It was at a cove that wasn't particularly protected. I built this battery monitor to understand the state of each of the battery since we experienced a total battery failure in one of the worst conditions: About 18 months ago, we were at anchor around Angel Island. For January, it was fantastically warm and calm, a truly great short vacation! We took the boat out to the Bay and spent the night at Paradise Cove in the northern part of the Bay around San Francisco.
MARINE BATTERY STATUS MONITOR INSTALL
You can view and capture real-time and historical data from the BMV-702 to a Windows computer with the VE.Direct to USB interface.Īll Victron products come with a 5 year worldwide warranty, supported by an international network of service points and dealers.įor more information, see the Victron BMV-700 & BMV-702 Battery Monitor Install Guide and Owner's Manual.It was a great weekend for testing high capacity marine batteries. There are also a wide variety of alarms that are user-configurable. Time-to-go: this is an estimation of how long the battery can support the present load until it needs recharging.īattery Temperature (BMV-702 or -712 only): when using the optional temperature sensor instead of the second battery voltage monitor.īattery Top Section, Bottom Section, and Mid Point Deviation (BMV-702 or -712 only): used to monitor the health of a number of batteries in series. A fully discharged battery will be indicated by a value of 0.0%. A fully charged battery will be indicated by a value of 100.0%. This readout represents the current amount of energy left in the battery. State-of-charge: this is the best way to monitor the actual state of the battery. If a current of 12A is drawn from the battery for a period of 3 hours, this readout will show –36.0 Ah. A fully charged battery sets this readout to 0.0 Ah (synchronised system). Power: power drawn from the battery in watts.Ĭonsumed Amp-Hours: this displays the cumulative Ah consumed from the battery.
If for example a DC to AC inverter draws 5A from the battery, it will be displayed as –5.0 A. A discharge current is indicated as a negative value (current flowing out of the battery). Starter battery voltage (BMV-702 only): this readout is useful to make a rough estimation of the starter battery’s state-of-charge.Ĭurrent: this represents the actual current flowing in to or out of the battery. Excessive voltage drops for a charged battery when under heavy load can also indicate that battery capacity is insufficient. A fused wire (included) connects the shunt assembly to the positive battery terminal for voltage sensing.īattery voltage: this readout is useful to make a rough estimation of the battery’s state-of-charge. The shunt attaches between the battery and the ground connections, and a provided network cable connects the two.
The battery monitor display comes with both a round and square bezel, and fits a 52 mm (2-1/16") hole. Each parameter, such as the voltage at which the battery is considered empty, can be adjusted if desired to accommodate individual battery characteristics and/or user preferences. Once the size of the battery bank is configured into the monitor, all of the other calculations, including the nominal battery voltage, are automatic.
Since there are inefficiencies in charging and discharging (Peukert's law), the BMV-702 performs sophisticated calculations to correct for these factors. The BMV-702 is identical to the BMV-700, but with the ability to monitor a second bank or accept a temperature probe.
MARINE BATTERY STATUS MONITOR SERIES
When an independent, stand-alone system is desired, the Victron BMV series is an excellent choice. Monitors pay for themselves many times over, and we can't imagine being without them on any battery-based system. The Victron BMV-702, like any good battery monitor, allows you to better maintain your batteries and track your energy usage and charging systems.
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