Net metering (NEM) and net billing policies are the single most important financial driver for rooftop solar adoption worldwide. They determine how much you save when your solar panels export excess electricity to the grid. A favourable policy can cut your payback period to under 4 years; a poor one can extend it beyond 15.
In 2026, net metering policies are evolving rapidly. Several US states have phased out retail-rate NEM in favour of net billing tariffs, while countries like Pakistan and India continue to expand gross metering regimes. The EU's Renewable Energy Directive (RED III) mandates member states to ensure fair compensation for solar exports. This guide compares every major market so you can assess the financial case for solar in your country.
Net Metering vs Net Billing vs Gross Metering
Before comparing countries, understanding the three models is essential:
| Scheme | How It Works | Typical Export Rate | Best For |
|---|---|---|---|
| Net Metering | Meter runs backward when exporting; you offset future consumption at the full retail rate | 100% of retail rate | Homes that consume most of what they generate |
| Net Billing | Separate meter tracks imports and exports; exports are credited at a predetermined rate | 50-85% of retail rate | Homes with excess generation that export heavily |
| Gross Metering | All solar generation is exported; a separate feed-in tariff pays for all generation | Fixed FIT per kWh (often below retail) | Large systems on net-metering capped utilities |
| Virtual Net Metering | Apartment residents share credits from a common solar array across multiple meters | Varies by utility | Multi-tenant buildings, apartment dwellers |
United States: NEM 3.0 and State-by-State Chaos
The US market is the most fragmented. California's transition from NEM 2.0 to NEM 3.0 (Net Billing Tariff) in April 2023 slashed export rates from ~$0.30/kWh to approximately $0.08/kWh. This dramatically increased payback periods for solar-only systems and catalysed a boom in home battery adoption.
| State | Policy Type | Export Rate | Annual Cap | Rollover | Battery Incentive |
|---|---|---|---|---|---|
| California | Net Billing (NEM 3.0) | ~$0.06-0.10/kWh | None | Monthly cash-out | SGIP ($200-1,000/kWh) |
| New York | Net Metering (NEM) | 100% retail | None | Monthly, indefinite | NY-Sun adder for storage |
| Texas (no state policy) | Utility-dependent | 0-100% retail | Varies | Monthly | None |
| Florida | Net Metering | 100% retail | 2 MW | Monthly, indefinite | None |
| Arizona | Net Metering / Net Billing | 75-100% retail | None | Annual true-up | None |
| Massachusetts | Net Metering | 100% retail | 10 MW (private) | Monthly, indefinite | SMART + ConnectedSolutions |
| Hawaii | Net Billing (CGS+) | ~$0.15/kWh | None | Monthly cash-out | Battery bonus ($500/kW) |
Australia: The Solar Capital of the World
Australia has the highest rooftop solar penetration per capita globally (~33% of homes). The federal Small-scale Renewable Energy Scheme (SRES) provides upfront rebates through STCs. Net metering varies by state but generally follows a net billing model with declining feed-in tariffs (FiTs).
| State | Policy | Feed-in Tariff (2026) | System Cap | Rollover |
|---|---|---|---|---|
| New South Wales | Net Billing | 5-12 c/kWh | 10 kW (single-phase) | Monthly / quarterly |
| Victoria | Net Billing | 6-12 c/kWh | 10 kW (single-phase) | Monthly |
| Queensland | Net Billing | 5-14 c/kWh | 10 kW (single-phase) | Monthly |
| South Australia | Net Billing | 5-12 c/kWh | 10 kW (single-phase) | Monthly |
| Western Australia | Net Billing (Synergy) | 2-7 c/kWh | 5 kW (no approval) | Monthly |
Retail FiTs across Australia have fallen from 60 c/kWh in 2010 to 5-14 c/kWh in 2026. The financial case now relies heavily on self-consumption. Most new systems include battery storage to maximise daytime usage. Our solar payback period guide shows that Australian solar-only systems now recover costs in 4-7 years, while solar-plus-battery extends to 8-12 years.
United Kingdom: Smart Export Guarantee
The UK replaced the Feed-in Tariff (FiT) with the Smart Export Guarantee (SEG) in 2020. Under SEG, licensed electricity suppliers must pay for exported solar power, but the rate is market-driven rather than government-set. The typical SEG rate in 2026 ranges from 3-15 p/kWh depending on the supplier.
| Supplier | SEG Rate (p/kWh) | Export Duration | Smart Meter Required | Payment Frequency |
|---|---|---|---|---|
| Octopus Energy | 15 | 30 min settlement | Yes | Monthly |
| E.ON Next | 12 | 30 min settlement | Yes | Quarterly |
| British Gas | 10 | Half-hourly | Yes | Quarterly |
| OVO Energy | 8 | Half-hourly | Yes | Monthly |
| EDF | 6 | Half-hourly | Yes | Annual |
| Scottish Power | 5 | Half-hourly | Yes | Quarterly |
The SEG model strongly rewards battery storage. By storing solar power and exporting only during peak evening hours (typically 4-8 PM), homeowners can increase effective export rates by 30-50%. The net metering vs battery storage deep dive explains this strategy in detail.
European Union: RED III and National Divergence
The EU's Renewable Energy Directive III (RED III), transposed by member states in 2025, requires fair compensation for renewable self-consumers. However, implementation varies dramatically:
| Country | Policy Model | Export Rate | System Cap | VAT on Solar | Battery Support |
|---|---|---|---|---|---|
| Germany | EEG Feed-in Tariff | 6.4-13.0 c/kWh | 30 kW (simplified) | 0% (since 2023) | KfW loans |
| Netherlands | Net Metering (salderingsregeling) | 100% retail (phasing out from 2027) | None | 21% (standard) | ISDE grant |
| France | Net Billing + FIT | 12-15 c/kWh (FIT ≤9 kW) | 100 kW | 10% | MaPrimeRenov' |
| Italy | Net Billing (Scambio Sul Posto) | ~10-14 c/kWh | 200 kW | 10% (reduced) | Conto Termico |
| Spain | Net Billing | 5-14 c/kWh (market) | 100 kW | 10% (reduced) | IDAE grants |
| Poland | Net Billing (from April 2024) | ~20% of retail (hourly market) | 50 kW | 23% (standard) | Moj Prad 5.0 |
| Austria | Net Metering + FIT | 5-10 c/kWh | 1 MW | 0% (since 2024) | KPC grants |
| Sweden | Tax Credit | 0.60 SEK/kWh tax credit | 500 kW | 25% (standard) | None |
The Netherlands is a critical case. Its generous net metering policy (100% retail rate) has driven the highest per-capita solar adoption in Europe. However, the government is phasing out net metering from 2027 through 2031, reducing the export rate annually. This has created a rush to install solar-plus-battery before the phase-down accelerates.
India: Gross Metering Expansion Under PM Surya Ghar
India's rooftop solar programme has two variants: gross metering (all generation exported, no self-consumption offset) and net metering (self-consumption with export credit). The PM Surya Ghar: Muft Bijli Yojana launched in 2024 offers a 60% subsidy on systems up to 2 kW and 40% on 2-3 kW, plus concessional loans at ~7% interest.
| State | Model | Export Rate | Cap | Subsidy (Central) | Net Metering Available |
|---|---|---|---|---|---|
| Gujarat | Net Metering | Retail rate (incl. cross-subsidy) | ≤10 kW (LT) | Yes (PM Surya Ghar) | Full |
| Maharashtra | Net Metering | Retail rate (incl. cross-subsidy) | ≤10 kW | Yes | Full |
| Rajasthan | Net Metering | Retail rate | ≤10 kW | Yes | Full |
| Uttar Pradesh | Gross Metering | Avg. power purchase cost (~3-4/kWh) | ≤10 kW | Yes | Limited |
| Tamil Nadu | Net / Gross Metering | Retail rate (net) / ~3.5/kWh (gross) | 10 kW (LT) | Yes | Both available |
| Karnataka | Net Metering | Retail rate | ≤10 kW | Yes | Full |
India's transition to gross metering in high-penetration states is driven by distribution company (DISCOM) financial stress. The government solar incentives by country page covers the PM Surya Ghar subsidy structure in detail. Payback periods in net metering states range from 3-5 years; in gross metering states, 6-10 years.
Pakistan: Net Metering Framework Under Strain
Pakistan's Net Metering Regulations 2015 (amended 2024) allow rooftop solar owners to export excess power at the retail rate. However, rising capacity charges (fixed demand costs embedded in the tariff) have created controversy. In early 2026, NEPRA proposed reduced export rates for new customers.
| Item | Details |
|---|---|
| Policy | Net Metering (NEM) / Net Billing (proposed) |
| Export Rate | Retail rate (excl. capacity charges), ~12-15 Rs./kWh effective |
| System Cap | ≤25 kW (single-phase), ≤50 kW (three-phase) |
| Rollover | Monthly netting; annual true-up at end of financial year |
| Processing Fee | Rs. 5,000-15,000 (varies by DISCO) |
| Battery Incentive | None currently; net billing proposal includes export rates for solar+battery |
| Payback Period | 3-5 years (2025), 5-7 years (if net billing is adopted) |
United Arab Emirates: DEWA and SEWA Models
The UAE has two separate regulatory frameworks: DEWA (Dubai) and SEWA (Sharjah/Ajman/Ras Al Khaimah), with Abu Dhabi following its own Emirates Energy & Water Authority framework.
| Emirate | Policy | Export Rate | Cap | Rollover | Battery |
|---|---|---|---|---|---|
| Dubai (DEWA) | Net Metering (Shams Dubai) | Retail rate (23-38 fils/kWh) | ≤10% of building peak load | Monthly, expires after 1 year | Allowed but not incentivised |
| Sharjah (SEWA) | Net Metering | Retail rate (30 fils/kWh) | 1 MW | Monthly, annual true-up | Allowed |
| Abu Dhabi | Net Billing (iSolar) | ~20-25 fils/kWh | ≤10% of peak load | Monthly cash-out | Grid-connected only |
The UAE's net metering policy is clouded by the 10% peak-load cap, which limits system size relative to consumption. However, Dubai's Shams Dubai programme has been highly effective, driving over 500 MW of rooftop solar by 2026. The high retail tariff (23-38 fils/kWh for residential) means payback periods under 5 years even with the cap.
Global Net Metering Comparison Summary
| Country | Policy Type | Export Rate (% of Retail) | Max System (kW) | Battery Attractiveness | Payback Range |
|---|---|---|---|---|---|
| USA (avg. ex-CA) | Net Metering | 100% | Varies by state | Low | 5-8 years |
| USA (California) | Net Billing | ~20-30% | None | High | 7-10 years (with battery) |
| Australia | Net Billing | 10-30% | 10 kW | Medium | 4-7 years |
| United Kingdom | SEG (Market) | 15-50% | None | High | 6-10 years |
| Germany | Feed-in Tariff | 30-50% | 30 kW | Very High | 8-12 years |
| Netherlands | Net Metering (phasing out) | 100% → declining from 2027 | None | Medium (rising) | 5-7 years |
| India (net metering states) | Net Metering | 100% | 10 kW | Low | 3-5 years |
| Pakistan | Net Metering (under review) | ~60-80% | 25-50 kW | Low | 3-5 years |
| UAE (Dubai) | Net Metering | 100% | 10% peak load | Low | 4-6 years |
| France | FIT + Net Billing | 50-100% | 100 kW | Medium | 7-10 years |
| Italy | Net Billing (SSP) | ~40-60% | 200 kW | Medium | 6-9 years |
| Spain | Net Billing | 20-50% | 100 kW | Medium | 7-10 years |
How Net Metering Affects Solar Payback
The export rate is the most sensitive variable in your solar payback calculation. Use the ROI Analysis module in the sidebar to calculate your specific payback period under your local net metering policy. The inputs accept:
- System Cost (ab-cost): Total installed cost in local currency after subsidies
- Tariff Rate (ab-tariff): Your retail electricity price per kWh
- Payback: Simple and discounted payback in years
- 10-Year and 25-Year Savings: Cumulative net benefit over the module lifespan
- IRR: Internal rate of return including exported energy at local export rates
For a detailed breakdown of how different export rates change the financial case, see our solar payback period guide and the solar financing options guide comparing cash, loan, lease, and PPA structures.
Battery Storage Under Different Net Metering Regimes
Battery storage economics depend entirely on the local export rate. Here is the battery attractiveness ranking:
| Export Regime | Battery Value | Rationale | Example Markets |
|---|---|---|---|
| Low export rate (<30% retail) | Very High | Battery maximises self-consumption, avoiding low export rates | California, Australia, Spain |
| Medium export rate (30-70% retail) | High | Battery shifts generation to peak tariff periods for stackable savings | UK, Germany, Italy |
| High export rate (>70% retail) | Low-Medium | Grid acts as free battery; minimal incentive to store | India, Dubai, New York |
| Full retail net metering (100%) | Low | Grid banking effectively replaces physical storage | Netherlands (until 2027), Indian net metering states |
Our dedicated net metering vs battery storage guide analyses the crossover point where adding a battery becomes financially superior to exporting to the grid.
Policy Outlook for 2027 and Beyond
Several significant policy changes are on the horizon:
- Netherlands: Net metering phase-out begins January 2027, with a 10% annual reduction in export rate through 2031.
- California: NEM 3.0 net billing rates are updated annually by the CPUC. Proposed 2027 rate reductions of 5-10% would further incentivise battery pairing.
- Pakistan: NEPRA's proposed net billing tariff could be enforced by mid-2027, reducing export rates to ~Rs. 8-10/kWh from the current effective ~Rs. 12-15/kWh.
- India: More states are expected to move to gross metering as rooftop penetration crosses 10 GW cumulative. The PM Surya Ghar subsidy is guaranteed until 2027.
- Australia: The Australian Energy Market Commission (AEMC) is reviewing a national framework for solar export charges. Solar homes may face export limits or time-of-day charges from 2027.
- EU: The revised RED III implementation may force member states with net billing below 50% retail to raise minimum export compensation levels.
Related Guides
- Government Solar Incentives by Country: 2026 Comparison
- Solar Financing: Loan, Lease, PPA, or Cash?
- Net Metering vs Battery Storage: Which Strategy Wins?
- Solar Payback Period: Complete Guide to ROI Calculations
Calculate your solar ROI with your local net metering policy
Open the ROI Analysis Tool →Data sources: NEPRA (Pakistan), CERC & state ERCs (India), CPUC NEM 3.0 tariff, DEWA Shams Dubai, AEMC & state regulators (Australia), Ofgem SEG register (UK), EU Commission RED III portal, BloombergNEF distributed solar policy tracker. Export rates are indicative for mid-2026 and vary by utility/time-of-use. Always consult your local distribution company or licensed installer for current applicable rates.
Last updated: July 2026 | Browse all guides