The BMV-702 distinguishes itself by monitoring a second battery’s voltage, crucial for multi-battery systems, and providing extra inputs for midpoint voltage or temperature monitoring.
The BMV-702, however, is better suited for more complex setups, with its ability to monitor secondary batteries and provide additional data like midpoint voltage or temperature. This makes it invaluable for larger, multi-battery systems where detailed insights and balanced battery management are crucial.
The choice between the two depends on the complexity and scale of your energy system, with the BMV-702 offering advanced features for more comprehensive monitoring needs.
the Victron BMV-700 and BMV-702 are well-known battery monitors in the Victron Energy lineup, popular among professionals and enthusiasts in RV, marine, and off-grid solar applications. Here’s an overview of each:
Victron BMV-700
The BMV-700 is a high-precision battery monitor designed to provide critical data about your battery system.
Key Features:
- It measures battery voltage, current, power, ampere-hours consumed, and state of charge.
- The monitor can also calculate the time remaining at the current rate of discharge.
- It has a programmable visual and audible alarm system.
Display and Interface:
- The BMV-700 features an easy-to-read display that shows all the essential data.
- It includes a user-friendly interface for navigating through the data and settings.
Installation and Compatibility:
- The installation process is straightforward, typically involving the connection of the monitor to a shunt placed in the negative line of the battery.
- It’s compatible with a wide range of battery types, including lead-acid, lithium-ion, and others.
Victron BMV-702
The BMV-702 is similar to the BMV-700 but with additional features that make it more versatile.
Link to Manual and Quick installation Guide
Additional Measurement Capabilities:
- The BMV-702 can measure the voltage of a second battery, such as a starter battery, in addition to the main battery bank.
- It also has an additional input that can be programmed to measure the temperature or midpoint voltage (useful for large battery banks to ensure even charging and discharging).
Key Features:
- Like the BMV-700, it measures voltage, current, power, ampere-hours consumed, and state of charge.
- It also includes programmable alarms and displays remaining time.
Display and Interface:
- The display and user interface are similar to the BMV-700, offering clear and comprehensive data presentation.
Installation and Compatibility:
- Installation involves connecting the monitor to a shunt and potentially to a second battery or temperature sensor.
- It’s also compatible with various battery types.
Can I use the BMV-702 with one battery?
Yes, you can. Usually, two wires are going to the two positives of the battery. If you only want to use one battery, then you use one wire. You don’t have to wire the second positive wire.
Conclusion
The BMV-700 is good for a normal off grid solar system. It’s cheaper too. Don’t know if Victron is for you? Read my article about the best battery monitors.
Read more: Do you need a shunt if you have a BMS?
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