Idaho Solar Incentives (2026): Net Billing Export Credits, Utility Rules, and Real Costs
In Idaho, solar savings are driven less by statewide rebates and more by your utility's tariff—especially how exported energy is credited. Use this guide to understand Idaho Power net billing, Avista net metering options, and how to compare quotes with the right assumptions.
Idaho solar at a glance
Idaho can be a good solar state, but it's a "tariff-first" market. Your results depend heavily on who serves your address—Idaho Power, Avista, or Rocky Mountain Power—and whether exports are credited at time-based rates or treated as legacy net metering.
If you only take one step before requesting bids, make it this: confirm your utility and ask installers to state, in writing, which tariff and export-credit assumptions they used.
Incentives Idaho homeowners can use
Federal Residential Clean Energy Credit status in 2026
The IRS says the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025. That matters for 2026 projects and for any proposal still showing a "30% federal tax credit" line item.
Idaho financing support: State Energy Loan Program
Idaho's OEMR administers a State Energy Loan Program that provides financing for qualifying energy-related projects; homeowners can review eligibility, terms, and repayment details directly through OEMR.
Practical takeaway: in Idaho, financing terms can change your monthly outcome more than small equipment differences, so compare loan APR, term length, and any fees as carefully as panels and inverters.
Solar compensation in Idaho
Idaho Power: Schedule 6 net billing (and legacy net metering)
Idaho Power's Schedule 6 states it is closed to new applications for net energy metering and defines net billing as the structure for systems that do not qualify as "legacy."
Under net billing, exports are credited using an Export Credit Rate (with time periods defined) and applied as a dollar credit to offset monthly charges. Schedule 6 lists example export credit rates for summer on-peak/off-peak and a non-summer rate.
Avista: net metering option (utility territory dependent)
Avista explains net metering for customer systems (noting it's for systems 100 kW or less) and describes the net meter as measuring the difference over the course of a month.
Avista's Idaho tariff Schedule 63 describes availability terms for its net metering option, including program capacity language.
Rocky Mountain Power: Schedule 136 net billing export credits
Rocky Mountain Power's Schedule 136 (Net Billing Service) states exported energy is financially credited at listed prices, and the schedule includes seasonal and on-/off-peak export credit rates (with the posted version effective Dec. 1, 2025).
Quick comparison: how exports get valued
| Utility area | Common structure for new customers | What to verify on your quote |
|---|---|---|
| Idaho Power | Net billing for non-legacy systems; export credit rate varies by time period | Which export rate table and time periods were used; whether the quote assumes TOU |
| Avista | Net metering option terms per tariff; system size guidance includes ≤100 kW | Whether the program is open/available for your address and how credits roll over |
| Rocky Mountain Power | Schedule 136 net billing with published export credit rate tables | Which schedule version was used and whether export credits are time/season based |
Example: Idaho bill math (illustrative)
Your home uses 1,000 kWh in a month and your solar produces 900 kWh.
If 600 kWh is used instantly in your home, you avoid buying that 600 kWh at your retail rate. The remaining 300 kWh is exported.
Under a net billing structure (such as Idaho Power Schedule 6 for non-legacy systems), your imported energy is billed at retail rates and exports are credited separately using the export credit rate schedule.
If you are a legacy net metering customer, the crediting mechanics can be different, and Schedule 6 explicitly distinguishes legacy net energy metering from net billing.
The takeaway: in Idaho, the value of the last "exported" portion can be very different from the value of the first "self-used" portion, so system sizing and usage timing matter.
Idaho solar costs and what changes price
Idaho pricing often swings based on roof complexity, electrical upgrades, and whether you add storage.
| Common cost driver | Why it matters |
|---|---|
| Main panel or service upgrade | Can be required to interconnect safely |
| Roof condition and complexity | Adds labor and may trigger reroof coordination |
| Snow/load and mounting details | Engineering and racking choices can change |
| Battery add-on | Increases electrical scope and commissioning |
Savings and payback in Idaho
In Idaho, payback is usually driven by tariff assumptions more than by brand-name hardware.
| Assumption | Why it matters in Idaho |
|---|---|
| Export credit rates and time periods | Net billing export value can vary by season/time |
| Your daytime usage (self-consumption) | Using solar as it's generated often saves more than exporting |
| TOU vs standard rate | Some tariffs offer TOU options that can change the strategy |
| Financing structure | Monthly payment can outweigh modeled "savings" |
Example: quote comparison pitfall (illustrative)
Quote A assumes every exported kWh is worth close to your retail rate. Quote B assumes exports are credited using the utility's export credit rate table and time periods.
In Idaho Power territory, Quote B is typically the more realistic model to start from because Schedule 6 defines export credit rates and time periods for net billing customers.
Idaho solar production and climate considerations
Idaho's seasons are a big part of the experience. Many homes see strong summer production and lower winter production due to sun angle, shorter days, and snow cover. A credible proposal should show monthly production (not just annual totals) and explain how shading and roof direction affect winter output.
System sizing guidance
Start with your last 12 months of usage (kWh) and then size to the compensation rules you'll actually live under.
Example: kWh → kW starting point (illustrative)
If your home used 12,000 kWh last year, ask installers to model a system that targets roughly that annual production first, then refine for roof limits and the way exports are credited in your territory (net billing vs net metering). Idaho Power's Schedule 6 explicitly defines net billing for non-legacy systems.
Battery sizing in Idaho
Batteries can help in two ways: backup resilience and increasing self-consumption (using more of your solar rather than exporting it). In net billing markets, that self-consumption benefit can be the bigger economic lever, depending on the export credit rate and your usage pattern.
Permitting and interconnection
Most Idaho projects follow a consistent path: site survey → design → local permit → install → inspection → utility interconnection → permission to operate.
In Idaho Power territory, customer DER systems must satisfy Schedule 68 interconnection requirements, and Idaho Power provides a customer generation application process that directs customers to permits/inspections and Schedule 68 compliance.
Example: interconnection timeline (illustrative)
A straightforward solar-only project may take several weeks from contract to install, then additional weeks for inspections and utility processing. Electrical upgrades or battery installations typically extend timelines because there are more inspections and commissioning steps.
Choosing an installer and comparing quotes in Idaho
Ask every installer to provide the same four items so you can compare apples to apples: system size (kW), estimated annual production (kWh), the exact utility tariff assumptions (including export credit rates/time periods), and a clear scope of electrical work included.
- • If you are in Idaho Power territory, have the installer point to Schedule 6 export credit rate assumptions and time periods used in the model.
- • If you are in Rocky Mountain Power territory, have the installer identify which Schedule 136 export credit table they used.
- • If you are in Avista territory, have the installer cite the applicable net metering option and confirm your eligibility and program availability.
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Idaho solar FAQs
Next steps
Get two to three quotes and require each installer to model the same scenario using your utility's actual export-credit approach. Keep assumptions consistent, then pick the proposal with the clearest scope, the most transparent math, and the strongest workmanship and support.
References
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