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12v battery Public service announcement

3/15/2020

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Public Service Announcement for EV Owners - Don't forget about the standard 12V automotive battery!

When we think of our EV's power source, we're generally thinking about that large lithium ion battery pack that provides the energy for propelling the vehicle. We're generally not thinking about the standard, secondary 12V battery (typically lead acid) like every other car uses.

However, that 12V battery is vitally important! It provides power to many accessories in the car AND provides the power necessary to engage the contacts for the primary battery. The car has to perform safety checks and various tasks before engaging the primary battery and the 12V provides the necessary power. It also provides the power to disconnect the primary battery in case of a malfunction or accident. Suffice it to say, that if the 12V battery is not providing adequate voltage, you'll be dead in the water just like a gas powered car. So, check that 12V battery routinely and replace it before you find yourself stranded! Even if you have enough power to turn on the radio and the dash lights up, it may not be enough to put it in gear and you could see multiple errors on the dash although not specifically about the 12V battery. Ask me how I know...
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    Robert Fernatt - EV, solar, and coffee aficionado. Also, cat servant.

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