ID · Solar

Solar quotes in Nampa, ID.

One real quote from a vetted local Nampa installer, sized to your roof, your bill, and every federal + state rebate you qualify for.

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8 kW
Average system size: $2.70/W
Average cost (USD): 13 yrs
Average payback: 50+
Local installers

Why solar in Nampa

When exported electricity is worth 14.06 cents on a summer afternoon and 0.95 cents on a November morning, a battery stops being a resilience purchase and becomes a timing instrument. Idaho Power season and time-varying export credits create one of the widest spreads in the country, and that spread is precisely what storage and load shifting exist to exploit.

A spread this wide changes the storage case

Recent Idaho Power export credit rates have run at approximately 14.0598 cents per kWh for summer on-peak exports against 0.9540 cents for all exported energy outside summer.

In most states a battery earns its keep by converting a low export rate into a retail-rate offset. In Idaho it can also convert a low export rate into a high export rate, by holding generation until the summer on-peak window.

That is a second, additive mechanism that most states do not offer, and it is worth asking an installer to model explicitly rather than assuming a generic storage benefit.

It is also seasonal. The high rate applies in summer on-peak hours only, so the value a battery captures is concentrated rather than spread evenly across the year.

What a real model of this looks like

Ask for the export volume broken out by season and period: summer on-peak, summer off-peak, and non-summer, with the applicable rate against each.

Ask how the battery dispatch was modelled. A battery that discharges into summer on-peak export hours is doing something quite different from one that simply covers evening household load.

Ask what round-trip efficiency the model assumed, since a battery does not return everything put into it, and losses matter more when the arbitrage is being counted precisely.

Ask what the model assumed about the export rates over the system life, given they are updated annually and Idaho Power has proposed substantial reductions to the average.

The free version, before the paid one

Self-consumption is unaffected by the export spread entirely, because electricity you use as it is generated offsets a retail purchase rather than being exported at any rate.

So shifting flexible loads into daylight remains the first move: dishwasher, laundry, pool pump and electric vehicle charging all convert exports into retail-rate offsets at no cost.

That matters most outside summer on-peak hours, when an exported kilowatt hour is worth under a cent. In those periods, using the electricity yourself is worth roughly fifteen times exporting it.

Ask for the projection with and without load shifting assumed, so you can see how much of the improvement is available without buying anything.

Rebuilding the estimate from what is confirmed

The 30 percent federal Residential Clean Energy Credit under Section 25D expired for property placed in service after December 31, 2025, so a cash or loan purchase receives no federal tax credit on the panels or the battery.

The Idaho Residential Alternative Energy Tax Deduction remains as a deduction rather than a credit, worth the deducted amount multiplied by your marginal state rate.

What exists on the utility side is retail-rate offsetting for self-consumption and season and time-varying export credits for the rest.

Ask for the system modelled with and without storage, with export volumes and rates broken out by season and period and round-trip losses included.

Incentives & rebates

Net metering: Idaho Power real-time net billing with season and time-varying export credits

Idaho Power moved non-legacy on-site generation customers to real-time net billing following Case IPC-E-23-14. The structure has two halves. Generation your household consumes on site as it is produced continues to offset your usage, which is the most valuable outcome and is unaffected by the export rate. Generation exported to the grid is compensated per kilowatt hour at an avoided-cost-based export credit rate that varies by season and by time of export. What makes Idaho unusual is the size of that variation. Recent rates have run at approximately 14.0598 cents per kWh for summer on-peak exports, 1.7682 cents for summer off-peak, and 0.9540 cents for all exported energy outside the summer season. That is roughly a fifteenfold spread between the best and worst hours, far wider than in most time-varying tariffs. The consequence is that when you export matters far more here than how much you export in total. A kilowatt hour delivered to the grid on a summer afternoon is worth about fifteen times one delivered on a November morning, so a battery that can hold generation for the summer on-peak window is doing something genuinely valuable, and load shifting to raise self-consumption outside summer peak hours is close to free money. The export credit rate is updated annually, and Idaho Power initial filing proposed reducing the average annual rate from around 6.2 cents per kWh to just under 2.5 cents, so confirm the current published figures rather than relying on an older guide. Rocky Mountain Power in eastern Idaho and Avista in the north operate their own arrangements.

Related Idaho resources

Idaho solar incentives & rebates Full breakdown of federal, provincial, and utility programs.

How payback works in Idaho

System cost: $21,600
Estimated net cost: $21,600
Estimated payback: ~13.3 years
25-year net savings: ~$18,900

These figures are illustrative; your actual quote reflects your roof, sun exposure, and local utility rates.

Frequently asked questions

Is a battery worth it in Idaho?

The case is unusually strong because the export spread is unusually wide. Recent rates have run around 14.06 cents per kWh for summer on-peak exports against 0.95 cents outside summer, so a battery can shift generation between rate periods as well as into self-consumption.

How should the battery be modelled?

With export volumes broken out by season and period against the applicable rates, with the dispatch strategy stated, and with round-trip efficiency losses included. A generic storage benefit figure does not model this tariff.

What can I do without buying a battery?

Shift flexible loads into daylight. Outside summer on-peak hours an exported kilowatt hour is worth under a cent, so using it yourself is worth roughly fifteen times exporting it, and that costs nothing.

Will the export rates stay this way?

They are updated annually and Idaho Power has proposed reducing the average annual rate substantially. Ask what the projection assumed over its term and ask to see it with the export rates reduced.