Expanding Your Service Offering: Home Energy Profiling with Shelly Pro 3EM
A Simple Job That Opens Bigger Conversations
Your customers trust you with their electrical installations. That trust is an asset - and with minimal additional training, you can use it to offer a service that is genuinely useful to them, billable for you, and completely independent of any PV commitment.
The Shelly Pro 3EM is a three-phase energy monitoring device installed at the main distribution board. It requires no load isolation, no additional wiring beyond CT clamp installation on the incoming phases, and typically takes under 30 minutes to commission. Once running, it delivers 1-minute resolution consumption data via the Shelly Cloud platform, giving your customer a detailed profile of their home's electricity usage over time.
Installation Overview
Hardware: Shelly Pro 3EM + three CT clamps (included), DIN rail mount, 230V supply connection
Steps:
Clip CT sensors onto L1, L2, L3 incoming conductors - no load break required
Connect neutral and 230V supply to the device terminals
Commission to customer Wi-Fi via the Shelly app (2–4 minutes)
Link to customer's Shelly Cloud account (premium subscription required for 1-minute data retention)
Standards compliance: The device does not modify the installation. CT clamps are non-invasive. No notification to the grid operator (DSO) required.
What Your Customer Gets
Feature | Detail |
|---|---|
Measurement resolution | 1 minute |
Data retention (Premium) | 12 months |
Per-phase readings | Voltage, current, active/reactive power, power factor |
Access | Web dashboard + mobile app |
Export | CSV download, REST API |
What You Can Tell Your Customer
Most homeowners thinking about solar panels are making decisions based on a monthly bill total. With two to four weeks of profiling data, they will know:
Their daily and weekly usage patterns
Their peak demand (relevant for battery sizing)
Their base load (overnight floor - minimum battery capacity to cover it)
Whether a small plug-in PV unit (balcony system) or a whole-home system better matches their actual consumption
You do not need to be a PV specialist to explain this. The Shelly dashboard is clear and the numbers speak for themselves. If your customer wants to proceed with a PV installation, they can take the data to any installer. You have given them something valuable either way.
Extending the Value
If you want to build more of this into your regular work:
Post-installation monitoring: Leave the device in place after the customer's solar system is installed. It can monitor combined consumption and generation, especially with a Shelly EM Gen4 added for PV output measurement.
Tariff optimisation: The per-phase time-stamped data is useful for customers on time-of-use tariffs who want to understand their peak vs. off-peak consumption split.
Fault baselining: Anomalous consumption events stand out clearly against an established baseline - useful for customers reporting unexplained bill increases.
Summary
The Shelly Pro 3EM profiling installation is a clean, fast, low-risk job that extends your customer relationship and gives homeowners genuine insight before they commit to a major energy investment. No PV expertise required.