OwlWatt

Monitor your solar production guarantee from your iPhone, Raspberry Pi, or Mac.

OwlWatt reads your Enphase system, computes what it should produce, and documents any shortfall — so you can actually enforce your contract.

Download for iPhone Start free trial
OwlWatt app icon
$11.99 /mo · $119.99 /yr
iOS pricing · web is $9.99/mo or $107.88/yr
Download on the App Store

OwlWatt for iPhone

Native iOS app with push alerts, home-screen quick view, and one-tap claim filing. Your production data and guarantee tracking, always in your pocket.

  • Production guarantee tracking — Compare actual kWh against your contract's promised output
  • Real-time monitoring — 5-second inverter polling via your Raspberry Pi or cloud API
  • Push alerts — Instant notification when production drops below expected threshold
  • Claim filing — Generate a formatted, data-backed shortfall report with one tap
  • Restore purchases — Switch iPhones or reinstall without losing your subscription
  • Works with Enphase — Same data your installer uses, independently verified

View app screenshots →

Choose your collector

OwlWatt needs a data source to read your inverter. Three options — from dedicated hardware to fully cloud-based.

Raspberry Pi
$59 hardware add-on

Plug-and-play Pi collector reads your Enphase IQ Gateway every 5 seconds, directly over your LAN. Works even when the cloud is down. Ships pre-configured — no SSH required.

  • Highest-resolution data (5-second intervals)
  • Local-first — catches outages the cloud API misses
  • Stays online when Enphase cloud is unreachable
  • Compatible with any home network
Set up Raspberry Pi →
macOS Desktop
Free (Mac-only)

Silent menu-bar app for Mac. Reads your inverter and syncs to the OwlWatt cloud. No additional hardware required. Mac must be on when you want data collection.

  • No extra hardware
  • macOS 12+ (Monterey or later)
  • Included with any OwlWatt subscription
Download for Mac →

Windows customers: use Raspberry Pi or cloud-only.

Cloud-Only
Free (universal fallback)

No hardware, no desktop software. OwlWatt polls the Enphase Enlighten API on your behalf. Data updates every 15 minutes (API rate limits apply). Works on any platform.

  • Works on Windows, Mac, iOS, Android
  • Nothing to install
  • Lower resolution than Pi (15-min vs 5-sec)
Start cloud-only →

Not sure which to pick? Visit the setup guide →

Why solar guarantee tracking matters

Most solar installer contracts include a production guarantee. Almost nobody enforces it — because nobody has the tools to document the shortfall the way a claim requires.

OwlWatt computes what your system should produce using NREL pvlib physics models, compares that against your actual inverter data, and translates any shortfall into dollars.

$3,000–$6,000
Typical unclaimed shortfall over a 10-year guarantee period
5 minutes
To generate a claim-ready shortfall report
30 days
Free trial — no credit card needed

How OwlWatt compares

vs Enphase Enlighten vs SolarEdge Insight vs Sense vs Omnidian

Frequently asked questions

Do I need the iOS app to use OwlWatt?

No. OwlWatt works entirely in your browser at owlwatt.com. The iOS app is an optional native wrapper that adds push notifications, a home screen icon, and a faster mobile experience. Your subscription covers both — no extra charge.

Does OwlWatt work with Enphase?

Yes. OwlWatt reads directly from the Enphase Enlighten API or from a local Raspberry Pi collector that polls your IQ Gateway every 5 seconds. You get per-microinverter production data, independent expected-production modeling, and documented shortfall reports — all in one place.

Does OwlWatt work with SolarEdge?

Not yet — SolarEdge support is on our roadmap. OwlWatt today connects directly to Enphase Enlighten and the Enphase IQ Gateway. Join the waitlist at owlwatt.com for SolarEdge release updates.

What is the difference between the Raspberry Pi, macOS, and cloud-only collectors?

The Raspberry Pi collector ($59) plugs into your home network and polls your Enphase IQ Gateway directly every 5 seconds. It works even if the Enphase cloud is down. The macOS collector is free software that runs on your Mac — no extra hardware. The cloud-only option needs no hardware or software at all — OwlWatt polls the Enphase Enlighten API on your behalf. The Pi is recommended because it catches outages the cloud API misses and gives you the highest-resolution data.

Can I cancel my subscription?

Yes. Cancel anytime from Settings → Subscription in the app or on owlwatt.com. On iOS, you can also cancel through Settings → Apple ID → Subscriptions. You keep access until the end of the current billing period. No refunds for partial periods, but you are never locked in.

Is my solar production data secure?

Yes. All data in transit is encrypted via TLS. Production data is stored in an isolated Postgres database. OwlWatt never stores your Enphase account credentials in plaintext — OAuth tokens are encrypted at rest. We do not sell or share your data with installers, manufacturers, or third parties.

What does a production guarantee shortfall actually mean?

Most solar installer contracts include a production guarantee — a promised number of kWh per year. If your system produces less than that, the installer owes you a check or service credit. OwlWatt computes the expected production using NREL pvlib models calibrated to your panel specs, tilt, and local weather, then compares it against actual inverter data to document any shortfall in dollars.

Does OwlWatt restore purchases on iOS?

Yes. If you reinstall the app or switch iPhones, tap Restore Purchases in Settings to relink your Apple subscription. If you subscribed on the web, sign in with the same email and your access is restored automatically — no Apple transaction needed.

Connect your inverter, see your first shortfall report, and decide if OwlWatt is worth keeping. 30 days free — no credit card required.

Start free trial →