Originally Posted by cat man do
I would seriously love details of this
PM me if you wish
Unfortunately no great mystery ... I was consulting my mate Andrew on his Catamaran
'Champolion' who runs his air conditioning (1 x 12000BTU) without a genset and totally relies on his Lead Crystal batteries
which are charged by his 60AH solar panels
array. He demonstrated start up and run ... cabin
cooled within minutes.
In the end I opted for a system which starts out using the genset to 'top up' batteries
in the afternoon IF THE SOLAR PANELS
(mine push about 45-50AH) have not filled the batteries.
Assuming batteries are not totally full and I need the genset to 'top off', we will start out driving 2 x 16000 BTU and 1 X 5000BTU into the 'Owner cabin' (large cabin) where we sleep ... at the same time charging
batteries viz. the 2 x Victron inverters (240AH)... max 1 hour will be required ... shut down the genset as well as 2 x 16000BTU's and maintain air (which is now cold) using the 5000BTU (230V) which runs at 2.2 ah AC (aprox.47ah DC on 12V House batteries) viz the inverters. (we are setting up the aircons to direct air to any part of the boat at full capacity or shared capacity ... you can imagine how quickly our cabin
will cool with an initial burst of 37000BTU.
Once we have determined it works, we will be changing our house banks to liquid crystal batteries (since we can run deeper into the battery
capacity without doing harm to the batteries) ... unlike our exide gels which do not want to be under 60% charge.
We have just placed the order for the units through Just Catamarans in Florida
Once we have done the install, we are looking to purchase
and install the MES 4000BTU which 'MAINTAINS' cool air at 18 ah. We are keen to do this more as a 'test' for ourselves as if then successful, will swap out the 5000BTU to another cabin in the boat (not often utilized) and rely on the 4000MES to cycle cool air during the night whilst we sleep.
Since we have the 'owners version cabin' in our boat, we are having to install a 'slide away' curtain where the 'bedroom archway' becomes the 'sitting area'. Ana hates the idea of a curtain which is visible, so I am having to have it made in a way where it slides out of sight and out of mind during the day.
We hope to keep cool air circulating around the area where we sleep ... the unit being installed under our bed
At this stage, the ONLY reason I have opted for the 5000 230V system over the MES 4000 12V system (for 'overnight maintenance') is due to the fact that it seems to still be a 'complex system' running 3 compressors which systematically shut down as the air cools eventually maintaining air utilizing only 1 compressor
at 18 ah DC.
Can't wait for these units to arrive