Joe, if only that were true. As designed from the factory the ESS battery must have power or your JL won't cold crank. https://www.jlwranglerforums.com/why-the-3-6l-v6-jl-jumpstarts-are-the-way-they-are/Good to know that the worthless, expensive abomination shuts itself off rather than shutting the Jeep down when it fails.
There are workarounds.
This is one of @Jebiruph's links. https://www.jlwranglerforums.com/fo...olidated-information.25377/page-3#post-654156
He'd most responsible for identifying how this worsk and how to get around this reliance on the ESS battery.