With all due respect, the table is intended to avoid language like "expensive" and give actual costs. People need to know the numbers. I do note the table has had 22 downloads which is nice to see.
Of course things will change. But I would bet my mortgage those changes would be relative. People can look that up easily enough.
As for the table going obsolete in four months, I am not sure what that means. The technology? The relative value of each different type?
Based on comments so far, it appears LifePo4 is inspiring interest. I am wondering if I included enough info. If I understand the comments, it is the most reliable. It is also the most easily maintained. I could modify the table to reflect these additions but used up all my attachment hours.
On a personal note LifePo4+ intrigues me the most because of its potential for solar. We are seriously thinking about going totally off-grid. In my research I found many of the manufacturers were start-ups funded by various means. Hopefully investors will put more money into these companies so they can ramp up production and potentially lower costs.
On another note I will start a new thread about actually testing some alternatives, but not until I have some concrete results.
Advanced wet cell lead acid designs are the most reliable battery available. Period. Nearly a century of experience with them. The latest lithium designs, those of the ferrous variety seem to be up and comers; but because they need electronic parts prone to failure embedded inside them to make them reasonably easy to maintain limits their respective reliability.
Tesla's latest battery banks, 10kWh(week) and 7kWh(day), at about $3,000 to $3,500, probably use that technology. Contrast that with wet cell batteries that provide that capacity for about the one-third the money. But, I hope the volume ramps up and prices begin to fall. The lithium's may require less overall maintenance and make solar or other off-grid options more urban.
If the discussion is now fixed off the grid installation then nothing beats an Edison cell. Can't hardly hurt them. Your grandchildren will still be able to use them.
I use my PAP machine nightly and I feel great!
Updated: Philips Respironics System One (60 Series)
RemStar BiPAP Auto with Bi-FlexModel 760P -
Rise Time x3 Fixed Bi-Level EPAP 9.0 IPAP 11.5 (cmH2O)