- Limit engine start cycles to approximately 10 total cycles per day, on average. Occasionally cycling the starter system more than this will not cause damage unless it becomes a long-term trend.
- Assuming seven additional cycles per day are not exceeded (assumed ten total cycles per day), any shutdown with a duration in excess of one minute will result in overall cost savings.
- Limit electric accessory use during shutdowns, particularly during longer shutdown periods.
- Drive more than five miles between start cycles to ensure the battery is fully charged.
Nothing wrong with auto start/stop by itself, just let the driver turn it on and off, and remember the state between drive cycles.
It comes in handy in some situations while being a nuisance in others, and that's when you add a button.
ANL offered the following guidance in 2015:
(https://publications.anl.gov/anlpubs/2015/05/115925.pdf)