Your monitoring data does not belong to the company that installed your system. It lives on the equipment manufacturer's servers, and you can claim direct access in an afternoon. Even if the branded app you have been using disappears tomorrow, the underlying production history sits on Enphase, SolarEdge, Tesla, SMA, Fronius, Generac, or Solar-Log infrastructure waiting for you to register. This guide gives you the sign-in address for each platform and the steps to claim your account.
Identify which inverter you have before anything else
The inverter brand determines which portal holds your data, so start there. Look at the equipment on your wall and under your panels. Enphase microinverters are small boxes tucked beneath each individual panel, paired with a white gateway called an Envoy near your electrical panel. SolarEdge uses rectangular optimizers under each panel plus one larger wall-mounted inverter. SMA, Fronius, and other string inverters are a single box, usually within ten feet of your main service panel.
If you cannot tell from looking, the brand and model are listed on your installation contract, your building permit, or any system-overview sheet your original installer left behind. Take a clear photo of the manufacturer's label on the unit itself. It shows the serial number you will need to claim the account. Write that serial down somewhere outside the installer's app, because if their portal is shut off you may not be able to retrieve it later.
How to claim an Enphase Enlighten account
Enphase has the most homeowner-friendly transfer process in the industry, and it is a self-serve flow. Go to the Enlighten sign-in page, create a homeowner account with your email, then choose Add System and enter your Envoy serial number. If the system is currently tied to your installer, Enphase will prompt you to upload proof of ownership: a permit, interconnection agreement, or utility bill works.
Approval typically lands in one to three business days. If the self-serve flow stalls, contact Enphase through their homeowner support page and explain that the company that installed your system has closed. They handle that scenario routinely. We link to the support page rather than printing a phone number, because published support numbers change and a wrong one costs you an afternoon.
A common scare: Enlighten shows the system offline, and the homeowner assumes the panels stopped producing. Usually they did not. The Envoy lost its internet connection while the microinverters kept generating kWh. Check the LED on the Envoy: solid green means connected, blinking green means producing but offline, solid red means a hardware problem. A blinking-green Envoy is making power; you just cannot see it remotely yet.
How to claim a SolarEdge monitoring account
The SolarEdge flow is similar. Create a homeowner account at the SolarEdge monitoring sign-in, then use Add Site and enter the inverter serial from the label on the wall-mounted unit (not the optimizers). If the site is registered to an installer, click Request Site Ownership Transfer. SolarEdge sends an email to the installer's account, and if no one is left to approve it the request times out after a few days.
When the auto-flow stalls, open a ticket through the SolarEdge system owner support center, which also carries their current regional contact numbers. Bring your serial number, address, and a single piece of ownership proof. Say that the installer is closed and ask for the orphaned-system escalation path. Your full historical production stays in the SolarEdge cloud throughout. Nothing is lost in the transfer. SolarEdge also documents the account creation steps and a first-time login walkthrough if you have never signed in before.
If you have a Tesla system
Tesla systems are monitored in the Tesla app rather than a separate web portal, which changes what recovery looks like. Access is tied to the Tesla account the system is registered to, so the question is not which website to visit but whose account holds the system. Tesla documents how to manage access to an energy system and a separate ownership transfer process for when the system changes hands.
Two situations come up often for orphaned homeowners. If a Tesla inverter was installed by a company that has since closed, Tesla has a registration path for the inverter itself. If the system is on a lease or a power purchase agreement, the account may sit with the party that owns the system rather than with you, and the transfer request goes through them.
If your system was installed by SunPower
SunPower customers are the largest orphaned population in the country, and their monitoring moved rather than disappeared. The mySunPower app became SunStrong Connect, run by SunStrong Management, whose help center describes the app as being for former SunPower customers only. If your old app stopped loading, the first step is checking whether your system now lives there rather than assuming the data is gone.
Equipment matters here too. Many SunPower systems run on Enphase microinverters underneath the SunPower branding, which means the Enphase path above may also be open to you. Check for a gateway near your electrical panel before deciding which portal to chase.
The rest of the directory
The remaining platforms follow the same pattern. Register a homeowner account, attach your inverter or gateway serial, and contact support if an installer account is blocking the transfer.
Sunny Portal
SMA runs two portals, and which one holds your data depends on the age of your equipment. Newer systems live on Sunny Portal powered by ennexOS at the address above. Older systems stay on the classic Sunny Portal login. SMA publishes a registration walkthrough in its manual library. If neither login is recognized, start at the SMA America product page for current support routing.
Solar.web
Fronius handles the orphaned case directly. They publish a quick guide called assigning an account to an existing system on Solar.web, which is exactly the move you need when the system is registered to a company that is no longer answering. Their Solar.web support hub carries current contact routing.
PWRview
Generac homeowner accounts live at the address above, which Generac's own PWRview knowledge base names in its account-troubleshooting article. Their PWRview support site holds the rest. PWRcell battery owners may also have a separate sign-in at pwrcell.generac.com, so check both if one does not recognize you.
WEB Enerest
Solar-Log is the outlier worth flagging. It is a physical data logger that sits in your garage or electrical room, often paired with an SMA, Fronius, or ABB string inverter. Its cloud service, WEB Enerest, runs on regional portals rather than one global address, so the sign-in page your installer used may be a country-specific or partner-specific host. Start from the product page above to reach current portal routing rather than guessing at a login URL.
Because the logger stores data locally, you can sometimes reach a working dashboard by typing its IP address into a browser on your home network, even when the cloud portal is unreachable. Avoid factory-resetting the device before you have spoken to Solar-Log support. A reset can wipe your local production history.
If your inverter has no homeowner portal at all
Some systems were never set up for homeowner monitoring in the first place. Older string inverters from brands that have exited the US market, systems where the installer used a third-party gateway that stopped reporting, and equipment whose manufacturer has since closed all land in the same place. There is no account to claim because there is no consumer service behind it.
You are not stuck. A separate energy monitor installed at your electrical panel measures production and household consumption independently of the solar equipment, and it reports to its own app. It does not read your inverter's error codes, so it will not tell you why a string is down, but it answers the daily question of whether the system is producing and how much. A licensed electrician or solar service contractor installs one in a short visit.
Your utility is the second source, and it costs nothing. Most utilities publish interval data in the online account portal, which shows what you exported and imported hour by hour. That data is enough to spot a system that stopped producing, and it is the record a service contractor will ask for when reconstructing what your system was doing before the app went dark.
What to do if you have lost access completely
If the branded app is gone, your login is rejected, and you never set up a manufacturer account, you can still recover. Start by physically locating your serial numbers. Photograph the label on your inverter or Envoy. The serial is your master key with any manufacturer support team. For Enphase the Envoy gateway serial matters, not the per-microinverter serials. For SolarEdge it is the wall-mounted inverter label, not the optimizers.
Then call the manufacturer directly. Tell them your installer has closed and you need direct homeowner access. Every major brand has handled this routinely since the 2023 to 2026 installer insolvencies, and they have a documented process. Be ready to send one ownership document: your installation contract, building permit, utility interconnection agreement, or a recent utility bill in your name.
Even if the cloud history appears lost, two backup sources usually survive. Your utility bills contain the monthly net kWh imported and exported, which a service contractor can use to reconstruct an approximate production curve. And most inverters keep recent production data in onboard memory that a qualified service contractor can read on-site with the manufacturer's service tools.
The most reassuring thing to remember while you sort this out: a dark monitoring app is not a dead system. Walk outside in the middle of a sunny afternoon and look at your utility meter. If the net meter shows credit, or the display is running in reverse, your panels are producing kWh regardless of what any portal is or is not telling you.