LiFe Po battery question

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I have a 320 amp alternator, Big 3, isolator, 200ah LiFe Po lithium battery, 3.5K DC audio amp, and 15 inch Sundown in my Tundra. Can I connect it all directly without a DC-DC charger? The DC-DC changer only charges 50 amp. I read the instructions and it says max charge is 100 amp for the battery. Please help a brotha out.

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[CarAudio.com - Hal AI Bots]

I have a 320 amp alternator, Big 3, isolator, 200ah LiFe Po lithium battery, 3.5K DC audio amp, and 15 inch Sundown in my Tundra. Can I connect it all directly without a DC-DC charger? The DC-DC changer only charges 50 amp. I read the instructions and it says max charge is 100 amp for the battery. Please help a brotha out.

With your setup, you have a robust power system that should handle your audio needs well; however, there are some important considerations when connecting your components.

1. **Connecting Directly**: You can connect the lithium battery directly to your audio system, but there are a few things to keep in mind. Since your battery is rated for a maximum charge of 100 amps, you want to ensure that your alternator and amp do not exceed that during operation.

2. **Alternator Output**: Your 320 amp alternator is capable of producing more current than your battery can handle. This means that if the alternator is charging while the audio system is drawing power, you might run into issues with overcharging the battery.

3. **Battery Management**: Lithium batteries typically come with a Battery Management System (BMS) that protects against overcharging and high discharge rates. Make sure your battery's BMS is functioning correctly and is configured to your needs.

4. **DC-DC Charger**: While you mentioned that the DC-DC charger only charges at 50 amps, its purpose is to regulate the voltage and current going to the lithium battery. If you're concerned about exceeding the charge rate, using a DC-DC charger could be beneficial even if it’s only rated for 50 amps, as it will help ensure that your battery isn’t overloaded.

5. **System Configuration**: If you choose to connect everything directly without a DC-DC charger, monitor the battery voltage closely. Ensure that it does not exceed the recommended voltage for your lithium battery (usually around 14.6 volts for charging). If you notice that the voltage is consistently high, then it’s advisable to reconsider the setup.

6. **Fusing and Circuit Protection**: Ensure that you have proper fusing in place for all connections to prevent any potential shorts or overloads.

In summary, while you can connect your system directly, doing so without proper voltage regulation could risk damaging your battery. If you can, consider using a DC-DC charger to manage the charging effectively, even if it has a lower amp rating.

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[RobGMN Premium Member]

I have a 320 amp alternator, Big 3, isolator, 200ah LiFe Po lithium battery, 3.5K DC audio amp, and 15 inch Sundown in my Tundra. Can I connect it all directly without a DC-DC charger? The DC-DC changer only charges 50 amp. I read the instructions and it says max charge is 100 amp for the battery. Please help a brotha out.

Your alternator puts out what is needed, not full amperage at all times, but it's not a bad idea to use the DC-DC since you are dealing with three different draws: system power, stock battery, LiFePo battery.
What is the resting voltage of the LiFePo?

Are you planning to use the system with the car not running, often?

 

[Popwarhomie 5,000+ posts]

I have a 320 amp alternator, Big 3, isolator, 200ah LiFe Po lithium battery, 3.5K DC audio amp, and 15 inch Sundown in my Tundra. Can I connect it all directly without a DC-DC charger? The DC-DC changer only charges 50 amp. I read the instructions and it says max charge is 100 amp for the battery. Please help a brotha out.

Do not.

That battery is not made for car audio charge/discharge rates.