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The Victron Energy SolarSense 750 is a standalone, wireless PV installation monitor built to help you make better use of your solar energy and keep an eye on the health of your photovoltaic system. It is self-powered, it needs no wiring, and it reports irradiance, estimated solar power, daily yield, and panel cell temperature straight to your phone or GX device. If you run an off-grid or grid-limited system and want to know what your panels could be producing, not just what your batteries happen to be accepting, this compact sensor is a smart addition to your setup.
The SolarSense 750 has an integrated solar panel that powers the unit, with a rechargeable internal battery (40 mAh, 3.6 V). There are no power or data cables to route, which makes it a practical choice for remote or hard-to-reach panel locations.
The sensor communicates wirelessly using Victron's Instant Readout (BLE advertisements). Open VictronConnect and you can view:
Bluetooth range depends on your installation conditions. Metal structures such as panel frames or roofs can significantly reduce range, even when only thin metal is present, so plan your placement with that in mind.
In off-grid or grid-limited systems, excess PV energy can go unused once the batteries are full. The SolarSense 750 provides real-time data on available solar power, so you or an automation system can redirect that surplus to extra loads such as a water heater or household appliances, which may reduce how much you draw from your batteries later.
The sensor keeps a record so you can look back, not just at the present moment.
Victron notes that the SolarSense 750 can act as a pilot device, helping you measure solar yield and available power in different locations, at different panel orientations, and across changing seasons. That information can be valuable when you are designing a future PV system.
The sensor measures 110 x 78 x 32 mm (about 5.91 x 3.35 x 1.57 in), carries an IP65 protection rating, and has an operating temperature range of -40 to +85 °C. It slides into a bracket that mounts against the side of your solar panel frame, with an alignment ledge to help you position it correctly.
You can enable the SolarSense 750 under Settings, Integrations, Bluetooth Sensors on a GX device. From there it appears in the Devices menu, where you can read irradiance, cell temperature, installation power, today's yield, and the sensor's battery voltage.
Off-grid homes and cabins: Watch how much solar power is actually available, and decide when surplus energy is worth sending to a water heater or other additional load instead of letting it go to waste.
Homeowners with grid-limited systems: Use the history and trend data to understand how your array performs through the seasons.
RV and mobile setups: If your panels are mounted on a frame, the sensor can sit on that frame and report in without adding more wiring. Keep in mind that a metal roof or frame between the sensor and your phone can shorten Bluetooth range.
Mobile businesses and remote sites: Keep tabs on panel temperature and available solar power at a glance, which helps when your equipment is spread out or hard to reach.
System designers and DIYers: Place it in different spots or orientations to gather real-world data before you commit to a permanent layout.
Solar monitoring usually starts with whatever data your charge controller shows. That is useful, but it generally reflects what the system is harvesting at that moment. The SolarSense 750 is built to report available solar power, irradiance, and temperature at the panel itself, which adds a different layer of insight.
Wired sensors can be a good fit for permanent installations, but they require cable runs. The SolarSense 750 takes a cable-free approach with its integrated solar panel and wireless communication. The tradeoff is that Bluetooth range depends on your installation conditions, so it is best suited to setups where you can monitor from within range or through a GX device.
This sensor makes sense if you want better visibility into your solar array without adding wiring. It works with the VictronConnect app, and it can also be read out on a GX device.
A few things to know before you buy:
This May Be A Good Fit If
Does the SolarSense 750 need wiring or a separate power source?
No. It is self-powered by an integrated solar panel and communicates wirelessly via Instant Readout (BLE advertisements).
How do I view the data?
Use the VictronConnect app, which offers Status, History, and Trends pages. You can also enable it on a GX device through the Bluetooth Sensors setting.
How long does it store data?
It stores 31 days of trend data and 730 days of daily history.
Can metal panel frames affect the connection?
Yes. Metal structures such as panel frames or roofs can significantly reduce Bluetooth range, even when only thin metal is present.
How is it mounted?
The bracket mounts against the side of the solar panel frame. The sensor slides into the bracket and is secured with a locking screw on top.
Good power planning starts with good information. The Victron Energy SolarSense 750 gives you a clear, wireless look at your panel's available solar power, irradiance, and temperature, along with a long history to learn from. At Outbound Power, we help customers build backup, RV, and off-grid power systems that make sense for how they live and work, and we are happy to be your knowledgeable partner as you choose the right pieces for yours.
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