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Thornwave Labs Inc.

PowerMon - Bluetooth LE Advanced Battery Monitor / DC Power Meter with data logging

76 reviews
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We developed the PowerMon device because we wanted an affordable, high-tech solution that you can use to monitor electrical systems. PowerMon can be used in RVs, campers, boats, solar systems, off-grid systems, or really anywhere you have a battery that you want to monitor. 

PowerMon is a Bluetooth Low Energy device that measures voltage up to 72V, and current up to 60A using an integrated shunt and temperature. It then calculates power (W), energy (Wh), charge (Ah), battery stat. . .
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We developed the PowerMon device because we wanted an affordable, high-tech solution that you can use to monitor electrical systems. PowerMon can be used in RVs, campers, boats, solar systems, off-grid systems, or really anywhere you have a battery that you want to monitor. 

PowerMon is a Bluetooth Low Energy device that measures voltage up to 72V, and current up to 60A using an integrated shunt and temperature. It then calculates power (W), energy (Wh), charge (Ah), battery state-of-charge (SOC %), and estimated time left on the battery. PowerMon keeps track of various statistics: minimum and maximum voltage, current, temperature, battery SOC, the total charged Ah, total discharged Ah, and much more. If you need to measure current higher than 60A (internal shunt rating), an external shunt can be used. 

It doesn't stop here! PowerMon can drive an external relay (or SSR - Solid State Relay). You can use PowerMon as a low voltage disconnect, high voltage disconnect, over-current disconnect, temperature controller, LiFePO4 battery charge manager, as a timer device, as a remote ON/OFF switch, or for automatic generator control. 

A very important feature of PowerMon is that it logs the data for up to 3 years in internal memory (as opposed to other similar products on the market). This means that you don't need to have a mobile device permanently connected to the battery monitor. Whenever you connect to PowerMon, the mobile app will download the data logs from the device. 

Using the PowerMon app or the newer PowerMonX app you can view the measured data in real-time, the statistics, download the log data and visualize it as a chart, configure the device or even update the firmware in the device when new versions become available. 

The small form factor and ease of installation make PowerMon ideal for quickly adding smarts to any existing electrical system. Bluetooth frees you from the need to wire your RV, camper, or boat. PowerMon offers a bonus second voltage input that you can use to monitor a starter battery or maybe the voltage coming from your solar panels. 

Remotely monitoring DC circuit parameters has never been easier!

PowerMon - User Manual

PowerMonX - App Cheat-Sheet


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PowerMon FAQs



Customer Reviews
4.7 Based on 76 Reviews
5 ★
86% 
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4 ★
7% 
5
3 ★
1% 
1
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94reviewers would recommend this product Write a Review

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Filter Reviews:
    DP
    08/15/2022
    Daniel P.
    United States
    I recommend this product

    Need to add an external shunt to make this work with the size of my battery cables.

    So far I cannot connect up to my 12 volt batteries in parallel. I am hesitating in splicing into my major battery cables to add fuses and an external shunt, not knowing if this would work. Directions and diagrams are limited.

    A
    06/21/2022
    Anonymous
    United States United States
    I recommend this product

    Slick battery monitor

    This battery monitor did the trick tracking down my battery drain issue

    AE
    06/10/2022
    Alan E.
    United States United States
    I recommend this product

    Great product, great support

    Using it on a RV battery bank. So far I've been super happy with it. Gives me everything I need and seem very accurate. Support is also great, as some shunt options were not listed in the setup and company responded by adding them in days.

    JL
    06/06/2022
    Joseph L.
    United States United States
    I recommend this product

    Works much better than expected. Well made

    Once I figured out how to use the app it isn`t too bad. I`m a little confused a bit why I ordered a new unit and was sent a very old version. Not a major deal breaker since it currently does what I want but if I was expecting to use the updated version functions... The Bluetooth works very well. I can monitor my system batteries in the shed about 40 feet from the house saving me the aggravation going back and forth to check status on the local charge monitor display in the shed

    JS
    05/23/2022
    Jimmy S.
    United States United States
    I recommend this product

    Powemon system

    I put the powermon, external shunt and relay in my 2006 fifth wheel with 2 new AGM 6 volt batteries wired in series to make 12 volts. I updated my charging system converter to a new 3 stage unit which will do AGM or lithium ion batteries. I used 2 ga wire from the converter to the battery box and 4 ga. Wire for battery connections to the relay and shunt and 16 ga wire for powermon controller. The unit works flawlessly and has a huge Bluetooth range even into my house which the trailer is parked next to. The support for these products is superb and the tech takes time to explain any questions you have. I am very happy with Thornwave. Thanks Raz for your help.

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