Power, we all want it, but how do we control it?
- Ben Shepley
- Nov 8, 2023
- 4 min read
No matter where you travel offgrid these days power is a desired commodity and the influx of 12volt systems has made that commodity easy to get. It doesn't matter if you're 4WDing, boating or touring having a 12 volt system allows us lighting, cooling, communications, support and safety.
But how do you know you're getting the most out of your system? Monitor it I say.But how?
There are two types of battery monitors, shunt-based and voltage-based.
The most simple type is the voltage-based monitor and frequently comes standard on most mobile power applications. This type of monitor just measures the real-time voltage of the battery and uses it to estimate its state of charge. Shunt-based Monitors are used to monitor batteries by capacity not voltage.The shunt-type monitor is much more accurate because it measures the actual energy flowing into and out of the battery. These battery monitors require a shunt to be installed on the negative side of the battery terminal. The shunt measures the real-time voltage of your battery system as well as the current draw.
There are many voltage monitors available. Here are some examples:
Options for Shunt Monitors
The Victron Energy BMV-712 Smart Battery Monitor is a must-have for anyone who relies on batteries in their off-grid or mobile power systems. This device offers an impressive range of features that make it an essential tool for monitoring and managing your battery health and performance.
One of the standout features of the BMV-712 is its high precision in tracking the state of charge (SoC) and state of health (SoH) of your batteries. This accuracy is crucial for ensuring that you always know how much energy is left in your battery bank and when it's time for maintenance or replacement. The built-in Bluetooth connectivity allows you to easily access this information on your smartphone, providing real-time insights into your power system's performance.
The device also provides data on historical usage, which can be invaluable for optimizing your power consumption and extending the life of your batteries. The customizable alarms and relays add an extra layer of control, allowing you to program alerts for specific voltage or temperature thresholds.
Installation is straightforward, and the easy-to-read display makes it simple to check your battery status at a glance. The included shunt and wiring make it compatible with a wide range of battery systems, and it's suitable for both 12V and 24V setups.
Overall, the Victron Energy BMV-712 Smart Battery Monitor is a reliable and accurate tool for keeping your battery system in top shape. Its connectivity and customization options make it a valuable addition to any off-grid or mobile power setup, giving you peace of mind and helping you get the most out of your batteries.
The Renogy 500A Battery Monitor with Shunt is a capable battery monitoring system that competes well with the Victron Energy BMV-712 Smart Battery Monitor. Here's a comparison of the two, highlighting their respective pros and cons.
Renogy 500A Battery Monitor with Shunt:
Pros:
1. High Amperage Handling: The Renogy 500A monitor is designed for high-amperage systems, making it a suitable choice for larger battery banks and heavy-duty applications.
2. Cost-Effective: This battery monitor often comes at a more budget-friendly price point compared to the Victron Energy model, offering good value for those looking to monitor their battery system without breaking the bank.
3. Bright LCD Display: The LCD display is clear and easy to read, providing essential information about battery status, voltage, and current draw.
4. Wide Voltage Range: It can handle a broad range of battery voltages, accommodating different setups, including 12V and 24V systems.
Cons:
1. Lack of Wireless Connectivity: The Renogy model may not offer the same wireless connectivity and smartphone app integration as the Victron Energy BMV-712, which could be a drawback for users who prefer remote monitoring.
2. Slightly Less Precision: While it provides accurate battery monitoring, some users may find that it doesn't offer the same level of precision and customization as the Victron model.
Victron Energy BMV-712 Smart Battery Monitor:
Pros:
1. Precision Monitoring: The Victron BMV-712 offers highly accurate state of charge and state of health information, providing precise insights into battery performance.
2. Bluetooth Connectivity: The built-in Bluetooth connectivity allows for real-time monitoring on a smartphone or tablet, making it easy to track your battery status remotely.
3. Customisable Alerts: Users can set up customisable alarms and relays for specific voltage or temperature thresholds, enabling proactive maintenance and management.
4. Historical Usage Data: This monitor provides valuable historical data on battery usage, helping users optimise power consumption and prolong battery life.
Cons:
1. Higher Price: The Victron model tends to be more expensive than the Renogy 500A monitor, which might be a concern for budget-conscious buyers.
2. Lower Amperage Handling: While it works well for most applications, it may not be the best choice for extremely high-amperage systems.
In summary, the choice between the Renogy 500A Battery Monitor and the Victron Energy BMV-712 Smart Battery Monitor depends on your specific needs and budget. The Renogy monitor is a cost-effective solution for larger battery banks, while the Victron model offers more precision and connectivity options, making it ideal for those who prioritise remote monitoring and advanced customisation.
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