Sonoma Energy(623) 624-6478

Phoenix · Scottsdale · Arizona

Build your solar plan from your actual energy use.

Enter the basics from a recent utility bill. You’ll immediately receive a preliminary solar and battery plan to review, save, or discuss with Sonoma Energy.

A solar plan starts with the roof. · Illustrative Sonoma Energy project footage.

Ways to move forward

Choose the payment path that fits your home.

Choose an option, enter your bill, and see an example of your new costs.

Interactive planning example

What could your new bill look like?

Planning example only. We confirm your price and savings after reviewing your bill.

Assumed solar system size
Approximate panel count
Battery storage capacity
Continuous battery output

Powerwall 3 provides up to 11.5 kW continuous AC output per unit. An expansion adds storage capacity; power output stays the same. Final output depends on the approved design and utility settings.

APS sizing uses a $310/month reference with 9.84 kW of solar, about 110% annual energy coverage and favorable south-facing production of 1,728 kWh per installed kW per year. Bill-based scaling is approximate; actual usage, roof direction and shade determine final size. Other utilities use a separate blended-rate assumption.

Palmetto LightReach example Reference first-year cost

Worked example: At a $310/month bill, the reference is 9.84 kW solar with your selected Powerwall package. The estimated package payment includes the selected solar and battery equipment. These are preliminary planning estimates, not live lender quotes.

Through Our World Energy · choose the payment structure you want us to compare.

Fixed: your scheduled lease payment stays level. Your remaining utility bill can change.

Both options require a design-confirmed quote and program approval. A lower starting payment is compared against the fixed offer for the same design; it is not guaranteed to cost less over the full term.

Solar + battery lease / month · year one
Assumed remaining utility bill
First-year monthly savings
Solar + battery lease / month · year 10

Calibrated to the supplied 9.84 kW Aurora examples: one Powerwall is $193.55 fixed or $167.27 initially; two Powerwalls are $259.55 fixed or $221.17 initially; one Powerwall plus expansion is $241.55 fixed or $206.47 initially. Lower-starting payments increase 1.99% annually. Package estimates adjust with the modeled system size and selected payment structure. This approximation does not reproduce Aurora’s project-specific pricing or approval. The $51.50 utility assumption comes from the one-Powerwall example ($618/year). For two Powerwalls or Powerwall plus expansion, the model assumes 50% lower grid-energy charges, keeping fees and demand charges unchanged. This storage benefit is an editable scenario, not a verified Aurora utility estimate. It is not an hourly utility forecast. Other utilities require a confirmed quote. The comparison below applies separate utility-rate assumptions through 2028.

Compare the full lease payment plus the remaining utility bill with the original bill. The 1.99% option starts lower in this model, but its lease payment rises annually. Neither option guarantees savings.

What if APS costs rise?

Compare average monthly costs through 2028 for your selected payment option.

Monthly cost scenario · upfront costs shown separately above
YearAPS without solarSolar paymentRemaining APSCombined costSavings / month

The 3% defaults are illustrative assumptions, not approved APS increases. APS has proposed annual adjustments that could move rates up or down; the amount and timing require approval. APS rate case · Commission timeline

2026 is the current-bill baseline. This simple scenario compounds each increase over a full year, keeps usage and solar production constant, and increases all assumed APS charges after solar while holding export credits constant. Actual charges may change differently, including the solar grid access charge. Fixed lease and loan payments stay level; the lower-starting lease rises 1.99% annually. Cash and prepaid rows exclude upfront costs and do not show investment payback. No increases after 2028 are assumed here.

How we estimate this · adjust assumptions (Optional)

APS sizing is calibrated to the supplied 9.84 kW / $310 bill reference with about 110% annual coverage and favorable south-facing production. Other utilities use 110% coverage and a blended-rate assumption. Purchase examples reflect the selected system size, installer and equipment package. These are planning prices, subject to final installed scope. LightReach pricing comes from the project-specific solar-rate table, equipment eligibility, annual production yield and selected battery package. We confirm the complete package price and payment after design. Final payments for all equipment configurations require confirmation. Annual coverage does not predict hourly grid usage.

LightReach installer: Our World Energy.

APS bill assumptions

These editable amounts are planning assumptions, not current APS tariff rates or a forecast. Added storage reduces the assumed grid-energy portion; it does not remove fees or automatically reduce demand charges. Actual savings depend on surplus solar, evening usage and battery operation. Two Powerwalls and one Powerwall plus expansion use the same storage assumption; backup power capability differs.

Estimated APS amount due
Credit balance in this example

New RCP applications September 1, 2026–August 31, 2027: 5.554¢ per exported kWh. Qualifying initial rates apply for 10 years from interconnection, subject to program requirements. Existing systems may have different rates. APS RCP tariff

Demand depends on your rate plan and highest on-peak hour. Export credit treatment depends on your solar rider and applicable rate; credits are not automatically equal to the retail price. Batteries can shift energy use, but do not guarantee a zero bill or eliminate fixed charges. Summer and winter bills may differ significantly. We verify all estimates against your actual APS bill and usage before a proposal. APS rooftop solar information

Displayed upfront estimates include the selected solar and battery package. Final installed scope and program eligibility are confirmed in your proposal. The prepaid example discounts solar only; battery discount eligibility requires confirmation. Cash discounts are confirmed in writing. Qualifying Arizona solar property-tax treatment is not an upfront cash rebate; income-tax incentive eligibility requires review.

Ask about current cash pricing. Final price may be adjusted when distributor equipment costs, availability, and your home's scope are confirmed; any discount appears in writing on the proposal.

Examples are not quotes or guaranteed savings. Final costs depend on your home, usage, utility plan, equipment and program approval.

Understand your options

Which solar payment option fits you?

Start with your budget, whether you want to own the equipment, and how you feel about payments changing over time.

Why choose a fixed lease payment?

Choose fixed if predictable solar payments matter most. The scheduled lease payment has no annual increase. Compare its starting payment with the escalating offer for the same system; your utility charges can still change.

Why choose the lower starting payment?

A 1.99% annual escalator may offer more room in your budget in year one. The tradeoff is a lease payment that increases every year. Compare year-one savings, later-year payments and total lease payments before choosing. Utility-rate increases are assumptions, not promises.

Why buy with cash instead of leasing?

Cash may suit you if you want to own the system and can comfortably pay upfront. There is no monthly solar loan or lease payment. Compare the full installed cost, written warranties and remaining utility costs with the lease offers.

Why choose a prepaid lease?

A prepaid lease may suit you if you prefer one upfront lease payment rather than monthly solar payments. It is a lease, so ownership and contract terms differ from a cash purchase. Confirm availability, the actual discount, service responsibilities and end-of-term terms in the written offer. The 30% solar discount shown here is an illustration, not a guaranteed offer or bill reduction.

Why finance the system with a loan?

A loan lets you purchase the system while spreading payments over time. Compare APR, finance fees, total financed price and the payment schedule—not just the advertised interest rate. Ask whether deferred interest or a planned lump-sum payment affects the quoted payment. Approval and terms depend on the buyer and project.

Will I still have an APS or other utility bill?

Yes, plan for remaining utility costs. Solar production, hourly usage, exports, battery operation and your utility plan determine the amount. Compare your solar payment plus your remaining utility bill against your current bill. An annual energy offset does not mean a zero utility bill.

Do I need a battery, and how are savings calculated?

A battery may help shift solar energy to later hours and support selected loads during outages. Capacity and backup needs require a load review; more batteries also increase project cost. Monthly savings are your current utility cost minus the solar payment and remaining utility bill. Some options may increase total costs. We show the calculated difference rather than assuming a savings percentage. Cash and prepaid options also have a separate upfront cost that must be included when comparing overall value.

What should I check if I may sell my home?

Review the lease transfer or buyout terms, or the loan payoff requirements, before signing. Ask who owns the equipment, who handles maintenance, what warranties cover and what happens at the end of the agreement. Your written contract controls these details.

The instant examples above use Arizona assumptions. Other states receive a market-specific review.
You can change this later. Selecting an option does not commit you to a program.
PDF, JPG, or PNG. Redact account numbers if you prefer. The instant estimate uses the bill amount you enter; Sonoma reviews the document afterward.

This tool provides a preliminary planning range—not a final engineering design, proposal, tax opinion, or guaranteed savings quote. Final recommendations depend on interval usage, rate plan, roof conditions, shade, equipment, utility rules, financing, and site verification.

Sonoma Energy · Preliminary Plan

Your solar starting point

Estimated usageannual kWh range
Solar targetpreliminary DC range
Panel countpanel equipment depends on payment path
Annual productionestimated Arizona output
Target offset85–100%before site and utility review
Battery starting point
Next step: Sonoma Energy verifies the uploaded bill, rate plan, roof space, shade, main electrical service, and program terms before turning this range into a proposal.
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Your request and utility bill were saved.Sonoma Energy has the information needed to follow up. Booking a consultation is optional.

Estimates use the entered monthly bill, a preliminary blended utility-rate assumption, and a typical Arizona production range. Actual consumption and economics cannot be determined from bill cost alone.