Monitoring
How to find your solar site ID (SolarEdge, Enphase, SunPower, Tesla)
Updated October 19, 2026.
A "site ID" is the number the monitoring company uses for your system. You need it to take over your monitoring after an installer closes, to file a warranty claim, or to get a straight answer from support. Where it lives depends on the brand of inverter on your wall.
Where to find it
- SolarEdge: the monitoring site ID is in the SolarEdge app under the site details. You'll also want the inverter serial number from the label on the inverter, because SolarEdge asks for both when you request an ownership transfer.
- Enphase: the system ID shows in the Enphase app and in the web dashboard for your system. The gateway (IQ Gateway or Envoy) also carries its own serial number on its label.
- SunPower Equinox: most use Enphase microinverters and a SunPower PVS gateway. The PVS serial number on the gateway label is what identifies the system; the monitoring account sits with the company that took over SunPower's app.
- Tesla: the Tesla app lists the system on your account, and Tesla support finds it by your account and address.
Not sure which brand you have? The brand guide shows what's on the wall and how to get the monitoring account into your own name.
Why it matters
If the monitoring was set up under your installer's account and the installer is gone, you may be a guest on your own system. The site ID and the serial numbers are what prove which system is yours. If the app shows the system down and nobody answers, here is what gets a written answer.
Found the number? Check the system next. The free production check compares what your system has made with what one like it should make at your address. No account, no sales call.
If it's coming up short and nobody answers, I write the dated letter for you from your own papers: $99 flat, ready in 3 business days, and you approve and send it yourself.
“After the letter was sent, it was mere days that they got back to me with a much more positive email looking into all our issues causing the total system to be down.”
Tami B., SunStrong customer
What happened next: after her letter, SunStrong answered in writing within days, saying it would put billing and collections on hold, cancel auto-pay and set up a deferment while it looks into the system. See page 1 of her letter.
What this page isn't
It isn't legal advice. Agreements and state rules differ, and your own agreement wins over anything general here. I prepare documents at your direction; you review, sign and send them yourself.