financial economics — particularly for Bangalore’s C&I market where BESCOM tariffs are among the highest in the country and the APPC export rate is competitive. The operational challenge is the dual-track submission process and Bangalore Urban’s feeder saturation in dense industrial zones. EPCs that standardise BESCOM-format drawing templates and master the Suvega portal workflow can achieve 90%+ first-pass approvals and 35–50 day end-to-end processing on clean ≤100 kW applications.
Karnataka Solar Market Context
Karnataka consistently ranks among India’s top five states by cumulative solar capacity. According to Mercom India’s Karnataka solar tracker, the state had approximately 9,500 MW of total installed solar capacity by Q1 2025, with BESCOM’s jurisdiction accounting for the majority of rooftop installations given Bangalore’s large commercial and industrial consumer base.
The PM Surya Ghar scheme’s Karnataka allocation for FY2025–26 targets over 3 lakh residential installations — a significant volume driver for BESCOM net metering connections. MNRE’s rooftop solar data shows Karnataka as one of the top states by PM Surya Ghar registration, driven by strong subsidy uptake among Bangalore’s middle-income residential segment.
For industrial and commercial consumers in Bangalore’s Electronic City, Peenya, and Bommasandra industrial areas, BESCOM’s feeder hosting capacity limits are the binding constraint — not economics. The IEA Solar PV 2024 report notes that grid integration limits are increasingly the binding constraint for distributed solar growth in dense urban DISCOMs globally — BESCOM’s Bangalore Urban divisions exemplify this dynamic.
Note. KERC issued a draft amendment in Q4 2024 proposing to raise the net metering ceiling for HT consumers from 500 kW to 1 MW, aligned with TNERC (Tamil Nadu) and MERC (Maharashtra). The amendment was under public comment as of March 2025. Confirm current ceiling with BESCOM before sizing projects above 500 kW.
IRENA’s Renewable Energy Statistics 2023 places India among the global leaders in distributed solar growth — and Karnataka’s BESCOM jurisdiction, covering India’s Silicon Valley, represents the highest-value distributed solar market in South India.
The 10 Most Common BESCOM Rejection Reasons
| # | Rejection Reason | Fix |
|---|---|---|
| 1 | SLD uses generic IEC symbols, not BESCOM symbol set | Use BESCOM-specific symbol library; request from DE office or use Heaven Designs’ BESCOM SLD template |
| 2 | Shadow analysis annotation missing from Site Layout | Add minimum sun path annotation for winter solstice or a written confirmation of shading-free hours 9 AM–3 PM |
| 3 | Earthing diagram merged into SLD as a note | Produce as a standalone sheet — BESCOM Drawing Protocol requires it as Drawing 3 |
| 4 | Module ALMM certificate missing | Attach manufacturer’s ALMM compliance letter per MNRE August 2022 order |
| 5 | Inverter not on MNRE-approved list | Cross-check current quarterly MNRE inverter list; substitute or obtain inclusion letter |
| 6 | Suvega portal reference number missing from physical file | Always complete portal submission before delivering physical file; attach portal acknowledgement printout |
| 7 | Contractor licence expired or outside BESCOM/KPTCL scope | Verify current validity and Karnataka-state scope before commission |
| 8 | Structural certificate from uncertified engineer | Use a licensed structural engineer; BESCOM does not accept EPC self-certification |
| 9 | Net meter schematic missing — only SLD submitted | Prepare Drawing 4 as a separate document from the SLD |
| 10 | BESCOM RR number not on SLD title block | Add the 12-digit RR service connection number to every drawing’s title block |
How Heaven Designs Helps Karnataka EPCs Clear BESCOM Faster
The BESCOM Drawing Protocol adds a shadow analysis requirement not seen in most other state DISCOMs — and that requirement combined with BESCOM’s format-specific SLD symbols means generic drawing templates fail at BESCOM at a higher rate than at most South Indian DISCOMs.
- Solar Rooftop Detailed Engineering Design — Full BESCOM-format drawing package: SLD with BESCOM symbols, shadow-annotated GA, earthing schematic, net meter schematic, structural load certificate. Delivered in 3–5 business days. Over 90% first-pass approval rate across BESCOM Bangalore Urban submissions.
- Electrical CEIG Drawings — CEIG-ready drawings for Karnataka systems above 25 kW, including KERC-specified protection relay documentation.
- Solar 3D Pre-Design — 48-hour 3D layout with shading analysis — gives you the shadow annotation data needed for BESCOM’s Drawing 2 without running a full PVsyst simulation at the sales stage.
- Solar Rooftop Design Company India — Engineering bench for Indian EPCs operating across multiple DISCOMs simultaneously; BESCOM, TANGEDCO, MSEDCL, UGVCL, and JVVNL format libraries maintained and updated quarterly.
- Download sample deliverables — Gated sample pack includes a BESCOM-format SLD and earthing schematic from a completed Bangalore commercial rooftop project.
For a full understanding of how net metering works in India and how BESCOM’s framework compares to other states, the glossary entry provides the regulatory foundation.
FAQ
What is the maximum BESCOM net metering system size under current KERC regulations?
The current ceiling is 500 kW for HT industrial and commercial consumers under KERC Net Metering Regulations 2016 (amended 2023). A proposed KERC amendment to raise this to 1 MW was under public comment as of Q1 2025 — confirm the current ceiling before sizing projects above 500 kW. For LT domestic consumers, the limit is tied to the sanctioned load, typically 10 kW for single-phase and 75 kW for three-phase.
Does BESCOM have an online portal for net metering applications?
Yes. BESCOM uses the Suvega portal (also referenced as DGMS) for net metering application submission and status tracking. The portal is unique among South Indian DISCOMs in providing stage-wise application tracking. However, BESCOM still requires a physical file at the sub-division office — online submission alone is not sufficient. Both tracks must be completed.
Why does BESCOM require shadow analysis on the Site Layout drawing?
KERC’s regulations require that the proposed solar installation not adversely affect neighbouring properties, and BESCOM’s sub-division offices use the shadow analysis annotation as a proxy for confirming that the layout does not create shading issues on adjacent structures. In practice, the requirement is a confirmation that the system itself operates shading-free during peak generation hours — BESCOM officers are not performing shadow analysis calculations themselves but checking that the EPC has done so.
How long does BESCOM take to install the net energy meter?
After drawing approval, BESCOM issues a meter connection order. Meter installation typically takes 7–20 working days. Bangalore Urban divisions generally have better meter availability than district offices. Track the status through the Suvega portal; escalate at 20 working days using the DE office contact and your file reference number.
Is the BESCOM application process the same for all five Karnataka DISCOMs?
No. While all Karnataka DISCOMs operate under KERC regulations, only BESCOM has the Suvega portal for application tracking. MESCOM (Mysuru), HESCOM (Hubli-Dharwad), GESCOM (Gulbarga), and CESC (Chamundeshwari) use physical-only processes similar to TANGEDCO in Tamil Nadu. Drawing format requirements also differ between DISCOMs — BESCOM’s shadow analysis annotation requirement is unique to BESCOM.
What happens to BESCOM banking credit at year end?
Surplus kWh credits accumulated during the year are settled in cash by BESCOM at KERC’s current APPC rate (₹3.27/kWh for LT, ₹3.81/kWh for HT as of FY2024–25). Karnataka does not forfeit unused banking credits — cash settlement is mandated by KERC. The settlement typically happens in the April billing cycle for the previous financial year.
Can an EPC submit BESCOM net metering applications on behalf of multiple consumers simultaneously?
Yes. The Suvega portal allows EPC accounts to manage multiple consumer applications under a single contractor login. This is a significant operational advantage over TANGEDCO’s physical-only process — BESCOM EPCs can track all active applications in a single dashboard and respond to correction notices immediately without making repeated trips to sub-division offices.
