Aeternus Power

Aeternus Power in California: what we will offer and how to join the waitlist

Aeternus Power opens its California office on December 1, 2026, and we are arranging a home solar power purchase agreement (PPA) for homeowners there. It is not available yet: it will follow once a provider is signed, and we will not give a date before then. If you would like us to contact you when it is ready, register your interest now.

Who is Aeternus Power?

Aeternus Power is an independent energy company based in Madrid, working in Spain and Portugal, launching in Türkiye and now opening in California. We work out what a home or a business site can produce and the best way to pay for it, then bring in vetted builders and financing partners and stay involved until the system is switched on. We never own the systems we arrange.

What will we offer homeowners in California?

A home solar PPA. A financing partner would own the system on your roof and a licensed installer would fit it. You would pay only for the power it makes, at a price per kWh set in the contract, with any yearly increase written into the contract from the start and nothing to pay upfront. The provider would look after the system for the length of the contract.

We would first check whether your home is a good fit, using your bill, your hourly usage and your roof, and tell you plainly if it is not worth it. How these contracts work in general, from the escalator to selling your home, is explained in solar PPAs for California homes.

Why a PPA, and not a sale?

Because the numbers changed. Since January 2026 there has been no federal tax credit for homeowners who buy a system, while a company that owns one on your roof can still claim a business credit if the system is in service by the end of 2027, or its construction began by July 4, 2026. Under net billing, power you export also earns far less than power you buy, so a system pays best when it is sized to what the home uses, and that is the size we would look for.

A PPA also leaves monitoring, maintenance and repairs with the provider for the 20 to 25 years of the contract. The trade is a long agreement with any yearly increases set in advance, which is why we want every term in front of you, in writing, before you decide.

What will be in writing before you sign?

Everything that costs you money. The Solar Energy System Disclosure Document on the front page would show the total cost, including the cost of the power, and its supporting pages a bill-savings estimate for the first 12 months built on your own hourly usage. The contract would set out the price per kWh, any yearly increase, the term, who maintains the system, what happens if you sell the house and any buyout terms, in the language we spoke with you.

When will the PPA be available?

We do not have a date, and we will not guess one. The office opening on December 1, 2026 is set; the PPA depends on signing a provider. Registering your interest does not commit you to anything, and when we can make an offer, we will contact everyone who registered.

What should you prepare?

Nothing is needed to register. If you want to be ready when we call, gather these:

  • A recent utility bill, showing your utility, your rate plan and how much power you use.
  • Twelve months of hourly usage, which you can usually download from your utility’s online account with the Green Button “Download My Data” tool. Savings estimates on the official disclosure should be based on it.
  • Confirmation that you own the home and its roof. The system sits on the roof, so the owner signs.
  • The roof’s age and condition. A contract runs 20 to 25 years, so a roof that needs replacing soon is better replaced first.
  • Your homeowners association’s approval process, if you have one. California’s Solar Rights Act lets associations set reasonable rules but not ban solar, and an application not denied in writing within 45 days is deemed approved, unless the delay comes from a reasonable request for more information.
  • Your plans: an electric car or a heat pump changes how much power the home uses and when, and a battery changes when it draws from the grid.

What happens after you register?

We keep your details and contact you when the PPA is available. From there, the steps would be these: we check whether your home is a good fit; if it is, you receive a written offer from a licensed contractor or a registered salesperson working for one, since in California only they may quote; you take the time you need to read the contract, its disclosure and the CPUC’s Solar Consumer Protection Guide; and if you sign away from the contractor’s place of business, you can still cancel within three business days, or five if you are 65 or older.

Choosing a provider well matters as much as the price; our guide on how to choose a home solar company in California lists the checks we would expect you to make on us too.

How do you register your interest?

Before you do, the other guides in this series cover whether home solar still pays in California and home batteries under net billing. When you are ready, use the waitlist form at the end of this page, or the one on our page for homeowners: your email and ZIP code are enough. That is all it takes to register your interest, and we will contact you when the PPA is available.

Questions

Is the home solar PPA available now?

No. Our California office opens on December 1, 2026, and the PPA will follow once a provider is signed. We do not have a date yet.

Does registering commit me to anything?

No. It only asks us to contact you when the PPA is available. There is nothing to sign and nothing to pay.

Do I need to own my home?

Yes, or have the owner’s agreement. The system sits on the roof, and the owner of the home signs the contract.

Which areas and utilities will it cover?

We will confirm that when the provider is signed. Register with your address, and we will tell you whether your home is included.

Can I get a battery with it?

That depends on the provider we sign, and we will say so clearly when we can make an offer. Our battery guide explains what a battery does under net billing.

Sources

  • CPUC: Net Energy Metering and Net Billing (net billing tariff, export credits, nine-year legacy, required time-of-use rates): https://www.cpuc.ca.gov/industries-and-topics/electrical-energy/demand-side-management/customer-generation/net-energy-metering-and-net-billing
  • IRS Fact Sheet FS-2025-05: FAQs on the modification of sections 25C, 25D and other credits under Public Law 119-21: https://www.irs.gov/EnergyCreditFAQs
  • IRS Notice 2025-42: Sections 45Y and 48E beginning of construction for wind and solar facilities: https://www.irs.gov/pub/irs-drop/n-25-42.pdf
  • Grant Thornton: Energy incentives under OBBBA, what you need to know (25D termination, 48E for solar, leased residential property): https://www.grantthornton.com/insights/alerts/tax/2025/insights/energy-incentives-under-obbba-what-you-need-to-know
  • CPUC: California Solar Consumer Protection Guide (leases and PPAs, escalators, selling your home, questions to ask): https://www.cpuc.ca.gov/industries-and-topics/electrical-energy/demand-side-management/customer-generation/california-solar-consumer-protection-guide
  • CPUC: California Solar Consumer Protection Guide, published October 2025 (PDF): https://www.cpuc.ca.gov/-/media/cpuc-website/divisions/energy-division/documents/solar-guide/2025-versions/solarguide25.pdf
  • CSLB: Solar Energy System Disclosure requirements (front page, 16-point bold, language of the sales presentation): https://www.cslb.ca.gov/Consumers/Solar_Requirements.aspx
  • California Business and Professions Code section 7169 (solar energy system disclosure document): https://california.public.law/codes/business_and_professions_code_section_7169
  • CPUC Resolution E-5364 (adopted March 13, 2025): inputs and assumptions for bill savings estimates in the CSLB Solar Energy System Disclosure Document: https://docs.cpuc.ca.gov/PublishedDocs/Published/G000/M559/K800/559800004.PDF
  • CSLB: Solar Smart (license checks, salesperson registration, contracts, complaints): https://www.cslb.ca.gov/consumers/solar_smart/
  • CSLB Contractor Newsletter, Spring 2020: advisory on lead generation and solar broker services: https://web.cslb.ca.gov/Resources/Newsletters/ContractorNewsletterSpring_2020.pdf
  • PG&E help: How do I download my energy usage data? (Green Button, Download My Data): https://help.pge.com/s/article/How-do-I-download-my-energy-usage-data-Residential-customers?language=en_US
  • California Civil Code section 714 (Solar Rights Act: restrictions on solar energy systems): https://california.public.law/codes/civil_code_section_714

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