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Thornwave Labs Inc.

PowerMon - Bluetooth Battery Monitor / DC Power Meter with logging

38 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 s. . .
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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 38 Reviews
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WK
03/03/2021
Wayne K.
United States United States
I recommend this product
This thing is awesome!

I saw this referenced on a review of a competing product and thought I would give it a try. No wires to run, no holes to drill sounded pretty sweet. It was super easy to install and linked to my Android as soon as started the software. No pairing, PIN's or anything. I purchased the 500A shunt and the solid state relay too. Just installed them yesterday. Today I charged up my lithium service battery. The PowerMon let me monitor the whole process from the comfort of my living room, talk about range on the Bluetooth. I worked through all the settings this afternoon and have it tuned exactly the way I wanted. I couldn't be more pleased with everything I purchased from Thornwave.

RC
03/03/2021
Richard C.
United States United States
I recommend this product
Helpful in so many ways!

Phone support was great at helping me set up the PowerMon and understanding the problems I later found with my LiPo battery and RV charger while using the PowerMon. Super product & super support! Highly recommended!

A
02/25/2021
Anonymous
United States United States
I recommend this product
Thornwave Powermon - Bluetooth Meter

This product was exactly as advertised. The wiring and installation was a snap. The wiring diagrams were very clear and the Owners Manual along with the Quick Install Guide were extremely helpful.

KS
02/25/2021
Keith S.
United States United States
I recommend this product
PowerMon Bluetooth Battery Monitor with logging

Pros: - Data logging - Built-in temperature monitoring - Easy to use App that can display history - Appears fairly weather resistant (enough to use on top of vehicle battery without worries) - Low power (Don't need to worry too much about parasitic drain on battery) Cons: - No current way to export data logs with included App

JH
02/12/2021
Julian H.
United States United States
I recommend this product
Product Good Support Bad

Happy with the product. Would like to see a voltage bias setting since both my units are out of accuracy spec at low voltages (3.5V). Sent two emails to tech support and didn’t receive a reply to either.

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