yellow and red top question

[ramsizzle 10+ year member]

i was looking to get a red top under the hood and a yellow top for the back ... how many volts do each run at when the car is on ... edit: my bad lol didnt look where i put my fingers typooo 12.8 volts.

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[JimJ 5,000+ posts]

its like 23.8 when its off i think.

If you have them wired it series, which you shouldn't...wire them in parallel.

Voltage should be around 14.4vdc, or whatever your alternator charges them at.