Re: Fuel Cell
Ive been running large fuel cells for about 40+ years on my boats.
The current fuel cell installation has the storage capacity of ~4100 kWh using a fluid that has 140K Btu/gallon (41kwh).
Its very convenient, easily refillable throughout the entire world.
This fuel cell system is manual however as when the total battery bank voltage drops to ~70% of full charge I have to manually turn a switch ... unlike a special fuel cell that can be automatic 'on'.
The electro/chemical efficiency when comparing the newer fuel cells is about the same: 1BTU = 1BTU or 1kwh = 1kwh (ignoring slight differences in 'conversion' losses).
My present fuel cell system is a 100 gallon diesel fuel tank.
The current methanol fuel cells (~1.7Kwh, ~$6000 ea.) are slightly smaller in output than a total of 2 square meter solar panels (~$2000 retail), or approximately what comes out of a portable Honda 2000w generator (~$2000 retail).