Best energy monitoring for solar homes

If you’ve installed solar panels, you already know the question that keeps you up at night: is my system performing as expected, and am I actually saving money? The answer lives in your data, not in your inverter’s glowing screen. Here’s how to build a local-first energy monitoring setup that gives you real insight without relying on cloud services that might change their terms tomorrow.

Why Local Matters for Solar Monitoring

Most inverter manufacturers provide cloud dashboards, and they’re decent for basic checking. But they tie you to their platform, often require subscriptions for historical data, and can go offline when your internet drops. If you want to track your solar production over years, correlate it with weather data, or build automations around your actual consumption, you need local access to your numbers.

Home Assistant is the obvious choice here—it pulls data from almost everything, stores it locally, and gives you dashboards that actually work. The tradeoff is you’ll spend more time configuring things upfront, but the long-term control is worth it.

Hardware Options That Actually Work

The best starting point depends on your setup. If you’re in Europe or have a smart meter with a P1 port, the homewizard-p1-meter is the simplest path. It reads your smart meter and feeds consumption and solar production data directly into Home Assistant via local API—no cloud required. I’ve used one for two years and it’s been rock solid.

For US homes without P1 ports, or for circuit-level monitoring, you need current clamps. The shelly-plus-2pm is the workhorse here. It monitors two circuits, reports power usage in real-time, and works locally without any cloud. Pair a few of these on your main panel and you can see exactly where your power goes. The downside: installation requires opening your panel and wiring the clamps correctly. If you’re not comfortable with that, hire an electrician—you’re dealing with serious voltage.

For individual devices, the eve-energy plug gives you per-device monitoring with Matter support, so it works with Home Assistant, HomeKit, and Thread. It’s more expensive than a basic smart plug, but the accuracy is better and the local HomeKit integration is genuinely useful if you’re deep in Apple’s ecosystem.

If you want something between “whole house” and “individual plug,” the frient-electricity-meter offers another P1-style option with Zigbee, giving you flexibility if you’re already running a conbee-iii or similar coordinator.

One thing to note: many “energy monitoring” smart plugs out there only report “on” or “off” with crude estimates. If you’re serious about solar, budget for hardware that actually measures wattage, not just estimates it.

Setting Up the Dashboard

Once your hardware is in place, Home Assistant’s energy dashboard handles the heavy lifting. It automatically calculates your solar offset, tracks daily/monthly consumption, and builds the charts you’d otherwise pay for.

The real value comes from adding context. Connect the home-assistant-green or home-assistant-yellow as your controller if you haven’t already—they’re built specifically for this and integrate cleanly. Add weather data via the built-in integration and you can correlate production drops with cloud cover, not just assume your panels failed.

For automations, you can trigger things when solar production exceeds consumption (run the dishwasher, charge the EV), or alert yourself when production drops unexpectedly. These are practical, not flashy—the kind of thing that actually lowers your bill.

What You’ll Actually Use

After three months of monitoring, you’ll check three things most days: today’s production, today’s consumption, and the net (what you’re pulling or pushing to the grid). The weekly and monthly trends matter for validating whether your system size was right, but daily checks take under a minute if your dashboard is clean.

One tradeoff: if your inverter doesn’t expose local data (some Solaredge and Enphase units make this surprisingly hard), you might need a Sense or Emporia monitor instead—those aren’t in the product list but work if you’re willing to use their cloud. For everything else, the Shelly + Home Assistant route is the most flexible and future-proof.

Quick Verdict

For most solar homes, start with a homewizard-p1-meter if your meter supports it, add shelly-plus-2pm for circuit-level detail, and run it all through Home Assistant. You’ll get better data than the cloud dashboards, own your history, and build automations that actually respond to your real production—not a vendor’s estimation. The upfront setup takes an afternoon; the savings and peace of mind last years.