Solar Panel Net Metering System: Meter, Cost and Rules
.jpeg)
.jpeg)
A solar panel net metering system is a grid-connected rooftop setup in which your panels and on-grid inverter feed your home first, send any surplus to the DISCOM grid, and a bidirectional net meter records the units you import and export so you are billed only for the difference. Getting one working needs three things beyond the panels: a DISCOM-approved net meter (about Rs 2,800 to Rs 7,500 for single phase, around Rs 9,500 for three phase, verify at publish), a solar generation meter, and DISCOM approval, which commonly takes 45 to 90 days. Most guides skip two facts. You rarely get to choose the meter brand, because your DISCOM's approved list decides it. And the meter does not decide how much credit you earn. Your state regulator's settlement rules do.
Quick Facts About Net Metering
Question | Short answer |
|---|---|
What is it? | Rooftop solar + on-grid or hybrid inverter + generation meter + bidirectional net meter, connected to the grid |
What does the net meter do? | Records import and export in separate kWh registers so the DISCOM can bill the net |
Metering cost | Rs 2,800 to Rs 15,000 for home meters; Rs 33,000+ for CT-operated (verify at publish) |
Who supplies the meter? | Depends on DISCOM: some install their own, others let you buy an approved make and test it |
Can I pick the "best" meter brand? | Only from your DISCOM's approved list and specification |
Standards to look for | IS 16444 (smart) or IS 13779, Class 1.0 accuracy |
Approval time | Rules target weeks; 45 to 90 days is common in practice |
Works in a power cut? | No. On-grid systems shut down during outages by design |
What Is Net Metering for Solar Panels?
Net metering for solar panels is a billing arrangement where the units you export are set off against the units you import, and you pay only for the difference. Surplus credit carries forward month to month within the settlement year. The Electricity (Rights of Consumers) Amendment Rules of 30 June 2021 allow net metering up to 500 kW or your sanctioned load, whichever is lower, with state regulators setting the details. For the full billing explainer, including net billing and gross metering, read our guide on how net metering works in India. This page covers the hardware, approvals and money.
Solar Panel Net Metering System: The Parts and Who Supplies Each
A solar panel net metering system is a chain, and the net meter is the last link before the grid.
Component | Its job in net metering | Who usually supplies it | Approval checkpoint |
|---|---|---|---|
Solar panels | Produce DC power | Your installer | ALMM-listed for PM Surya Ghar subsidy |
On-grid or hybrid inverter | Converts DC to AC; disconnects in outages (anti-islanding) | Your installer | IEC 62116 anti-islanding certificate |
AC distribution box | Isolation and surge protection | Your installer | Checked at DISCOM inspection |
Solar generation meter | Records total solar production | Installer or you | Required under HERC rules in Haryana |
Bidirectional net meter | Records import and export at the grid boundary | DISCOM, or you from its approved list | Tested in DISCOM lab and sealed |
Grid connection | Carries surplus out and imports at night | DISCOM | Capacity cannot exceed sanctioned load |
Two rules shape the system before any meter is fitted. Your solar capacity cannot exceed your sanctioned or connected load. And if you want the PM Surya Ghar subsidy (Rs 30,000 per kW for the first 2 kW, Rs 18,000 for the third, capped at Rs 78,000), the modules must be ALMM-listed and the vendor registered. Our on-grid solar system diagram shows the wiring order, our guide to choosing an on-grid solar inverter covers the inverter, and our PM Surya Ghar eligibility guide lists the exclusions. For full system prices and payback, see our on-grid solar system guide.
Net Meter for Solar Panels: The Types You Will Actually Be Offered
Which meter you get depends on your connection, not your preference. If you are unsure which supply you have, our single phase vs three phase guide explains how to check your bill.
Meter type | Where it is used | Current rating (CEA spec) | Indicative price | What it records |
|---|---|---|---|---|
Single phase whole-current net meter | Most homes up to a few kW | 5-30 A or 5-60 A | Rs 2,800 to Rs 7,500 | Import kWh, export kWh, net |
Three phase whole-current net meter | Larger homes, shops | 10-60 A or 10-100 A | Around Rs 9,500 | Import and export per phase, total |
LT CT-operated net meter | Commercial and industrial rooftops | Via current transformers | Rs 15,000+ plus CT set | Same, through CTs |
HT CT-operated (11 kV) net meter | Large plants on HT supply | Via CT/PT units | Rs 33,000 to Rs 40,000 | Same, at high tension |
Smart net meter (IS 16444) | Increasingly the default under DISCOM smart meter rollouts | As above | Higher end of each range | Adds remote reading, time-stamped data, tamper logs |
Prices come from DISCOM-specification listings on B2B marketplaces and installer guides, and they move. Treat them as a check on a quote, not a price list. The Central Electricity Authority's net meter specification sets Class 1.0 accuracy, separate import and export registers and 12 months of stored billing history. Every approved meter, cheap or costly, meets that floor.
Best Net Meter for Solar Panels: Why You Rarely Get to Choose
People search for the best net meter for solar panels expecting a brand ranking. There is no best meter to buy. There is only the right meter for your DISCOM.
What people assume | What actually happens |
|---|---|
"I can buy any bidirectional meter online." | The DISCOM accepts only makes on its approved list, built to its spec, and tests the unit in its own lab before sealing it. |
"A premium meter will save me more money." | Savings come from generation and tariff. A Class 1.0 meter from any approved make counts the same units. |
"A smart meter earns better credits." | Credit value is set by your state regulator's order, not by meter features. |
"My installer's meter is automatically fine." | Only if it matches the DISCOM list and rating. A wrong make means a failed inspection and a second purchase. |
"The net meter gives me backup." | It does nothing during outages. Backup needs a battery and a hybrid inverter. |
What should "best" mean, then? Run five checks. The make is on your DISCOM's current approved list. The phase and current rating match your sanctioned load. It meets IS 16444 or IS 13779 at Class 1.0. It carries a DISCOM lab test report. And your quote says who supplies it, so you do not pay twice. Makers such as Secure and HPL sell meters built to DISCOM specifications, but approved lists differ by DISCOM, so ask for yours in writing. For trust: Adwin makes panels, inverters and batteries, not meters. We have nothing to sell you here.
What the Metering Really Costs: The Full Bill
The meter is one line in a longer bill. Here is a typical Haryana home on a single phase connection (indicative price).
Cost item | Who pays | Typical amount |
|---|---|---|
Application processing fee (HERC regulations) | You | Rs 1,000, non-refundable |
Bidirectional net meter, single phase | You (supplied by DISCOM or bought from approved make) | Rs 2,800 to Rs 7,500 |
Solar generation meter | You | Usually inside the installer package; ask for it itemised |
Meter testing at DISCOM lab | You | As per DISCOM schedule |
Load enhancement, if solar exceeds sanctioned load | You pay DISCOM charges; DISCOM does the work | As per DISCOM schedule |
Check meter (systems above 50 kWp only) | You | Not relevant for most homes |
For a 3 kW home system, metering costs usually land between Rs 4,000 and Rs 10,000. Small next to the system, but it is the line most often sprung as an extra when an installer quotes "system only".
Net Metering Solar Panel Sizing: The Haryana Year-End Rule
This fact changes how big you should build. Under the HERC Rooftop Solar regulations of 19 July 2021, unadjusted net credited units lapse at the end of the settlement period (the financial year) and are not paid for. Several installer guides say instead that Haryana pays for surplus at the average power purchase cost of about Rs 3.85 per unit. The sources conflict, so ask your DISCOM in writing and check for HERC amendments at publish.
Either way the maths points the same way. Take a home using 250 units a month (3,000 a year). In Haryana a well-placed system makes roughly 4 units per kW per day, about 1,400 per kW per year.
System size | Yearly generation | Surplus over 3,000 units | Value if units lapse | Value at Rs 3.85 per unit |
|---|---|---|---|---|
2 kW | 2,800 units | 0 (covers 93%) | Nil | Nil |
3 kW | 4,200 units | 1,200 units | Rs 0 | Rs 4,620 |
4 kW | 5,600 units | 2,600 units | Rs 0 | Rs 10,010 |
The 4th kW adds about Rs 60,000 with no extra subsidy, because the subsidy caps at 3 kW. It adds 1,400 units, all surplus. If units lapse, it earns nothing. At Rs 3.85, it earns Rs 5,390 a year: an 11-year payback on that one kW. Size to your consumption, not your roof. Our home solar system size and cost guide and the Adwin solar calculator help you get the number right.
How to Get a Solar Panel Net Metering System Approved: Step by Step
- Read your bill. Note sanctioned load, phase and the exact name on the connection. In Haryana the name on the bill and property papers must match or the application can be rejected.
- Apply online. Use the PM Surya Ghar portal (pmsuryaghar.gov.in) or your DISCOM's solar portal (DHBVN or UHBVN in Haryana) and pay the Rs 1,000 fee.
- Feasibility. Systems up to 10 kW need no technical feasibility study under the Ministry of Power's February 2024 amendment, adopted by HERC in July 2024. Above 10 kW the DISCOM has 15 days, after which the proposal is deemed feasible.
- Install through a registered vendor with ALMM modules and a compliant inverter. Our Haryana solar subsidy application guide walks through the local portal.
- Arrange the meters. Confirm whether the DISCOM supplies the net meter or you buy an approved make. Get the generation meter itemised.
- Testing, inspection and sealing. The DISCOM tests the meter, inspects the site, seals the meter and commissions the connection.
- Check your first bill for separate import and export figures.
The rules target a few weeks. In practice 45 to 90 days is common, and site inspection is where most delays happen.
How to Read Your Net Meter
Press the display button and the screen cycles through its registers. Look for kWh import (IMP, "I" or kWh-Imp) and kWh export (EXP, "E" or kWh-Exp). Both are cumulative, so subtract last month's reading to get this month's units. If export stays flat on a sunny afternoon while your inverter shows generation, complain: under the February 2024 rules the DISCOM must fit a check meter within five days of a disputed reading. Our guide to calculating your electricity bill turns the net figure into rupees.
Honest Pros and Cons
Where the grid is stable, the case is strong. A battery-free on-grid system with a net meter cuts your bill for years, the metering costs a few thousand rupees, and it needs no effort after commissioning.
The trade-offs are real. Approval takes weeks longer than installation. You cannot choose the meter make. Surplus above your own use is worth little or nothing at year end. You get no backup in outages. And the rules are moving.
Solar Panel Net Metering Changes in 2026: The Draft Charge Above 5 kW
On 12 March 2026 the Ministry of Power issued the draft Electricity (Rights of Consumers) Amendment Rules, 2026 for comment (deadline 11 April 2026). The draft lets state regulators levy a progressive net metering charge on systems above 5 kW, tied to the cost of storage the grid provides. Systems up to 5 kW stay exempt. It also proposes time-of-day tariffs with peak rates at least 20% higher and solar-hour rates at least 20% lower, and storage mandates for prosumers above 500 kW.
If it goes through, homes near 5 kW should think hard before going bigger, and batteries start to pay, because storing midday solar for the evening beats exporting it cheaply. Our guides on solar battery storage and hybrid solar inverters cover that route.
Who a Solar Panel Net Metering System Suits
Fit | Your situation | Why |
|---|---|---|
Strong fit | Stable grid, monthly bill Rs 1,500+, own roof, system at or below yearly use, 5 kW or less | Every unit offsets a retail-priced unit; no draft charge exposure |
Marginal fit | Sizing above yearly use, 5 to 10 kW systems, or DISCOMs with long approval queues | Surplus earns little; possible future charge; cash tied up for months |
Not a fit | Frequent outages with no battery plan, rented home without owner consent, name mismatch on bill | On-grid shuts down in cuts; the application can fail on paperwork |
FAQs
What is a solar panel net metering system?
A solar panel net metering system is a grid-connected rooftop setup with panels, an on-grid or hybrid inverter, a solar generation meter and a bidirectional net meter. It uses solar power at home first, exports the surplus, and bills you only for net units. It needs DISCOM approval before the net meter is sealed.
How much does a solar panel net metering system cost in India?
A complete on-grid system typically costs Rs 55,000 to Rs 85,000 per kW before subsidy, so about Rs 1.65 lakh to Rs 2.55 lakh for 3 kW, less up to Rs 78,000 under PM Surya Ghar. Metering adds roughly Rs 4,000 to Rs 10,000. Verify prices at publish.
What is the best net meter for solar panels?
The best net meter for solar panels is any make on your DISCOM's approved list that matches your phase and sanctioned load and meets IS 16444 or IS 13779 at Class 1.0 accuracy. Brand does not change your savings, because the state regulator fixes the credit value. Ask your DISCOM for its approved list before buying.
How much does a net meter for solar panels cost?
A single phase net meter costs about Rs 2,800 to Rs 7,500 and a three phase meter around Rs 9,500. CT-operated meters for large commercial systems cost Rs 15,000 to Rs 40,000. Add the application fee (Rs 1,000 in Haryana) and a solar generation meter.
Who provides the net meter, the DISCOM or the consumer?
It depends on the DISCOM. Some supply and install the meter and bill you for it. Others, including Haryana under HERC rules, let you buy from approved vendors and then test it in the DISCOM lab. Either way, the consumer usually pays.
What is the difference between a net meter and a solar generation meter?
A net meter sits at your grid connection and records import and export. A solar generation meter sits after the inverter and records only what your panels produce. You need both readings to know how much solar you consumed at home.
How does solar panel net metering work without a battery?
Solar panel net metering works without a battery. Surplus goes to the grid by day and you draw it back at night, with the net meter recording both. The catch is that an on-grid system switches off during power cuts, so you get no backup.
How long does it take to get a net meter installed?
Rules target a few weeks, and systems up to 10 kW no longer need a feasibility study. In practice, 45 to 90 days from application to a working net meter is common, with site inspection the usual bottleneck.
Can I install solar panels larger than my sanctioned load?
No. Under net metering, capacity cannot exceed your sanctioned or connected load, with a national ceiling of 500 kW. Apply for load enhancement first; the DISCOM does the work under the 2024 rules, but charges may apply.
What happens to extra units at the end of the year in Haryana?
HERC's 2021 regulations say unadjusted units lapse at the end of the financial year without payment. Some installer guides claim payment at around Rs 3.85 per unit. Confirm the current rule with DHBVN or UHBVN, and size your system to your yearly use either way.
Conclusion
A solar panel net metering system pays off when you treat the metering as a regulated step, not a shopping decision. Let the DISCOM's approved list decide the meter brand. Get metering costs itemised in your quote. Size the system to your real consumption, because in Haryana surplus units may be worth nothing at year end, and check the 2026 draft rules before going above 5 kW. For the billing side, start with our net metering explainer. To size and price a system for your home, use the solar calculator above or explore Adwin's solar power systems.
.jpeg)
.jpeg)
.jpeg)
.jpeg)
