Actually, solid state batteries are just starting to hit the market now.  And yes, they are expensive.  https://solidstatemarine.com/

10 minutes ago, Glenn said:

Actually, solid state batteries are just starting to hit the market now.  And yes, they are expensive.  https://solidstatemarine.com/

 

I saw these on another fishing forum I frequent.  Really pricey but may be the future of battery technology.  Eventually they will come down in cost and there will be more companies in the market.

1 hour ago, Glenn said:

Actually, solid state batteries are just starting to hit the market now.  And yes, they are expensive.  https://solidstatemarine.com/

I've been reading the specs and I don't see many advantages.  They say life time 3000 cycles.  That's less that's LifePo4.  They may have a slight safety advantage.   They can deliver 250 amps continuously which is impressive but my trolling motor only needs 50 amps.  The specs also says it has low temperature charging protection at 32F so charging temperature is apparently an issue.