PowerMon - Bluetooth Battery Monitor / DC Power Meter with logging - thornwave

Thornwave Labs Inc.

PowerMon - Bluetooth Battery Monitor / DC Power Meter with logging

31

$119.00

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 (coming soon as a firmware / app update).

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 switc. . .
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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 (coming soon as a firmware / app update).

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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Details

• Remotely monitor two DC voltages, current, power, energy (Wh), battery charge, (Ah) and temperature

• Measure voltage up to 75V and current up to 60A using the internal current shunt

• Sense up to 160mV of voltage drop across an external current shunt, allowing up to 10,000A of current to be measured

• Monitor battery state of charge (in %) and remaining battery remaining run-time

• Logging capabilities (history) and Internet presence through integration with third party system (see below in the dedicated section)

• Control a power relay or SSR (Solid State Relay)

• Low / high voltage disconnect, over-current disconnect or disconnect based on the fuel gauge (battery state of charge)

• Battery isolator for multiple battery systems

• Remote ON/OFF switch and timer functions

• Lithium iron phosphate charge manager

• Password lock function

• Low (6mA) self power draw

• Easily configurable

• 3.0″ x 1.55″ x 0.75″ (76mm x 39mm x 19mm) including the mounting flanges

• Solidly built

• Weatherproof

User Manual

Quickstart Guide

The latest hardware revision of PowerMon and PowerMon-5S devices already does data logging. The measurement history can be accessed using the PowerMon mobile apps.

Do you need battery monitor logging and Internet access to the logged data?

RV Whisper created an integration with the Thornwave Bluetooth Battery Monitor that provides additional functionality for battery monitoring that includes:

• Logging of all battery monitor data

• Volts

• Amps

• Watts

• Amp-hours

• State-of-charge

and more

• Secure Internet access to historical battery data

• Email and text alerts based on battery monitor data

• Access to data logged by RV Whisper from other devices

To see more details about the integration and how it works, click here.

If you have not already purchased a Thornwave Battery Monitor, and you want the RV Whisper integration, it is simpler to purchase both from RV Whisper.

If you already own a Thornwave Battery Monitor, RV Whisper will still integrate with it. Contact RV Whisper to enable the integration with a Thornwave Battery Monitor you already have.

Common Applications

PowerMon FAQs

Any shunt that develops a maximum voltage drop of 80mV (if used to sense current in both directions) or 160mV (if used to sense current in one direction only) and supports the maximum current you want to measure would work.

Here is one we sell and it fits the PowerMon device like a glove:

500A/75mV/0.5%

Make sure the location services are enabled. Also make sure that the app has access to Location Services (under Application Manager you can control what services is any application allowed to use). Also, if you just upgraded to Android 8 (Oreo), restart your phone.

Android 4.4

Any relay with a coil voltage of 12V and current less than 0.5A works.

It is better to use a solid state relay (TL-SSR12100DCU) but if you insist on a mechanical one, here are some examples of automotive relays: 40A relay, 200A relay

Also, note that a relay is only required if you are planning to use the low voltage disconnect or any auto-disconnect feature or the remote ON/OFF feature. For an RV / boat installation it is recommended to use a relay. This will allow you to turn the power off entirely when in storage (to avoid parasite loads draining the battery). The low voltage disconnect will protect the battery against over-discharge which can damage it.

Yes, you can use an SSR.

One of the advantages compared to a mechanical relay is that they require a much lower current to hold in the ON state (about 20mA compared with up to 0.5A for mechanical relays). This makes a big difference in boats and RVs where power is limited. Also the contacts don’t wear out, there is no sparking and it is quiet.

The TL-SSR12100DCU SSR was built by Thornwave Labs specifically for RVs, boats and other vehicles with a 12 Volts electric system.

PowerMon allows you you 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.

We advice to install it on the positive side because this way you will not disturb the ground connection.

No. PowerMon cannot log any data, but RV Whisper created an integration with our monitor that allows you to log the battery data and access it remotely through Internet. You can find more details towards the beginning of this page, under “Logging Capabilities & Internet Presence”.

Also, stay tuned though for future products!

Customer Reviews

4.8 Based on 31 Reviews

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A

09/24/2020

Anonymous

United States

great for testing

This unit has worked great for solar input charging in our lab so far.

FH

09/17/2020

Fred H.

United States

Second unit purchase

I have one of these already on my camp trailer and have been very pleased with it so I purchased a second to monitor a 100AH LiFePO4 battery. The hardest part about the install is figuring out how to layout the install.The device itself is simple to wire in.

PK

08/31/2020

Patrick K.

United States

Best Battery Monitor

This is the second unit that I have purchased. These units are perfect for monitoring and controlling all types of battery projects. I currently use this one to control and monitor a 24V 400aH AGM battery stack in parallel with a 510aH NMC lithium stack for my inverter. I am able to monitor both the battery and the common bus using this device, and also control the charging current and discharge current using an external current shunt. Wish I had a couple more. It is great being able to poll the device and also switch it on or off over bluetooth with my phone. The range is also terrific. I can pick up the signal from my office and the equipment is located in my laundry room, quite a good distance away. This is what I was going to design myself......, saved me the trouble!! Good job Thornwave.

AB

08/24/2020

Andy B.

United States

So far so good- very impressed!

Easy to install, very good Instruction Manual, interface is simple but versatile and informative. EAGERLY awaiting data logging software AND the touch-screen panel interface! Good friend just ordered his, I may get another for battery testing.

SM

08/24/2020

Steve M.

United States

Doesn't work

I've had ZERO success with this product. The configuration diagram is unsatisfactory. Cannot get the app to recognize the monitor.

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PowerMon - Bluetooth Battery Monitor / DC Power Meter with logging

Details

Common Applications

RVs

Boats

Smart Home

Solar Energy

Automation

PowerMon FAQs

The PowerMon app

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