4s 300a Lithium Ion / Lifepo4 BMS with Balance

These BMS units are perfect for 4s Lithium Ion or Lifepo4 applications that require a lot of amps like RV and car audio. These BMS units can handle 300 amps continuous discharge and 200 amps continuous charge. The brand is Xiaoxiang which is a trusted BMS manufacturer in the medical industry. You can also discharge up to 900 amps for up to 5 seconds.

They have a balance function as well so these will top balance when near full charge.

Lithium Ion version full charge 16.8v (4.2v per cell) / full discharge 11.2v (2.8v per cell)
Lifepo4 version full charge 14.6v (3.65v per cell) / full discharge 10v (2.5v per cell)

If you are building a car audio 4s lithium ion or lifepo4 battery this is a great option for you to add some protection. One of these BMS units for every 3000 watts of power. Great for all other applications as well like solar storage.

The B- and C- main connector has an M8 threaded post so you can make your connection with ring terminals and M8 bolts. We include the 2 bolts for you.

This is a common port BMS which means you can charge and discharge through the same connections. Common port BMS is the most popular and widely used BMS type. Separate port BMS units are usually for Ebikes and lower amp packs.