Kristian Ferrell
Voltage Sensitive Relay (VSR) is a system that allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously. When the voltage drops below 12.8 volts, the VSR disengages, separating the batteries. This system eliminates the possibility of draining the start battery and protects sensitive electronic equipment powered from the auxiliary battery from harmful engine start-up spikes.
| Characteristics | Values |
|---|---|
| What does it do? | Allows two batteries to be charged at the same time |
| When does it engage? | When the engine is started and the start battery reaches 13.7 volts |
| When does it disengage? | When the voltage drops below 12.8 volts |
| What does it prevent? | Draining of the start battery |
| What does it protect? | Sensitive electronic equipment powered from the auxiliary battery |
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What You'll Learn
- The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time
- When the engine is started, the start battery reaches 13.7 volts?
- The VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously
- When the voltage drops below 12.8 volts, the VSR disengages, separating the batteries?
- This system eliminates the possibility of draining the start battery
The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time
The Voltage Sensitive Relay (VSR) is a useful tool for boat owners, as it allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously. This is particularly beneficial for boats with both engine starting batteries and deep cycle house batteries, as it ensures both are fully charged.
The VSR is also designed to protect sensitive electronic equipment. When the engine is stopped and the voltage drops below 12.8 volts, the VSR disengages, separating the batteries. This prevents the start battery from being drained and protects equipment powered by the auxiliary battery from harmful engine start-up spikes.
It is important to ensure that the VSR is matched to the correct size of the battery. If the charging system is too small for the batteries, the VSR may not work properly. This can result in the system voltage dropping below 12.7 volts, causing the relay to automatically disconnect.
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When the engine is started, the start battery reaches 13.7 volts
The VSR will disengage once the residual battery voltage drops below 12.8 volts. This could be due to the engine being stopped, for example. This prevents the charging system from being too small for the batteries, which would otherwise cause the VSR to malfunction.
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The VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously
The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously. This is particularly useful for boat owners, as it means they can enjoy the benefits of fully charged engine starting batteries and deep cycle house batteries.
The VSR works by separating the batteries when the engine is not running. When the engine is started, the start battery reaches 13.7 volts and the VSR engages, connecting the two battery banks. This allows them to be charged simultaneously. When the voltage drops below 12.8 volts, the VSR disengages again, separating the batteries and preventing the start battery from being drained. This system also protects sensitive electronic equipment powered by the auxiliary battery from harmful engine start-up spikes.
The VSR is designed to work with a specific battery size. If the charging system is too small for the batteries, the VSR may not work properly. This can result in the relay automatically disconnecting when the system voltage drops below 12.7 volts. It's important to note that the way loads are run off different battery banks also depends on how a particular boat is wired.
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When the voltage drops below 12.8 volts, the VSR disengages, separating the batteries
The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously. When the voltage drops below 12.8 volts (e.g. the engine is stopped), the VSR disengages, separating the batteries. This system eliminates the possibility of draining the start battery and protects sensitive electronic equipment powered from the auxiliary battery from harmful engine start-up spikes.
The VSR will disengage once the residual battery voltage drops below 12.8 volts. This is to ensure that the correct size of battery is matched to the VSR. If the charging system is too small for the batteries, the VSR will not work properly. Once the starting battery has reached the right voltage and the house battery is connected, the system's voltage will drop below 12.7 volts and the relay will automatically disconnect.
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$143.69
This system eliminates the possibility of draining the start battery
The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously. When the voltage drops below 12.8 volts (e.g. the engine is stopped), the VSR disengages, separating the batteries. This system eliminates the possibility of draining the start battery and protects sensitive electronic equipment powered from the auxiliary battery from harmful engine start-up spikes.
The VSR is an easy-to-use module that ensures boat owners can enjoy the benefits of fully charged engine-starting batteries and deep cycle house batteries. The VSR will disengage once the residual battery voltage drops below 12.8 V DC. This is to ensure that the correct size of battery is matched to the VSR. If the charging system is too small for the batteries, the VSR will not work properly.
The VSR is designed to work with how a particular boat is wired. Which loads are run off which banks is determined by how the boat is wired.
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Frequently asked questions
VSR stands for Voltage Sensitive Relay.
The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously.
When the voltage drops below 12.8 volts (e.g. the engine is stopped), the VSR disengages, separating the batteries.
This system eliminates the possibility of draining the start battery and protects sensitive electronic equipment powered from the auxiliary battery from harmful engine start-up spikes.
You can ensure that the correct size of battery is matched to your VSR by referring to the battery sizing chart.
