IotaWatt / CircuitIQ
IotaWatt Open WiFi Energy Monitor
$389
Best Home Energy Monitors · head-to-head
IotaWatt Open WiFi Energy Monitor vs Generac PWRview Home Energy Monitor W2HEM
A sourced, side-by-side comparison. Generac PWRview Home Energy Monitor W2HEM is cheaper at $219.99. Every spec and price links to its source.
Generac
Generac PWRview Home Energy Monitor W2HEM
$219.99Cheaper
Which is better: the IotaWatt Open WiFi Energy Monitor or Generac PWRview Home Energy Monitor W2HEM?
On the specs we track, they're closely matched. The Generac PWRview Home Energy Monitor W2HEM is the cheaper at $219.99.
See IotaWatt Open WiFi Energy Monitor on Amazon See Generac PWRview Home Energy Monitor W2HEM on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | IotaWatt Open WiFi Energy Monitor | Generac PWRview Home Energy Monitor W2HEM |
|---|---|---|
| US price | $389 | $219.99 |
| Brand | IotaWatt / CircuitIQ | Generac |
| Released | — | — |
| Monitoring type | ct-clamp | ct-clamp |
| Main circuit amps | — | 264 |
| Branch circuit count | 14 | 0 |
| Connectivity protocol | Wi-Fi | Wi-Fi 802.11 b/g/n |
| Solar net metering | Yes | Yes |
| Local api support | Yes | — |
| Subscription required | No | — |
| App platforms | web (local) | iOS, Android |
| Accuracy percent | — | 1 |
| Installation type | panel-mount | panel-mount |
| Smart home integrations | Home Assistant, Emoncms, PVOutput, InfluxDB | — |
| Etl ul certified | ETL (UL + CSA) | UL/CSA 61010-1 |
Sources — IotaWatt Open WiFi Energy Monitor: stuff.iotawatt.com (verified 2026-06-27). Generac PWRview Home Energy Monitor W2HEM: norwall.com (verified 2026-06-27).
What's the difference between the IotaWatt Open WiFi Energy Monitor and Generac PWRview Home Energy Monitor W2HEM?
Where the two actually differ on the specs we track (4 of 12). Matching specs are omitted.
- Branch circuit count: IotaWatt Open WiFi Energy Monitor 14 vs Generac PWRview Home Energy Monitor W2HEM 0
- Connectivity protocol: IotaWatt Open WiFi Energy Monitor Wi-Fi vs Generac PWRview Home Energy Monitor W2HEM Wi-Fi 802.11 b/g/n
- App platforms: IotaWatt Open WiFi Energy Monitor web (local) vs Generac PWRview Home Energy Monitor W2HEM iOS, Android
- Etl ul certified: IotaWatt Open WiFi Energy Monitor ETL (UL + CSA) vs Generac PWRview Home Energy Monitor W2HEM UL/CSA 61010-1
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
IotaWatt Open WiFi Energy Monitor
No sourced tester review yet.
Generac PWRview Home Energy Monitor W2HEM
Only one whitelisted tester, NYT Wirecutter, covers the Generac PWRview W2 (W2HEM), and only qualitatively: it was a former pick now dropped for poor availability and never lab-measured. Wirecutter says it uses machine learning like Sense and suits homes already in Generac's solar and battery ecosystem. No hands-on measurements exist. (1 sourced review.)
Praised: Uses machine learning to identify where the home draws power, similar to Sense; Optimized to integrate with Generac solar panels and storage batteries; worth considering for existing Generac-ecosystem owners.
Flagged: Hard to find / limited availability; removed from Wirecutter's picks and no longer listed on Generac's site.