Archive for March 2020

Making an OBD-II Solar Trickle Charger

I have been travelling quite a bit for the last year or so and have not been able to drive my car as frequently as I would have liked. As a result, I often left my car at the airport parking lot for a week at a time. This is not great for modern cars since many electronics continue to draw power even when the car is turned off. The stand-by current draw can be quite significant depending on the type of electronics the vehicle has. This constant current draw along with lead-acid battery’s relatively high self-discharging rate create a perfect recipe for a drained battery if the car is left parked for some prolonged period of time.

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