The Enhansed flooded battery, acccording to the marketing, uses some carbon in the plate paste and helps prevent sulfation in partial state of charge usages.
PSOC usage is very hard on batteries.
I've no experinece with EFB, and not read too much about them.
The marine guys, who do not want to upgrade to Lifepo4 for their house battery banks, are largely raving about a 'carbon Foam' AGM called firefly.
These are said to be able to be cycled and left at a partial state of charge for extended periods without damage, but to return them to full capacity after such treatment requires a high amp charger than can hold and maintian high voltages until amps taper to low levels.
They are about 500$ for a group 31, and only come in limited sizes.
Apparently the patented firefly carbon technology is different than the EFB's and other Batteries that claim to use carbon in the plate paste to better tolerate PSOC operation.
Since modern vehicles are harder on batteries, than yesteryear, and are coming closer and closer to actual deep cycling of them, the PSOC resistance quest, is a good thing all around.
I've no personal experience cycling lead acid batteries with carbon incorporated into plate paste.
If interested here is some of firefly's marketing:
The only Carbon-foam AGM battery is the Firefly Oasis Battery. Now available for marine applications, it is capable of deeper discharges and longer life
oceanplanetenergy.com
I'm not suggesting the average joe needs a 500$ firefly in their daily driver just that it would be nice if the tech dribbles down to the automotive starting battery world, and prices become tolerable in time. I think the EFB is a start in that direction
and hope it proves true.
When AGMS were first marketed, they were claimed to be the salvation to sulfation.
So take it all with a grain of salt, as AGMs in the ~ 40 years since, have proven less tolerant overall of PSOC operation when never receiving a true full charge, than flooded.
