battery charge/draw overnight

[Treasurefish]

this may seen like a silly question to some, but something on my mind every time i'm at anchor.

the boat is 2008 searay 310 with 4 bateries. at anchor in the evening should i be able to have anchor light, a couple interior lights, and both fridges running all night and expect batteries to start me in morning?

i was told to always keep both battery switches on. can i turn one off, or will this simply kill those batteries dead, leaving the other 2 charged (not good for batter life)

also does anyone kmow the minimum volts for starting ?

any advice would be appreciated. thanks

 

[tbirdvet]

I believe 2 batteries are the house batteries and the other two for engine so even if you ran down the two the two remaining could start the engines.

 

[capecodcruiser]

Tbird hit it on the head. If you shut everything but the fridge(s) down at night, you should be ok, depending on what size/condition your batteries are. If all else fails, your emergency start switch will allow you to start one of your engines which will charge your other batteries to start the other engine. Give it a shot and see what happens!