If you’re planning to install solar in Sri Lanka, choosing the right system size and panels is only half the story.
The real financial impact of your investment often comes down to one critical decision:
Which solar export scheme should you choose: Net Metering, Net Accounting, or Net Plus?
Get this right, and your system becomes a powerful long-term asset.
Get it wrong, and you could leave a significant amount of money on the table.
This guide breaks it all down in a clear, practical way so you can make the right call based on how you actually use electricity.
Why Export Schemes Matter More Than You Think
Sri Lanka doesn’t rely heavily on upfront solar subsidies. Instead, it offers value through how your excess energy is treated.
That’s where export schemes come in.
Understanding financial mechanisms is key to helping users move from research to confident decision-making.
Because ultimately,
- Your system generates power during the day
- You don’t always use all of it
- The rest goes back to the grid
What happens to that excess energy defines your ROI.
The Three Main Solar Export Schemes in Sri Lanka
Let’s start with a simple overview.
Scheme | How It Works | Best For |
Net Metering | Exported units offset imported units | Balanced usage |
Net Accounting | Exported units sold at a fixed rate | Moderate excess generation |
Net Plus | All generated energy sold to the grid | High generation / low daytime use |
1. Net Metering: The Most Common Starting Point
How It Works
- Your solar system first powers your home or business
- Any excess energy is exported to the grid
- Exported units are credited against future consumption
You’re essentially using the grid as a virtual battery
Key Benefits
- Simple and widely adopted
- Maximises self-consumption value
- Ideal for homes with daytime usage
Limitations
- You don’t get paid in cash
- Credits are used only to offset future bills
- Less effective if you generate much more than you consume
Best Fit For:
- Residential homes
- Offices with daytime operations
- Users with balanced generation and consumption
2. Net Accounting: The Middle Ground
How It Works
- You consume solar power first
- Excess energy is exported
- Exported energy is paid at a fixed rate
Unlike net metering, this converts excess energy into monetary value
Key Benefits
- Earn from excess generation
- More predictable financial returns
- Suitable for slightly oversized systems
Limitations
- Export rate is lower than retail electricity price
- Requires careful system sizing
Best Fit For:
- Homes with moderate excess generation
- Small businesses
- Users who want both savings + income
3. Net Plus: Maximum Export Strategy
How It Works
- All electricity generated is exported to the grid
- You are paid for every unit generated
- Your consumption is billed separately
This turns your solar system into a power generation business
Key Benefits
- Continuous income stream
- Ideal for large systems
- No dependency on personal usage patterns
Limitations
- You still pay for your own electricity usage
- Requires high generation capacity
- Needs strong financial planning
Best Fit For:
- Commercial buildings
- Factories
- Large rooftops with high generation potential
Sri Lanka Specific Reality: What Actually Influences Your Decision
Choosing the right scheme isn’t just about preference; it depends on:
- Your Daytime Electricity Usage
- High daytime usage → Net Metering works well
- Low daytime usage → Net Plus may be better
- Your System Size
- Smaller systems → Net Metering
- Larger systems → Net Accounting / Net Plus
- Electricity Tariff Slabs – Higher tariffs mean:
- Greater savings from self-consumption
- Faster ROI under Net Metering
- Roof Space & Generation Potential
- If you can generate more than you consume, export strategy becomes critical.
Real-World Scenario Comparison
Let’s simplify this with an example.
- Monthly generation: 1,000 units
- Monthly usage: 700 units
- 700 units used → bill offset
- 300 units exported → credit
- Very low bill
- No direct income
- 700 units used → bill reduced
- 300 units sold → paid at export rate
- Lower bill + some income
- 1,000 units sold → income
- Full electricity bill paid separately
- Income stream, but depends on tariff differences
The “best” option depends entirely on your usage vs generation ratio.
Common Mistakes to Avoid
- Choosing a Scheme Without Analysing Usage
- This is the most common and costly mistake.
- Oversizing Systems Without a Strategy
- More panels ≠ more savings unless aligned with the right scheme.
- Ignoring Future Needs
- Your usage may increase (EVs, AC, appliances).
- Assuming One Scheme Is “Best”
- There is no universal answer—only what fits your situation.
Expert Recommendations
To maximise your solar returns:
Start With a Load Profile Analysis
Understand:
- When you consume electricity
- How much you consume
Match System Size to Scheme
- Design your system around your financial strategy.
Consider Hybrid Future Options
- Battery storage may become more relevant in coming years.
Work With Data, Not Assumptions
Simulation tools can predict:
- Savings
- Export income
- Payback period
Quick Decision Guide
If you want a simplified rule of thumb:
- Use most of your power during the day? → Net Metering
- Generate slightly more than you use? → Net Accounting
- Generate far more than you use? → Net Plus
Frequently Asked Questions (FAQ)
It depends on your usage pattern. Net Metering maximises savings, while Net Plus maximises income.
Switching may be possible but not always straightforward. It’s best to choose correctly from the start.
Yes, especially for households with high daytime usage.
They can be revised, so long-term planning is important.
Often Net Accounting or Net Plus, depending on operational hours and energy demand.
The Right Scheme Can Make or Break Your ROI
Here’s the key takeaway:
Your solar panels generate energy—but your export scheme determines how that energy turns into money.
Choosing the right one can:
- Reduce your payback period
- Increase long-term savings
- Unlock additional income streams
Need Help Choosing the Right Scheme?
The best way to decide isn’t guesswork; it’s data-backed analysis.
Hayleys Solar helps you:
- Analyse your consumption patterns
- Compare scheme outcomes
- Design a system that maximises financial returns
Because solar isn’t just about installing panels; it’s about making the smartest financial decision for your energy future.
