18S->12S Conversion Kit

The 18S->12S Conversion Kit is required for LiBCM conversions that do not use a 'real' 12S module. This kit provides the parts required to mechanically convert an 18S module to a "Pseudo-12S" module.

If required, the 18S->12S Conversion Kit is automatically added to your order during the order process.

The following video shows the 18S to "Pseudo-12S" conversion process:

As noted in the above video, a "Pseudo-12S" module is functionally identically to a real 12S module, except for the following:

1: The BMS cable wire harness does not have an intermediate BMS adapter, but instead plugs directly into the LiBCM PCB. Therefore, DIY LiBCM Kits purchased with an 18S->12S Conversion Kit will not include the 12S intermediate BMS adapter (because it's not required). In step 12, you won't plug the 12S BMS adapter in.

2: The aluminum end plate is attached to a Pseudo-12S+ module without standoffs (see video).

3: You MUST remove the OEM rubber gasket that secures the OEM NiMH cells in place. This gasket is electrically conductive and will short out the (exposed) battery terminals if left in place.

Q: Can I make a 12S+ module from either an 18S+ or an 18S-?

A: Yes. The process is the same for either starting module.


Q: Is a "Pseudo-12S" module any less safe to use than a real 12S module?

A: From a safety standpoint, there is no difference between a 'real' 12S module and a converted one.


Q: What do I do with the leftover QTY6 EHW5 cells?

A: Keep them in case you need to replace other cells down the road. They don't need to remain compressed as long as you don't charge/discharge them.


Q: What combination of 18 modules do I need:

A: The only combination that won't work is 18S+/18S+/18S+. You must have at least QTY1 18S- module.

A: The following combinations will work:

-18S-/18S-/18S- (you'll convert an 18S- module)

-18S+/18S-/18S- (you'll convert an 18S- module)

-18S+/18S+/18S- (you'll convert an 18S+ module)