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Thornwave Labs Inc.

PowerMon - Bluetooth Battery Monitor / DC Power Meter with logging

14 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.

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 au. . .
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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.

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
5 Based on 14 Reviews
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Filter Reviews:
    A
    03/11/2020
    Anonymous
    United States United States
    I recommend this product
    Quality service

    My 2 year old unit failed. This company sent me a new one free of charge. Excellent service.

    DD
    02/25/2020
    Dan D.
    United States United States
    I recommend this product
    Great little unit.

    Well documented. Worked first time I fired it up. Was sold out when I wanted to reorder so buy two!

    JO
    12/09/2019
    JOHN O.
    United States United States
    I recommend this product
    Almost perfect

    I'm using the Powermon as part of a lithium battery management system in my van camper. Out of the box - coupled with the Thornwave SSR and shunt it does a good job of protecting the battery from over discharge and as a state of charge meter. While it can also trigger a relay when an over charge situation is detected it lacks a second relay port. Which means you have to purchase and install two powermon devices if you want both LVD and HVD protection. Why? because you don't want to disconnect the loads when an over charge condition is detected! Note: I purchased a second powermon and dedicated it to charge control. The charger I'm using is a Kisae DMT1250. I installed an SPST relay across the ON/OFF switch in the charger. The powermon closes the relay when the battery voltage drops to 13.31 and opens it at 13.68 - for further detail with regard to the charging regimen find the link to this article "Lithium Iron Phosphate LiFePO4 - Generic Charge Settings NEW" on this webpage: https://www.morningstarcorp.com/custom-settings/custom-settings/#battery-manufacturer-model

    RP
    11/18/2019
    Russell P.
    United States United States
    I recommend this product
    Excellent product and support

    The product is excellent and when I had questions the support was absolutely first rate.

    AH
    11/12/2019
    Anthony H.
    United States United States
    I recommend this product
    Experience had been great so

    Experience had been great so far I've set this unit up as a portable battery monitor with alligator clips that i can use with the relay control for the balancing of large lithium battery cells and monitor around the shop with my phone.

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