The ABYC has ratified standard E-13 covering the installation of lithium batteries on boats. E-13 replaces TE-13, a technical note that provided a preview of the direction the ABYC was headed with the standard. But, not having an approved standard for lithium battery installs presented some challenges. The main one comes from insurance companies not having an approved standard they could reference. Now that we have a standard let’s look at what it means for new installs and those who have already installed lithium batteries.