Being new to managing a battery
bank and inheriting a poor one just under 4 weeks ago here are some questions from a newbie. Given that I have no electrical
knowledge this is a steep learning
Here is the situation I inherited
The start battery
was replaced by previous owner after my purchase
prior to me taking over the boat
old one had failed. It was poorly reconnected and all wiring
to all batteries
Start battery wet 12v 100ah new
2 x AGMs 150ah offline at the moment due to the system being ripped one reads 6.8v the other 9.2v
A 120w solar
panel feeding into a CONERGY SCC1D Vision Charge controller I assume cannot find manual on net will have to contact Conergy
Here are my questions
1. Could the failed start battery pulled the AGMs down to such low volts and are they stuffed?
2. Then being offline for 3mths left them is a poor state?
3. I have to run a plotter,4kw radar wind
instruments hydraulic autopilot
and an Isotherm
3700 fridge in the tropics..... I am very frugal with lighting
and power usage...happy to go to bed
early n get up early. I figure I need a bank of about 400-500ah but to charge that up I am concerned that 120w solar
will not charge me up enough. I am yet to work
out my rate of discharge as I am getting my head
around this electrics stuff.
4. Some of my reading suggests that a larger bank is better because you draw less from it overall but them other sources say that larger is not better????
5 Is it sensible to get a small Honda
or Yammie generator
and a 240v smart charger
for topping up the battery as I don't like the idea of running the diesel
just to charge battery ok if it is being used to motor/motorsail
Generally very confusing from a newbie when you are trying to get your head
around it from books
. I learn best when I sit down over a topic/ object with someone who knows what they are doing.
I head back to the boat
in late January to sort it out and provision to start cruising.
Any help appreciated