By Claire WhitakerUpdated November 2026
Net energy metering Hawaii has changed significantly in recent years, and homeowners now face a choice between the older full-retail credit approach and the current customer self-supply and net billing framework. For most homeowners who already have a grid-tied system, the newer export-rate structure with a battery is the better fit, while a smaller solar-only system that uses most of its output on site may still come out ahead with a simpler setup. Read on for a side-by-side look at both options and what each means for your monthly bill.
Net Energy Metering vs Net Billing at a Glance
Before comparing criteria one by one, here is the basic picture. The legacy option credited exported kilowatt-hours at close to the retail rate, which made the math very generous. The current framework pays a time-varying export rate that is much lower during peak hours, so when and how you use your solar power matters more than it used to.
| Criterion | Legacy Net Energy Metering (Option A) | Current Net Billing / Self-Supply (Option B) |
|---|---|---|
| Credit for exported energy | Near retail rate, applied as bill credit | Time-varying export rate, usually well below retail |
| Best time of day for exports | Any time, value is roughly flat | Midday, when rates are lowest, so export matters less |
| Battery storage value | Modest, mainly for backup | High, lets you shift usage to evening peak hours |
| Sizing strategy | Oversize to export and earn credits | Size to self-consume, with battery support |
| Bill predictability | Simpler, credits roll forward | More variable, depends on usage timing |
| Monitoring needs | Basic meter reads | Interval data and an energy monitor are useful |
| Eligibility for new systems | Generally closed to new applicants | Standard option for new interconnections |
Credit Value for Exported Energy: Winner, Option A
Under legacy net energy metering, every kilowatt-hour your panels sent to the grid was credited at close to what you would pay to buy it back. That made the economics of an oversized system very attractive. If your roof produced more than you used, the surplus effectively bought you power later at full value.
Under the current framework, exported energy is valued at the utility’s export rate, which is set by time of day. Midday exports, when solar output peaks and rates are lowest, earn far less than the same kilowatt-hour would cost to buy back in the evening. For this criterion, Option A wins clearly for anyone who can still access it, because the credit per kilowatt-hour is substantially higher.
Battery Storage Value: Winner, Option B
When exports are worth less, the gap between what you pay at night and what you earn at noon becomes the central question. A battery lets you store midday solar and use it during the early evening peak, when the utility’s rates are highest. That shift is where most of the value now sits.
Battery storage was a nice-to-have under legacy metering, mostly for backup during outages. Under the current structure, a battery can turn a marginal system into a reasonable one. Option B wins this criterion, and the battery is the reason it does. Consult a qualified installer and your utility’s current tariff sheet before committing, since rate schedules change.
System Sizing Strategy: Winner, Option B
Under legacy metering, many owners sized systems to match or exceed their annual usage, knowing exports would be credited generously. Under net billing, the goal shifts toward self-consumption. A system sized to cover your daytime load, with a battery to carry you into the evening, usually produces better results than one sized to export heavily.
A practical approach is to pull twelve months of interval data from your utility, identify your daytime and evening loads, and size panels to cover daytime use plus battery charging. Oversizing for exports rarely pays under the current rate structure. Option B wins because self-consumption is now the source of most of your savings.
Bill Predictability and Simplicity: Winner, Option A
Legacy net energy metering was simpler to live with. Credits accumulated on the bill, you could see the balance building, and month-to-month swings were easier to explain. Owners often report that the net billing structure takes more attention, especially in the first year, as they learn how their usage pattern interacts with export timing.
If you want a low-maintenance arrangement and you have access to the older program, Option A wins on simplicity. Use your utility’s billing portal to check how credits are applied each cycle, because misreadings are common when the rate structure changes.
Monitoring and Data Needs: Winner, Option B
Because the current framework rewards timing, you need visibility into when your system produces power and when your home uses it. Interval data from your utility, paired with a home energy monitor or the inverter’s app, lets you see whether a battery schedule is paying off. Under legacy metering, a basic meter reading was enough to confirm credits were accruing.
For this reason Option B wins on monitoring, though the extra effort is usually worthwhile. Our guide to Net Energy Metering Application: A Step-by-Step Guide for Homeowners covers what documentation to keep through the process.
Eligibility for New Systems: Winner, Option B
This criterion is less a judgment about quality and more about access. Legacy net energy metering has generally been closed to new applicants, which means most homeowners installing solar today are working under the current framework. If you already hold legacy credits, keep them, but plan new projects around the rules that apply to new interconnections.
Because of this, Option B is the only realistic choice for most new projects. Confirm current eligibility directly with your utility before signing any installation contract.
Which Should You Choose?
Your best option depends mostly on whether you already have legacy credits and how your household uses power.
- Choose legacy net energy metering if you already have an interconnection under the older program and want to keep the generous export credit.
- Choose the current net billing option if you are installing a new system, since this is the standard path for new applicants.
- Add a battery if your household uses a lot of power in the early evening, because storage moves solar energy into your highest-rate hours.
- Size for self-consumption if you are new to solar and your daytime load is steady, rather than building a large export-focused system.
- Prioritize monitoring if you enjoy tracking data and want to tune battery schedules over time.
- Keep it simple if you are away during the day and mostly use power at night, where a modest system with good documentation may suffice.
Products that fit these two paths:
For a legacy-style setup, a basic grid-tied inverter pairs well with a standard production meter. Look at the Enphase IQ8 Microinverter for module-level output tracking. View on Amazon
For the current framework, a battery paired with a monitoring system is the more common choice. The Tesla Powerwall 3 is a widely installed home battery. View on Amazon
For monitoring, the Emporia Vue 3 Energy Monitor gives circuit-level data. View on Amazon
FAQ
Can I still join legacy net energy metering in Hawaii?
Generally no. The legacy program has been closed to most new applicants, so new systems are typically interconnected under the current net billing structure. Contact your utility to confirm your specific eligibility before you begin.
Is a battery worth it under the current rules?
For many homeowners, yes, because storage lets you use midday solar during the evening peak when rates are highest. Whether it pays off depends on your load profile and the battery’s cost, so run the numbers with an installer.
What happens to credits I already have?
Existing bill credits generally remain on your account under the rules that applied when they were earned. Review your monthly statement to confirm how they are being applied.
Should I oversize my system to export more power?
Usually not. Because export rates are lower under the current structure, oversizing rarely adds as much value as covering your daytime load and charging a battery.
Where can I find my utility’s current export rate?
Your utility publishes its tariff schedules and time-of-use rates on its website. Rates change, so check the current schedule before making decisions, and consult a qualified professional for personal advice.
Conclusion
Net energy metering Hawaii is no longer a single option for most new solar owners. Legacy credits were more generous, but they are largely closed to new applicants. The current net billing framework rewards self-consumption and battery storage, so a system designed around your daytime and evening loads will usually perform best. Verify eligibility and current rates with your utility before you buy equipment, and plan your system around how your household actually uses power.
Related reading
- Virtual Net Energy Metering: How It Works and How to Get Credited
- SCE Net Energy Metering Program: How It Works and Who Qualifies
About Claire Whitaker
Claire Whitaker is part of our editorial team and reviews and edits our home solar guides, checking product details against manufacturer specifications and owner feedback.
