Interested thread with may diverse opinions but my two cents worth is that to a certain degree you need to stop worrying about hard science and start worrying about what you experience when out on the water
My own experience: At the beginning of the season I upgraded the house batteries to 2 x 150 Ah Flooded Deep Cycle lead acid maintainable (I hate maintenance
free) and I replaced the engine
start battery for good measure too. In addition I added a Balmar
MC-614 external alternator regulator
to our Electromaax 80amp alternator. The nett result, forgetting the science, is that I can now run my fridge much longer after running the engine
for an hour or two. The objective was achieved, colder beer
for longer :-)
In my opinion, making the buy/no-buy decision based on futures is a bad idea - you will probably end up never buying
. This applies to everything in life from buying
a home appliance to buying a car to buying that laptop
you had your eye on. So unless there really is a compelling reason to hold off upgrading your LA batteries and charge system then do it now and enjoy the benefits it brings. Lead acids are cheap
, so what if you throw them away in a couple of years, you probably would anyway if you use them a lot.
Investing in a totally new technology charge system and battery type is a long way off and will cost you a lot of money
. A vast majority of boats have and electrical system
designed around today's alternators and lead acid batteries and/or gel. In 5 or 10 years time new boats will have new technology, but in my old boat I'll stick with old technology as long as it's doing the job I need it to do. "if it ain't broke don't fix it"