Your TANGEDCO sanctioned load determines the maximum power your connection is designed to handle. It is printed on your TANGEDCO bill and typically ranges from 1-3 kW for most residential homes and 5-50 kW for commercial establishments. When installing rooftop solar, your sanctioned load matters because TANGEDCO generally requires that the solar system capacity be compatible with your sanctioned load -- and in many cases, you will need to increase it before or alongside your solar installation.

This guide walks you through the complete process: why you might need a load increase, how to apply, what documents you need, fees involved, and how to coordinate this with your solar installation timeline.

Why Sanctioned Load Matters for Solar

The Compatibility Requirement

TANGEDCO's net metering guidelines specify that the solar system capacity should be appropriate for the consumer's sanctioned load and consumption pattern. While there is no strict rule that the solar system must be less than or equal to the sanctioned load, section offices commonly require:

Solar system capacity should not exceed the sanctioned load (some sections apply this strictly)
The sanctioned load should be sufficient to handle the bidirectional power flow from the solar inverter
The local transformer should have capacity for the additional solar generation being fed back

Common Scenarios Requiring Load Increase

Current Sanctioned Load	Desired Solar System	Load Increase Needed?
1 kW	1 kW solar	Likely no
2 kW	2-3 kW solar	Possibly (section-dependent)
2 kW	5 kW solar	Yes
3 kW	3 kW solar	Likely no
3 kW	5 kW solar	Yes
5 kW (three-phase)	5-8 kW solar	Likely no
5 kW (three-phase)	10 kW solar	Yes

The Practical Reality

Even if your section office does not strictly enforce the sanctioned load limit for solar, having an adequate sanctioned load protects you from:

Subsidy application rejection -- the PM Surya Ghar portal may flag applications where system size significantly exceeds sanctioned load
Future billing disputes -- TANGEDCO could claim your solar system exceeds your connection's capacity
Transformer overload issues -- if many homes on the same transformer install oversized solar systems, the transformer can be overloaded during peak generation, potentially causing tripping

Step-by-Step Process for Sanctioned Load Increase

Step 1: Determine Your Current Sanctioned Load

Check your TANGEDCO bill. The sanctioned load is typically listed as "Connected Load" or "Sanctioned Load" in the bill header, expressed in kW or HP.

If it is not clear on your bill, visit your TANGEDCO section office with your consumer number and ask for your connection details.

Step 2: Determine Your Required Sanctioned Load

As a rule of thumb, your new sanctioned load should be at least equal to your planned solar system size plus your existing major loads that can run simultaneously.

Example: If you plan a 5 kW solar system and have 2 air conditioners (1.5 kW each), a water heater (2 kW), and general loads (1 kW), your total concurrent load is approximately 7 kW. Request 7-8 kW sanctioned load.

Step 3: Submit Application

Visit your local TANGEDCO section office and submit a written application to the Assistant Engineer (AE). Required documents:

Document	Purpose
Written application to AE	Request for load increase
Latest TANGEDCO bill copy	Consumer number and existing load verification
Proof of ownership or occupancy	Property tax receipt, sale deed, or rental agreement with owner NOC
Aadhaar card copy	Identity verification
Wiring inspection report	From a licensed electrical contractor certifying internal wiring can handle the increased load
Building plan approval (if required)	Some sections request this for significant load increases

Application format: Address the letter to the AE with your consumer number, current sanctioned load, requested new sanctioned load, and reason (solar installation). Attach all supporting documents.

Step 4: Inspection

The section AE or designated inspector visits your premises to verify:

Internal wiring capacity -- cables, MCBs, and distribution board must support the higher load
Transformer capacity -- the local transformer must have spare capacity for your increased load
Meter compatibility -- your current meter must handle the higher load, or a meter replacement is needed

Step 5: Fee Calculation and Payment

TANGEDCO calculates fees based on the load increase quantum:

Fee Component	Approximate Cost
Application and processing fee	Rs 200-500
Development charges	Rs 500-2,000
Security deposit (for additional load)	Rs 100-200 per kW additional load
Meter change (if needed)	Rs 1,000-2,500
Service line upgrade (if needed)	Rs 2,000-10,000
Total typical cost (2-3 kW increase)	Rs 3,800-15,000

For phase conversion combined with load increase, see our guide on single-phase to three-phase conversion.

Step 6: Implementation

After fee payment, TANGEDCO:

Updates your consumer record with the new sanctioned load
Replaces the meter if the existing meter is not rated for the higher load
Issues a revised consumer card

Step 7: Proceed with Solar Installation

Once the sanctioned load increase is approved and implemented, your solar installation can proceed with full TANGEDCO compatibility.

Timeline

Stage	Expected Duration
Application to inspection	10-20 days
Inspection to fee assessment	7-15 days
Fee payment to implementation	10-25 days
Total	30-60 days

Urban sections (Chennai, Coimbatore, Madurai) tend to be faster due to higher staff density. Rural and semi-urban sections may take longer.

Coordinating Load Increase with Solar Installation

The most efficient approach is to run both processes in parallel:

Week 1: Apply for sanctioned load increase at TANGEDCO section office AND register on PM Surya Ghar portal for solar subsidy

Week 2-4: TANGEDCO processes load increase; vendor begins procurement of solar components

Week 4-6: Load increase approved and implemented; vendor installs solar system

Week 6-8: TANGEDCO inspects solar installation; net meter installed

Week 8-10: Net metering commissioned; system goes live

By overlapping the processes, you save 4-6 weeks compared to doing them sequentially.

Common Pitfalls and How to Avoid Them

Pitfall 1: Applying for Too Small a Load Increase

If you increase your load from 2 kW to 3 kW today for a 3 kW solar system, but want to expand to 5 kW in two years, you will need another load increase application. Apply for the maximum load you anticipate needing -- the marginal cost of requesting a higher load upfront is minimal.

Pitfall 2: Internal Wiring Not Upgraded

The TANGEDCO inspector will check your wiring. If your internal wiring (cable gauge, MCB ratings, distribution board capacity) cannot handle the increased load, the application will be returned for correction. Have a licensed electrician inspect and upgrade your wiring before the TANGEDCO inspection.

Pitfall 3: Transformer Capacity Issues

In some older residential areas, the local transformer is already fully loaded. If TANGEDCO determines that the transformer cannot support your load increase, they may:

Offer to install a new transformer (cost shared between TANGEDCO and the consumer)
Suggest connecting to a different, less loaded transformer nearby
Delay the approval until transformer augmentation is completed

This is uncommon in well-served urban areas but can be an issue in rapidly developing suburban zones.

Pitfall 4: Not Coordinating with Solar Application

If you submit your PM Surya Ghar application showing a 5 kW system but your TANGEDCO records still show a 2 kW sanctioned load, the application may be flagged. Ensure the load increase is at least in process (application submitted) before the solar technical feasibility check.

Pitfall 5: Incorrect Fee Payment

TANGEDCO's fee structure can be confusing, with multiple components calculated differently. Always get a written fee estimate from the section office and verify each component before payment. Keep receipts for all payments.

Cost-Benefit Analysis: Is the Load Increase Worth It?

A sanctioned load increase costs Rs 3,800-15,000. This enables a solar system that saves Rs 15,000-50,000+ per year on electricity. The load increase cost is recovered within the first 2-4 months of solar operation.

Investment	Cost	Recovery Time
Load increase (2 kW to 5 kW)	Rs 8,000-15,000	2-3 months of solar savings
Phase conversion + load increase	Rs 15,000-30,000	3-5 months of solar savings
Solar system (5 kW, after subsidy)	Rs 1,92,000-2,42,000	4-6 years

The load increase is a small but necessary investment that unlocks the much larger savings from solar.

Special Cases

Rented Premises

If you are renting, the load increase must be applied for by the consumer whose name is on the TANGEDCO connection (typically the landlord). You will need the landlord's cooperation and signature on the application.

Multiple Service Connections

Some properties have multiple TANGEDCO service connections (ground floor and first floor, or residential and commercial). Each connection has its own sanctioned load. The solar system must be connected to one specific service connection, and the load increase applies only to that connection.

Recently Built Homes

Newer homes (post-2015) often have adequate sanctioned load (3-5 kW) and three-phase connections, requiring no load increase for typical residential solar systems up to 5 kW.

Next Steps

Check your current sanctioned load on your latest TANGEDCO bill
Determine your desired solar system size using our solar savings calculator
If a load increase is needed, begin the application process immediately
Coordinate with your solar vendor to run both processes in parallel

Contact Tristar for end-to-end assistance. We handle both the TANGEDCO load increase process and solar installation, ensuring seamless coordination and minimum total timeline from application to system commissioning.

How to Increase TANGEDCO Sanctioned Load for Solar Installation