The KSEB solar feasibility check is KSEB’s technical approval of how much solar your connection can take. You apply before you install. KSEB looks at your connection and the local network, then tells you the permissible capacity and any conditions. Our process guide targets 15 days for the result, and national rules since 2024 say rooftop systems up to 10 kW do not need a technical feasibility study at all.
Quick facts
- Who applies: any domestic consumer who wants rooftop solar connected to the KSEB grid.
- Where: KSEB’s solar rooftop portal (ekiran.kseb.in), or the paper application at your local KSEB section office.
- Fee: ₹1,000 has been quoted for the Annexure-A paper route in our process guide and other installer guides. Confirm the current fee with KSEB before paying.
- Timeline: targeted within 15 days.
- Result: permissible system capacity and technical requirements for your connection.
- Next step: detailed registration (Annexure-B), which our guide puts at within 30 days of approval.
If you plan to claim the central subsidy, read the Kerala PM Surya Ghar subsidy guide
What the KSEB solar feasibility check decides
KSEB checks whether your connection, and the network behind it, can safely accept the system you want to install. The outcome has two parts: the permissible capacity in kW, and any technical requirements for your connection.
The local transformer is a big part of this. KSEB’s own earlier orders describe feasibility as a check of transformer details and the solar capacity already connected to that transformer. That is why two neighbours on different transformers can get different answers, and why a street that filled up early can run out of room. Recent reporting from Kerala describes homeowners rushing to register before their local transformers hit their technical limits.
Capacity limits that shape your feasibility result
| Rule | What it says | Status |
|---|---|---|
| Minimum and maximum size | A system must be between 1 kW and 1,000 kW (AC side of the inverter) | 2020 regulations, still cited on KSEB’s portal FAQ |
| Link to your connected load | The system cannot exceed your sanctioned connected load or contract demand | 2020 regulations |
| Domestic consumers | Domestic consumers with a connected load up to 20 kW may install up to 20 kW, whatever their load | 2020 regulations; newer rules may differ |
| 2025 regulations | Notified in late 2025. Reports differ on the domestic net-metering limit (3 kW, 5 kW with storage, or 20 kW) | Unconfirmed: ask KSEB |
| Technical study | No technical feasibility study for rooftop systems up to 10 kW (national rule, Feb 2024) | National rule; confirm KSEB practice |
We update this table when KSEB confirms the current limits in writing. This is general information, not legal advice.
Do you need a feasibility study for a home system?
National rules changed in 2024. Under the Electricity (Rights of Consumers) Amendment Rules, 2024, a technical feasibility study is not required for rooftop systems up to 10 kW. For larger systems, the study period was cut from 20 days to 15, and if the study is not finished in time the approval is treated as granted. Trade coverage of the amendment is summarised by Renewable Watch.
In practice, KSEB has continued to run a feasibility step for domestic applicants, so most Kerala homeowners will still be asked to complete one. If you are told a study is required for a system up to 10 kW, ask the section office, in writing, how the 2024 rule is being applied.
Feasibility is not the only KSEB approval
| Approval | What it is |
|---|---|
| Feasibility approval | KSEB confirms the capacity and technical conditions for your connection. This page. |
| Registration (Annexure-B) | Detailed application with system specifications, BIS certificates and layout, followed by your registration number |
| Electrical Inspector certificate | Safety certification of the finished installation |
| Net metering agreement | The formal agreement your system cannot go live without |
| Bi-directional meter | The meter that starts net metering billing |
Many people say “feasibility approved” when they mean the whole process is done. It is only the first of five approvals.
Two ways to apply for the KSEB feasibility check
Route 1: Online through the KSEB solar rooftop portal
KSEB runs a solar rooftop portal at ekiran.kseb.in. As described on the portal, the flow is:
- Check that your mobile number and email are linked to your KSEB consumer number. The portal asks for this first.
- Use the portal’s calculator with your 13-digit consumer number and your shade-free roof area to see a suitable plant size.
- Submit an expression of interest and choose a developer (installer).
- Your developer visits and accepts the site. You will be asked for photographs of the roof from four directions: north, east, south and west.
- KSEB carries out the technical feasibility.
- Installation, testing and net meter connection follow.
Route 2: Annexure-A at your KSEB section office
Our process guide describes the paper route: submit the Annexure-A feasibility form at your local KSEB office with the application fee (₹1,000 as quoted in our guide), and keep the acknowledgement. Ask your section office which route it is currently using for domestic applications, since KSEB has changed its process over time.
What to prepare before you apply
- Consumer number: the 13-digit number from your KSEB bill.
- Contact details: a mobile number and email linked to that consumer number, so you receive OTPs and updates.
- Recent bills: your last three KSEB bills to size the system.
- Roof details: shade-free area (plan for 60–80 sq ft per kW) and photographs of the roof from four directions.
- Ownership proof: property documents in the name that appears on the connection.
- Connection type: whether your supply is single-phase or three-phase. This matters for meter availability (see below).
- Capacity plan: the kW you want. For sizing and costs, see 3kW solar pricing in Kerala
How to check your KSEB feasibility status online
If you applied through the portal, KSEB’s solar rooftop portal has a “Track my application” option. If you applied at a section office, go there with your consumer number and application number and ask for the status and the result. Installers can also follow up for you and share the written result. A short message works well:
How to read the feasibility result
| Result | What to do |
|---|---|
| Approved at the capacity you asked for | Move on to registration. Our guide puts the Annexure-B window at 30 days from approval, so do not let it lapse. |
| Approved at a lower capacity | Either install the lower capacity, or ask KSEB in writing what would allow more, such as a network or connection upgrade. |
| Approved with conditions | Ask your installer to design to the conditions and keep the written conditions with your file. |
| Still pending after 15 days | Follow up in writing at the section office, then at the division office. Mention the 2024 national rule on timelines and ask KSEB to confirm in writing how it applies. |
| Rejected or returned | Ask for the reasons in writing. Document mismatches, such as a bill name that does not match the ownership papers, are the easiest to fix. |
Common reasons feasibility gets delayed
- Transformer at or near its limit. The most common cause of lower approved capacity or long waits.
- Mobile or email not linked to the consumer number, so portal steps stall.
- Incomplete or unclear roof photos, or missing ownership proof.
- Name mismatch between the KSEB bill and the ownership documents.
- Capacity larger than the roof or the sanctioned load can support.
- High demand in your area, when many neighbours apply at once.
Rooftop solar cost in Kerala after subsidy.
Feasibility is approved: what can still delay you
Approval does not mean you will be generating power next week. Reporting from Kannur in September 2026 described three-phase net meters as out of stock across the state, with more than 2,000 domestic installations stalled. KSEB has allowed consumers to buy their own compliant meters, with meter rent waived, but few have done so because of cost, testing time and concerns about future liability. Subsidies are paid only after the system is connected and generating, so delays cost households money; see the Onmanorama report.
So ask your installer two questions before you book: whether your connection is single-phase or three-phase, and what the current wait is for the meter.
For help once a stage stalls, see how to fix KSEB net metering delays, and to understand the meter itself,
Timeline example: a typical application
| Step | Action | Timeline (from our process guide) |
|---|---|---|
| 1 | Submit your application | Day 1 |
| 2 | KSEB feasibility check | Within 15 days |
| 3 | Registration and Annexure-B | Within 30 days of approval |
| 4 | System installation | Within 1 year of registration |
| 5 | Electrical Inspector certificate, KSEB testing, net metering agreement | After installation |
| 6 | Bi-directional meter installed | Within 10 days of the agreement |
As an example, if you apply on the 1st of a month, you can expect the feasibility result by about the 16th. If it is approved that day, plan to complete Annexure-B before the end of the following month. These are targets: a busy transformer area or a meter shortage can stretch the later steps.
Mistakes that delay approval
- Missing the 30-day window for Annexure-B after approval.
- Applying for more capacity than your roof or sanctioned load allows.
- A name on the KSEB bill that does not match the ownership documents.
- Paying for equipment before the feasibility result is known.
- Not checking meter availability for your phase type.
Need help with the application?
Our Kerala team can check your roof, prepare your documents and follow up with KSEB at each stage.
Contact Kondaas to book a free site survey.
KSEB solar feasibility FAQs
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Is a feasibility study mandatory for rooftop solar up to 10 kW?
Under the Electricity (Rights of Consumers) Amendment Rules, 2024, rooftop systems up to 10 kW are exempt from a technical feasibility study. KSEB has still run a feasibility step for domestic applicants, so confirm what applies to your application.
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How long does the KSEB feasibility check take?
The target is 15 days. After approval, our process guide puts the detailed registration (Annexure-B) at within 30 days.
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Can I check KSEB solar feasibility status online?
KSEB’s solar rooftop portal has a “Track my application” option. If you applied at a section office, ask them for the status using your consumer and application numbers.
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Do I need an installer to apply?
KSEB’s portal lets consumers choose a developer and submit the application, and the developer visits your site as part of the process. An experienced installer also helps you avoid document mistakes.
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What if the local transformer is at its limit?
KSEB may approve a lower capacity, attach conditions or delay the approval. Ask KSEB in writing what would allow the capacity you want, and decide whether a smaller system still makes sense.
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What is the maximum solar capacity I can get at home?
Under the 2020 regulations, domestic consumers with a connected load up to 20 kW could install up to 20 kW. Newer 2025 regulations may change the net-metering limit, and reports differ, so ask KSEB for the figure that applies to your application date.
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Does feasibility approval guarantee net metering?
No. You still need installation, the Electrical Inspector certificate, a net metering agreement and a bi-directional meter, and meter availability can delay the last step.
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Does feasibility approval mean I get the PM Surya Ghar subsidy?
No. You choose to apply with or without the subsidy during registration, and the subsidy is paid only after your system is installed, connected and generating.
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Is the feasibility result valid forever?
Not in practice. Our process guide gives you 30 days after approval to file Annexure-B, so move quickly once you have the result.