Low battery voltage than usual

[Frankycheechoo]

End of last year I installed a new alternator 135amp and battery, today was pretty hot day for cruising and noticed on my aeroforce gage the battery dropped to 13.2-13.5 after cruising for abit IAT was about 88-100 car ran nice just wanna make sure I’m not frying this alternator again is. Is this normal Cus it was hot out ?


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[hotcobra03]

On my car I had noticed a difference from battery volts tested at battery 14.1. But only low 13s at power point in car.

I upgraded the ground from battery to radiator support.

This helped with in car voltage.

I see 14 plus now for most of my ride. But still at night I notice head lamps dim from time to time ,

This is on oem alt,