⚡ Regulatory Guide · Part 6
Safety, Behind-Meter & Penalties
Mandatory compliance requirements for solar installations, rules for behind-the-meter systems, and penalties for non-compliance.
Safety, Technical Standards & Grid Requirements
Mandatory compliance for vendors and installers
| Parameter | Standard / Reference | Mandatory Requirement |
|---|---|---|
| Inverter Efficiency & Testing | IEC 61683 / IS 61683 | Compliance required for efficiency and measurements |
| Environmental Testing | IEC 60068-2 (1,2,14,30) | Cold, dry heat, temperature change, damp heat tests |
| Total Harmonic Distortion (THD) | IEEE 519 / CEA 2013 | Individual harmonics < 3%; THD (voltage & current) < 5% |
| Voltage Operating Window | CEA Connectivity Regulations 2013 | 80% – 110% of nominal. Must isolate within 2 seconds. |
| Frequency Trip | CEA Connectivity Regulations 2013 | Trip within 0.2s if freq goes above 50.5 Hz or below 47.5 Hz |
| Synchronization | CEA Connectivity Regulations 2013 | Must not cause voltage fluctuation > ±5% at interconnection point |
| DC Injection | CEA Connectivity Regulations 2013 | < 0.5% of full rated output or < 1% of rated inverter current |
| Power Factor | CEA Connectivity Regulations 2013 | When output > 50%: lagging power factor > 0.9 |
| Anti-Islanding | IEC 62116 | Must detect islanding and disconnect; IEC-62116 tests required |
| Short-term Flicker (Pst) | IEC 61000 / CEA 2013 | ≤ 1 (over 10-minute window) |
| Long-term Flicker (Plt) | IEC 61000 / CEA 2013 | ≤ 0.65 (over ~2-hour window) |
| Power Quality (output) | EN 50160, Discom standards | Tests required at commissioning; inverter must filter harmonics |
| Paralleling Device | CEA Connectivity Regulations 2013 | Must withstand 220% of normal voltage at interconnection point |
| Overload / Overheat | CEA Connectivity Regulations 2013 | Auto shut-off on overload or overheat; auto-restart when normal |
| Manual Isolating Switch | Discom requirement | Visible open/close indication; lockable open; accessible 24×7 to Discom |
| AMI on Meters | CEA Meters Regulations 2006 | RS-485 or higher communication port mandatory on all meters |
⚠️ Key Safety Responsibilities of the Consumer
- Consumer is solely responsible for any fatal or non-fatal accidents caused by back-feeding from the RE system when grid supply is off.
- Any alternate energy source (battery/DG/backup) must be restricted to the consumer's network — must not extend to the Discom's LT grid.
- In emergencies, the Discom has the right to disconnect the consumer's installation at any time.
- The Discom may also disconnect the RE system if it causes power quality problems for other consumers, hazardous conditions, or emergencies.
Behind-the-Meter RE Systems
Regulatory requirements for non-exporting renewable energy systems
System Definition & Regulatory Context
A Behind-the-Meter (BTM) system is a renewable energy installation designed exclusively for captive self-consumption, with zero active power injection into the DISCOM grid. While these systems do not participate in commercial export settlements (Net Metering/Billing), their physical interconnection to the consumer's internal network necessitates strict regulatory oversight. This is to ensure anti-islanding protection and prevent hazardous backfeeding during grid outages, which poses severe safety risks to utility personnel.
| Regulatory Aspect | Mandatory Rules & Penalties |
|---|---|
| Operational Rules (Standard compliance) |
|
| Penalties for Default (Non-compliance actions) |
|
For existing behind-meter solar consumers (pre-Sept 2021)
If you installed a Solar Rooftop PV system behind your meter without opting for Net Metering, you must formally notify the Discom immediately. Failure to do so results in retroactive fixed charges. Note: DC capacity (panels) is unrestricted — only the AC inverter output is regulated.
Penalties & Dispute Resolution
Consequences for non-compliance and how disputes are settled
| Penalties Levied on Consumers | Default Actions by the DISCOM |
|---|---|
| Installing a behind-meter system without intimation triggers fixed charges for the entire installation period. | Failure to complete the technical feasibility study within 15/30 days means the proposal is automatically deemed feasible. |
| Failing to notify the DISCOM of an existing pre-2021 BTM installation triggers ongoing monthly fixed charges. | Failure to issue the Letter of Approval (LoA) within 30 days of application acknowledgement renders the DISCOM in default. |
| Injecting energy into the grid from a BTM system results in severe financial penalties as per RERC Regulations. | Failure to complete commissioning within 15 days of receiving the installation certificate constitutes a formal breach. |
| Failing to commission a standard system within 180 days of LoA issuance results in automatic LoA cancellation. | General failure to meet timeline requirements subjects the DISCOM to specific penalties decided by the RERC. |
Dispute Resolution Mechanism
| Dispute Type | Mandatory Resolution Pathway |
|---|---|
| DISCOM Billing Disputes | Step 1: Escalated to the Consumer Grievance Redressal Forum of the DISCOM. Step 2: If unresolved, the consumer may escalate the grievance to the State Electricity Ombudsman. |
| RESCO vs. Consumer | Resolved purely mutually between the consumer and the RESCO according to their PPA terms. The DISCOM and RERC are strictly not parties to this commercial dispute, and the DISCOM shall not disconnect the consumer due to it. |
| Disputed Arrears | The consumer may deposit the disputed amount with the DISCOM under Section 56 of the Electricity Act 2003. Once deposited, the DISCOM must immediately allow the NM/NB connection pending final resolution. |