Complete Solar Energy Production Monitoring

Q: Which solar inverters can PRTG monitor?

Anything that speaks an open protocol: Modbus TCP/RTU, SNMP, REST APIs, MQTT, OPC UA. In practice that means most commercial and industrial inverters from SMA, SolarEdge, Fronius, Huawei, Sungrow. SunSpec-compliant devices are the easiest starting point. Where it gets complicated is consumer-grade or cloud-only hardware that doesn't expose a local interface at all. Those need either a gateway or manufacturer API access, and that adds a dependency you want to know about before you start, not halfway through setup.

Q: Can PRTG predict inverter failures or do predictive maintenance?

No. Threshold alerts, historical trends, telemetry storage — that's what PRTG does. If a value goes outside the range you defined, you get notified. It won't tell you a failure is coming before the numbers move. For actual predictive maintenance you'd need to push PRTG's data into an external analytics platform that does forecasting.

Q: What about PRTG subscriptions and sensor limits?

PRTG offers sensor-based subscription tiers: 500, 1000, 2500, 5000, unlimited. Each device or endpoint you monitor counts as one or more sensors depending on how many metrics you pull from it. Script v2 and multi-channel REST sensors are heavier on probe resources than basic SNMP. On larger deployments spread the load across remote probes.

Real-time dashboards, threshold alerts, and historical reports for inverters and PV systems. Vendor-agnostic and protocol-based.

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PRODUCT OVERVIEW

How do you monitor solar energy production without adding a dedicated solar monitoring software to your stack?

PRTG collects solar energy system telemetry using industry-standard protocols: Modbus TCP/RTU, HTTP Push/REST APIs, SNMP, MQTT, and OPC UA. It stores historical data, fires threshold-based alerts when system performance degrades and publishes dashboards and automated reports. Worth noting: PRTG is vendor-agnostic, but your inverters need to support open protocols for solar panel monitoring to work. There's also setup work involved. Register mapping for Modbus is the most hands-on part. REST templates for cloud APIs or custom scripts for proprietary formats add complexity depending on what you're working with. PRTG handles energy monitoring across protocols, not through vendor-specific integrations.

Supported technologies: Modbus TCP/RTU (SunSpec where available) · HTTP Push / HTTP IoT Push Data Advanced · REST Custom / REST v2 · SNMP · MQTT · OPC UA · Script v2 / EXE Advanced · PRTG Data Hub for log forwarding

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PRTG is compatible with all major vendors, products, and systems

What PRTG Brings to Solar Operations

Unified Monitoring Across Solar and IT Infrastructure

Solar monitoring systems are fragmented by design. Your inverter manufacturer gives you a cloud portal showing DC input, AC output, and daily energy totals. Your network team monitor switches, routers, and WAN links all with entirely separate tools. Nobody designed this situation intentionally. It's just how things ended up.

PRTG consolidates solar production data with your existing IT infrastructure monitoring. Using Modbus TCP/RTU sensors for inverter telemetry, SNMP for networked power meters, and remote probes for multi-site connectivity, PRTG brings solar array health and IT infrastructure status into one place. The map view alone tends to be what facilities managers notice first: all arrays geographically, drill into any site from there.

What this gives you:

Single dashboard combining energy output, inverter health, environmental sensors, and network status
Faster root-cause analysis: correlate network outages with inverter alarms instead of switching between tools to figure out which problem caused the other
Unified alerting so the same notification rules that page your on-call team for a router failure also cover inverter underperformance. One rule set. One team.
Complete operational visibility for facilities managers and IT teams working from the same data, which matters more than it sounds when both groups are used to working in isolation

Custom Alerts for Every Inverter Metric That Matters

Manufacturer portals cover fault codes and hard failures well. What PRTG adds is granular per-channel alerting for everything your inverter exposes: DC input voltage and current, AC output power and frequency, inverter temperature, daily energy counters, and operating status codes. You define upper and lower limits per channel. Multi-channel triggers let you combine conditions, e.g. energy output below threshold and inverter temp above normal, so alerts only fire when the combination actually means something. Tracking energy patterns over time also helps you establish seasonal baselines before locking in thresholds. Notifications scale with severity: warnings go to your monitoring app or email while critical alerts trigger SMS, webhooks to your ITSM system, or syslog forwarding to your SIEM.

Where this pays off:

Configurable channel limits per inverter or per array, with separate thresholds for different equipment or seasonal baselines
Multi-channel logic to cut false positives. Alert only when it actually means something.
Notification delivery across the full chain: email, SMS, push, webhooks, SNMP traps, syslog
Context-rich alerts with current values, graphs, and device status so your team can assess severity
Downtime reduced by routing the alert to the right team with enough context to act on it immediately

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PRODUCT OVERVIEW

Full Visibility Across Every Brand and Protocol

Managing solar installations across multiple sites or mixed equipment brands typically means working with several manufacturer portals in parallel. SolarEdge, SMA, Fronius, Huawei: each exposes solid data about its own devices. PRTG gives you one place where all of it comes together, using protocol-based monitoring instead of vendor-specific integrations. If the inverter speaks Modbus TCP/RTU, SNMP, HTTP REST APIs, MQTT, or OPC UA, PRTG monitors it. SunSpec-compliant registers included. Raw data is stored locally, exportable as CSV, XML, or JSON for analytics tools, business intelligence platforms, or net metering reconciliation.

What you're not buying into:

No vendor cloud dependency. PRTG runs on your infrastructure, on-premises or hosted
Brand-agnostic visibility across SMA, SolarEdge, Fronius, Huawei, Sungrow, and anything else that speaks an open protocol
Data ownership with export via API or scheduled reports for return on investment analysis, energy bill verification, or compliance
Mix and match inverter types, power meters, environmental sensors, and networked equipment in one platform

Important note: Consumer-grade or cloud-only inverters that don't expose open interfaces require gateways, manufacturer API access, or firmware supporting local telemetry.

Historical Data, Reporting, and Long-Term Trend Analysis

Protecting a solar investment over a 10 to 20 year lifespan requires more than alerts. Verifying a return on investment, reconciling net metering credits, demonstrating compliance for renewable energy credits, catching gradual efficiency losses in solar panels that never triggered an alarm: none of that is possible without years of stored telemetry.

PRTG stores time-series data for every monitored channel: DC input, AC output, inverter temperature, energy consumption counters, and more. Retention is configurable based on available disk space and storage plan. You're not locked into a vendor-defined window. Scheduled PDF, HTML, or CSV reports cover daily, monthly, or annual solar production for whoever needs the numbers. Historic graphs let you compare output periods, spot seasonal patterns and identify slow degradation over time to make informed decisions about maintenance and where to focus cost saving efforts.

Long-term visibility includes:

Monthly production reports in PDF or HTML for stakeholders, investors, or utility net-metering reconciliation
Trend graphs over months or years to catch gradual panel degradation or soiling losses. Requires manual analysis on your end. PRTG gives you the data, not the interpretation
Exportable datasets for ROI verification, energy bill cross-checks, or financial reporting integration
Configurable retention based on your compliance requirements and available storage. No fixed expiry.

Important note: PRTG provides historical data storage, trend visualization, and reporting. No native predictive analytics, automatic forecasting, or AI-driven anomaly detection. Those capabilities require external analytics platforms consuming PRTG's exported data.

How PRTG Monitors Solar Energy Production

Your inverters already speak the protocols. Most commercial and industrial PV system equipment exposes telemetry via Modbus, SNMP, HTTP REST APIs, MQTT, or OPC UA: standard protocols used across IT and industrial automation. PRTG uses the same sensors you'd use to monitor network switches, servers, or industrial controllers, configured to read the specific registers, OIDs, or API endpoints your solar installation provides.

Modbus Sensor Setup

Modbus is the most widely supported protocol for solar inverters and power meters. DC input voltage, DC current, DC power, AC output power and frequency, inverter temperature, status codes, cumulative energy usage counters: it's all there if your device exposes it. SunSpec-compliant inverters standardize the register blocks, which speeds up initial setup considerably.

PRTG's Modbus TCP Custom sensor handles networked inverters; Modbus RTU Custom covers RS485 serial devices via gateways. Each sensor supports up to 10 numeric channels, configured per register address, data type, scaling factor, and units. That includes cumulative energy usage counters if your device exposes them. Worth noting: PRTG does not auto-discover register addresses. You need the map from your inverter manufacturer before you start.

REST and Push

Modern inverters, solar gateways, and cloud-connected data loggers either push telemetry as JSON or XML over HTTP, or expose cloud REST APIs for polling. SolarEdge and Enphase both fall into this category.

HTTP IoT Push Data Advanced sensors parse incoming JSON or XML and extract values into channels using JSONPath or XPath. REST Custom v2 sensors poll APIs on a schedule and map responses to channels via template files or inline JSONPath. Two things to sort out before you start: REST sensors need authentication configured for vendor APIs, and HTTP Push sensors require your gateway to reach the PRTG server, so check firewall rules early.

SNMP, MQTT, OPC UA

Three protocols, three different use cases, and they don't overlap much in practice.

SNMP Custom Advanced sensors work for inverters, networked UPS units, or power meters that expose SNMP OIDs. If your manufacturer provides a MIB file, the SNMP Library sensor can auto-create sensors from it. For solar gateways or IoT-enabled inverters publishing telemetry to MQTT topics via a broker (Mosquitto, AWS IoT Core, Azure IoT Hub), use MQTT Subscribe or MQTT Statistics sensors. PRTG subscribes to the topics and extracts JSON payloads using JSONPath. OPC UA Custom sensors cover industrial solar plants, SCADA systems, or data aggregators exposing NodeIDs via OPC UA servers. Realistically, you'll only see that in large-scale commercial or utility installations where PLCs manage the inverter arrays.

Each protocol requires device support and proper credentials. SNMP v3 encryption adds CPU overhead, worth knowing before rolling it out at scale. MQTT needs broker and topic planning done upfront. OPC UA is the most complex of the three.

Custom Script Sensors

When your inverter or solar gateway uses a proprietary protocol or API format that PRTG's built-in sensors can't handle, you write a custom script. Python, PowerShell, Bash, or a compiled executable: the script fetches telemetry, parses it and returns JSON in PRTG's expected schema. The Script v2 sensor executes the script on the probe and maps the response into channels. EXE/Script Advanced does the same for scripts or binaries that return output to stdout.

Store the script on the PRTG probe, or on the remote probe for distributed sites. The script authenticates to the device or API, retrieves data, transforms it into JSON with channel definitions, and hands it back to PRTG. Requires scripting knowledge and the correct runtime installed on the probe. For distributed solar sites each remote probe needs its own copy of the script, so factor that into your deployment planning.

Dashboards and Reports

PRTG covers most of what solar operations teams actually need on the visualization side: custom geographic or logical maps for multi-site arrays, live dashboards with sensor graphs and status widgets, scheduled PDF/HTML/CSV reports, and raw data export via API for energy management systems or external analytics platforms.

Build dashboards by dragging sensors, graphs, tables, and gauges onto a canvas. The interface is user-friendly enough that facility managers typically handle their own dashboard setup without IT involvement. The map designer lets you place solar sites on geographic maps and link them to device groups. For reporting, use PRTG's built-in engine or pull raw channel data via the HTTP API into Tableau, Power BI, Grafana, or a custom platform.

Also worth noting: dashboard and map setup takes time. No one-click solar template. Forecasting, predictive maintenance, and anomaly detection are not part of what PRTG does. PRTG gives you the data foundation. The analytics layer is external.

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PRTG vs. Manufacturer Portals: What’s the Difference?

Feature	Manufacturer Portals Manufacturer Portals	PRTG PRTG
Cross-vendor visibility	Manufacturer Portals Siloed per manufacturer	PRTG Protocol-based. Monitor any brand in one platform.
Alerting flexibility	Manufacturer Portals Limited, basic fault notifications	PRTG Fully customizable per-channel thresholds with escalation routing
IT infrastructure integration	Manufacturer Portals Solar-only, separate from IT monitoring	PRTG Consolidates solar, network, servers, and facilities in one place
Data retention	Manufacturer Portals Vendor-controlled, often 1 to 3 years	PRTG Configurable. Limited by your storage plan, not a vendor decision.
Data export	Manufacturer Portals Limited or manual	PRTG API-driven raw data export in CSV, JSON, or XML
Monitoring capabilities	Manufacturer Portals Device-specific only	PRTG Cross-vendor, cross-protocol, cross-infrastructure
Inverter firmware/settings	Manufacturer Portals Full access to device-specific controls	PRTG Monitoring and alerting only. No firmware management.

Bottom line: Manufacturer portals provide deep inverter-specific features (firmware updates, configuration changes). PRTG focuses on cross-device visibility, flexible alerting, and long-term data retention for operations and IT teams. Many users keep both: vendor portals for inverter configuration, PRTG for operational monitoring and cross-system troubleshooting.

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“In all our tests, PRTG was significantly more reliable and, above all, faster than classic DCIM solutions. We need a solution that gives us a real-time overview of the status of all the data centers we monitor and does not make us wait for what feels like minutes with every click. With PRTG, we have found that solution.”

Ronald Kok, CEO

All IT Rooms

“PRTG is an easy-to-use and comprehensive solution to monitor our Industrial Automation DataCenter (IADC)”

Benjamin Lauterlein, Product Manager

Siemens AG

“We went to the market and looked for a tool that was cost effective, but more importantly, could monitor most or all the items in the data center. PRTG was this tool.”

Lydia Muzar

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License Name	Price	License Details	Get started	Pricing Details
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Solar Energy Production Monitoring: Frequently Asked Questions

Which solar inverters can PRTG monitor?

Anything that speaks an open protocol. Modbus TCP/RTU, SNMP, REST APIs, MQTT, OPC UA. In practice that means most commercial and industrial inverters from SMA, SolarEdge, Fronius, Huawei, Sungrow. SunSpec-compliant devices are the easiest starting point. Where it gets complicated is consumer-grade or cloud-only hardware that doesn't expose a local interface at all. Those need either a gateway or manufacturer API access, and that adds a dependency you want to know about before you start, not halfway through setup.

Is the setup plug-and-play?

No, not really. SunSpec Modbus is the closest you'll get to straightforward, but you're still going to spend time on register mapping or REST templates depending on what your inverter exposes. Budget an afternoon minimum, more if the manufacturer documentation is bad. Which it sometimes is.

Can PRTG predict inverter failures or do predictive maintenance?

No. Threshold alerts, historical trends, telemetry storage. That's what PRTG does. If a value goes outside the range you defined, you get notified. It won't tell you a failure is coming before the numbers move. For actual predictive maintenance you'd need to push PRTG's data into an external analytics platform that does forecasting.

How long is data stored, and can I generate reports?

As long as your disk holds out. Retention isn't set by a vendor policy, it's just storage. PDF, HTML, CSV reports on whatever time range you need, scheduled or on demand. If you're planning multi-year retention for ROI tracking or compliance, size your storage accordingly upfront. It's one of those things that's annoying to fix retroactively.

Do I need remote probes for multi-site solar installations?

Depends on your network topology. Separate networks, NAT, geographically distributed sites: yes, a remote probe at each location makes sense. If you've got a gateway on-site that can push telemetry via HTTP or MQTT to a central PRTG instance that works too, and sometimes it's the simpler option.

What about PRTG subscriptions and sensor limits?

PRTG offers sensor-based subscriptiontiers: 500, 1000, 2500, 5000, unlimited. Each device or endpoint you monitor counts as one or more sensors depending on how many metrics you pull from it. Script v2 and multi-channel REST sensors are heavier on probe resources than basic SNMP. On larger deployments spread the load across remote probes.

Can PRTG integrate alerts with my ITSM or SIEM platform?

Yes. Webhooks for ServiceNow, Jira, Zendesk. Syslog for Splunk, QRadar, ArcSight. SNMP traps, email, SMS. The API covers anything else.

Can PRTG replace manufacturer dashboards entirely?

For monitoring and alerting, mostly yes. For actually managing devices, no. Firmware updates, configuration changes, inverter-specific diagnostics: that still lives in the manufacturer portal. Most teams keep both running and use PRTG for the operational picture and cross-system correlation, vendor portals when they need to touch the device itself.