I don't know how exactly to answer your question. Basically, yes hold and MM are exactly the same at anything above 50%. I would think that if you were going up a really steep mountain WHERE you would start dipping below 50% soc, hold mode wouldn't be able to maintain the battery SOC the way MM would.
Originally Posted by Darren Donovan
If I were to make an analogy for you regarding how I think each mode works it would go like this:
Lets say you've hired a kid to operate your lemonade cart. In scenario a you would tell the kid to "hold" 8 cups of poured lemonade ahead of time for customers as they come. In this scenario 8 cups may not be enough for a steep crowd during the lunch hour. He would try, but since you're paying him $7/hour he only will work so hard for you.
In scenario B, you tell the kid to keep at least 5 cups of lemonade and his life depends on it, and he will be compensated additionally for working at peak efficiency when it gets really busy at lunch. So even tho there was 8 cups at the start, he slacks a bit, but goes balls to the walls as soon as it gets down to 5 cups, cuz he knows he's gonna get paid awesome at end of the day.
At the end of a super large lunch day, kid A has only 1 cups extra, and is done. Kid B has only 4 cups, but sold a ton more and would've continued keeping as many as he could throughout a very long drawn out lunch rush.
That's how I think it works anyway. :-)
Aloha! Codyozz Username(Voltstats): Voltacious
2013 Black Volt, pkg 1 & 2, Polished rims | Lifetime MPG: 110
Purchased Jul '13. Mileage numbers as of Apr '15: 21,338 ttl miles | 14,976 EV miles