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Thornwave Labs Inc.

PowerMon - Bluetooth Battery Monitor / DC Power Meter with logging

56 reviews
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PowerMon is a Bluetooth hi-tech device that can be used to monitor the state of charge of any battery and power flow in any electrical system. The data logging function allows it to store measurements for up to 3 years. The storage is on board the device not in the mobile app. 

On top of the monitoring functions, PowerMon can act as a power controller, allowing for low voltage disconnect, high voltage disconnect, over-current disconnect, battery isolator, remote ON/OFF switch, timer swi. . .
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PowerMon is a Bluetooth hi-tech device that can be used to monitor the state of charge of any battery and power flow in any electrical system. The data logging function allows it to store measurements for up to 3 years. The storage is on board the device not in the mobile app. 

On top of the monitoring functions, PowerMon can act as a power controller, allowing for low voltage disconnect, high voltage disconnect, over-current disconnect, battery isolator, remote ON/OFF switch, timer switch, generator control, and solar system automation. With Bluetooth LE (Smart) connectivity there is no need for drilling and extra wiring in existing or new applications (RVs, boats, solar systems). Small form factor and ease of installation make PowerMon ideal for quickly adding smarts to any existing electrical system. Remotely monitoring DC circuit parameters has never been easier!

Voltage, current, power, energy, battery state of charge, and temperature are all measured and displayed in real-time using Thornwave Labs’ mobile application, PowerMon, which is offered for free on Google Play and Apple App Store. The device supports multiple configurations and measurement ranges that can be set up using the app, allowing it to accommodate a variety of circuits. Control of a mechanical or solid-state relay allows it to be used for low voltage disconnect, high voltage disconnect, over-current disconnect, a battery isolator for multiple battery systems, remote power control, or as timer. This wireless, multi-function tool is truly a Swiss-army knife for DC electrical systems.

The device measures two voltages up to 75V with better than 0.5% accuracy. It contains an internal shunt making it able to measure current up to 60A without using any external parts.  The current measurement can be calibrated to an accuracy better than 1%. If higher current has to be measured (as high as 10,000A), an external shunt can be added. Current shunts are readily available and can be customized for the specific current measurement range required. PowerMon supports a wide range of current shunts.


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Customer Reviews
4.8 Based on 56 Reviews
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Filter Reviews:
    TT
    10/01/2021
    Todd T.
    United States United States
    I recommend this product
    It just works!

    Like the total says, it just works. All the time, every time. I bought two of these to monitor the house battery in my Jeep that powers a Snomaster fridge/freezer. And also one in my off-road teardrop camper. I am planning on going to Lithium batteries and want to make sure I don’t under size or over size the batteries. I now know exactly how much power the fridge takes in different temperatures. Which is way off from what the manufacturer states. I have bought some other cheap battery monitors that are flaky at best. Wish I would have got this years ago, could have saved me a lot of money.

    CA
    09/10/2021
    Clayten` A.
    Canada Canada
    I recommend this product
    Powermon

    I have never owned a phone. I was born approximately 60 million years ago, I have a Luddite accent. I now have a phone a smart phone. This was very easy to set up. and install. I have installed mine in a 1958 x Greyhound bus. I can get info for the batteries 40 feet easily from the bus.

    PW
    09/06/2021
    Patrick W.
    United States United States
    I recommend this product
    Great product

    Has a lot of functionality. Great Bluetooth range 60+ feet enclosed in a metal battery box. Would like to see some timers associated to voltages or current. Example, if current >200A for 15 min., turn relay relay on or off for x time.

    A
    09/04/2021
    Anonymous
    United States United States
    I recommend this product
    Amazing Utility, Great Value

    This monitor has excellent accuracy, easy to configure control for relay, reads and controls output from over 50ft away from the device and is great for tracking charge and discharge rate for improving your use pattern in RV, vehicle, or external battery packs.

    A
    09/02/2021
    Anonymous
    Canada Canada
    I recommend this product
    Great little device

    Install and instructions were very clear. Worked with existing shunt I already had. Read the manual if you see strange values :) - fixed my issues after reading the manual LOL. Great BT signal strength to monitor from a distance. Can monitor the battery health of our camper from the drivers seat of the tow vehicle. One area I would like to see improvement on is logging. I can only seem to get logging on voltage levels. I would like to see logging on current draw as well. Highly recommend this item for your monitoring needs.

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