PowerMon-W - WiFi / IoT Advanced Battery Monitor / DC Power Meter with data logging
Designed and assembled in USA.
This product requires an additional shunt. Add one for 40% off.
Here it is, the new PowerMon-W! Everything you knew from the Bluetooth PowerMon but now with WiFi. Monitor the batteries in your RV, camper, boat, or solar system remotely from anywhere in the world. All you need is a connection to the Internet.
PowerMon-W is an affordable, high-tech solution for monitoring electrical systems. Whether you're in an RV, camper, or boat, utilizing solar systems, or managing off-grid setups, PowerMon is designed to meet your battery monitoring needs. Remotely monitoring DC circuit parameters has never been easier!
We also have PC software and a library for accessing the PowerMon devices so you can write your own custom software. Check out the PowerMon Software.
Go ahead and test before you buy. Install the PowerMonX app from the Apple / Google app stores. Using your mobile device, tap on the link below. It should open with the PowerMonX app. This is a demo device. It accepts only 16 simultaneous connections so please don't leave your phone connected to it. Other people want to test it too.
Please read the Product Use Disclaimer & Warranty Policy at the bottom of this page before ordering.
Add an additional shunt for 40% off!
Use PowerMon In
It can measure two voltages up to 72V and current over 1000A using any external shunt. It then calculates power (W), energy (Wh), charge (Ah), battery state-of-charge (SOC %), and estimated time left until the battery is fully discharged.
PowerMon-W is equipped with WiFi and can be accessed remotely, over the Internet. You can use your cellphone or tablet to connect to it and check what your battery is doing from anywhere in the world. If you don't have Internet at the location where PowerMon-W is installed, no problem! You can also connect directly to it.
PowerMon-W is configurable so you can wire it to any external shunt. Also, it's important to note that you can place it on either the positive or negative side of the battery.
The capability of driving a relay opens up a lot of possibilities. You can use either a mechanical relay or a solid-state relay for various applications, such as remote ON/OFF switch, battery protection, or even starting a generator.
Don't leave your expensive batteries unprotected!
Paired with a relay, PowerMon-W can serve various functions, including acting as a low-voltage disconnect, high-voltage disconnect, over-current disconnect, low-temperature disconnect, high-temperature disconnect, or generator controller. And by the way, we also offer timer functionality.
Record what your battery is doing! PowerMon-W can log data for up to 3 years inside an internal memory, unlike other similar products on the market that store it inside the mobile app. This means you don't need to have a mobile device permanently connected to the battery monitor. Whenever you connect to PowerMon-W, the mobile app will download the data logs from the device. PowerMon-W records voltage, current, power, temperature, and state-of-charge, and you can adjust the recording frequency from once a second to once a minute.
Enable the generator control feature, and PowerMon-W can start your generator when the voltage or state-of-charge drops below a specified threshold.
Yes, we've done this too! PowerMon-W stays connected to the Internet and does it all while sipping on only 4mA. The battery self discharge is higher than what PowerMon-W needs to function.
It can measure two voltages up to 72V and current over 1000A using any external shunt. It then calculates power (W), energy (Wh), charge (Ah), battery state-of-charge (SOC %), and estimated time left until the battery is fully discharged.
PowerMon-W is equipped with WiFi and can be accessed remotely, over the Internet. You can use your cellphone or tablet to connect to it and check what your battery is doing from anywhere in the world. If you don't have Internet at the location where PowerMon-W is installed, no problem! You can also connect directly to it.
PowerMon-W is configurable so you can wire it to any external shunt. Also, it's important to note that you can place it on either the positive or negative side of the battery.
The capability of driving a relay opens up a lot of possibilities. You can use either a mechanical relay or a solid-state relay for various applications, such as remote ON/OFF switch, battery protection, or even starting a generator.
Don't leave your expensive batteries unprotected!
Paired with a relay, PowerMon-W can serve various functions, including acting as a low-voltage disconnect, high-voltage disconnect, over-current disconnect, low-temperature disconnect, high-temperature disconnect, or generator controller. And by the way, we also offer timer functionality.
Record what your battery is doing! PowerMon-W can log data for up to 3 years inside an internal memory, unlike other similar products on the market that store it inside the mobile app. This means you don't need to have a mobile device permanently connected to the battery monitor. Whenever you connect to PowerMon-W, the mobile app will download the data logs from the device. PowerMon-W records voltage, current, power, temperature, and state-of-charge, and you can adjust the recording frequency from once a second to once a minute.
Enable the generator control feature, and PowerMon-W can start your generator when the voltage or state-of-charge drops below a specified threshold.
Yes, we've done this too! PowerMon-W stays connected to the Internet and does it all while sipping on only 4mA. The battery self discharge is higher than what PowerMon-W needs to function.
Why You Need a PowerMon
PowerMon comparison
In case you were wondering.
Bluetooth LE
Bluetooth LE
WiFi
Two
One
Two
65V
32V
72V
Max. 60A
Max. 500A
No
Any (optional)
No
Any
Either positive or negative side
Positive side only
Either positive or negative side
Involved (more wiring needed)
Easy (minimal wiring required)
Involved (more wiring needed)
High (device is enclosed in epoxy)
Low (install inside protection box)
High (device is enclosed in epoxy)
Frequently Asked Questions
Here are some questions our customers ask us the most.
I see two apps: PowerMon and PowerMonX. Which should I use?
PowerMonX is our latest app, offering enhanced features compared to the older PowerMon app. All new devices now come equipped with PowerMonX. If you own an older device, you can update to PowerMonX, but please note that it requires a device with a hardware revision of at least 2.3 (2.30). All devices sold after mid-2019 are compatible with PowerMonX.
How can I find the hardware revision of my device?
Connect to your device.
For the older PowerMon app go to the About page.
For the newer PowerMonX app go to the Device Information page.
What kind of relay can I use?
Any relay that matches the voltage of your system and a coil current rating of less than 1A can be used.
It's highly recommended to use a solid-state relay like the TL-SSR12100DCU. However, if you prefer a mechanical relay, it will work.
What about SSRs (Solid State Relays)?
Yes, you can use an SSR. One of its advantages, when compared to a mechanical relay, is that it requires much lower current to hold in the ON state, typically around 20mA, whereas mechanical relays may require up to 1A or higher. This lower current requirement is especially beneficial in boats and RVs where power resources are limited. Additionally, SSRs have the advantage of not wearing out their contacts, producing no sparking, and operating quietly.
The TL-SSR12100DCU SSR was specifically designed by Thornwave Labs for use in RVs, boats, and other vehicles equipped with a 12V electrical system. We also have SSRs for higher voltages.
Should I install the shunt on the positive or negative side of the battery?
PowerMon allows you to install the shunt on either side, or even in between batteries that are connected in series. It doesn't matter as long as the maximum voltage on the shunt is kept within -4V to +65V relative to the battery negative.
We advise installing it on the positive side because this way you will not disturb the ground connection.
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