Originally Posted by feebs
Original Lagoon chargers are still installed. It has 4 x Braille 368 Lah & a BMU 150.
Not to sure about regulators on alternators - will have a look & get back to you.
The Braille lithium batteries seem to be a "drop in" type for the automotive/ racing
market. Yours is the first yacht that I've seen with this brand.
They are quite expensive; I hope this equates to quality.
I don't know much about lithium battery systems; hence my query. Broadly, there seems to be two "schools of thought" regarding lithium. The first school
just drops in Lithium as replacements
for lead acid. If they work
, then all is good. The other school
( as examples in the link in my previous thread) says that, while a drop in system will work, the lead acid charging regime will shorten the life of lithium batteries and perhaps make them more hazardous. Therefore, you really need to change your chargers, replace both alternators or fit external regulators, perhaps new solar controllers and incorporate a dedicated Battery Management System. Some recommend wiring
upgrades, alarms, flashing lights and a whole bunch of gold plated electronics
. The bottom line is to protect the precious batteries from anything over 14 volts during charging and under 11.8 volts during discharge.
I understand the latter bells and whistles will provide a great system, but I wonder weather
I personally wish to go to this level of complication and expense. Likewise, I don't wish to spend a lot of money
on lithium batteries as a replacement for my gels and find that the existing system of charging kills them prematurely. I'm looking for "middle ground"; a system that works, will last well and isn't overly complicated. I'm thinking it doesn't exist for lithium batteries.
If your system achieves this, simply, I'd love more details.
PS. We have 1100w of solar in a similar installation
as Monte's. Mounted on 80 X 50mm aluminium box section cross beams supported from roof and from davits
on SS poles/brackets. We ran wires back through the hole for rear steaming light. This was remounted on back of panels
. Provides ample power
as well as much desired shade.