Determine the size of Marine Power
require by adding up the loads you expect to run off the Marine Power Inverter.
The power required is derived from your 12 Volt batteries. Once you determine
the Marine Power Inverter that provides the power you need, divide that wattage
by 12 volts to see how many amperes your batteries will need to provide. How
long do you want the Marine Power Inverter to provide power for your loads?
Your batteries will have ratings for Ampere Hours that will allow you to
determine how long your Marine Power Inverter can properly deliver the power
you need. The Marine Power Inverter provided by MarineandMarineAccessories.com are
rated for long term load. Short term load like starting a motor is provided by
the Marine Power Inverter as well and there is a rating for Surge Power which
is that short duration extra load.
So once you have determined the wattage you
want for your Marine Power Inverter, have determined how long you want the
power to be supplied by your battery bank, you will need to select the size and
number of batteries to provide that power to the Marine Power Inverter. An
Important thing to remember is that even a 400 watt Inverter will draw over 30
amps of current from the batteries. Most batteries have amp hour ratings that
are based on the rating of the battery divided by 20. A 100 amp hour battery is
rated using a draw of 5 amperes for 20 hours. If you are drawing substantially
more current then the work done many years ago by a scientist named Peukert can
give an indication of the amp hours you might expect. from your batteries
powering your Marine Power Inverter.
I personally use a Group Size 31 Duracell
Battery that is available through Sam's Club for a great price. This battery
will provide 110 amp hours with a one ampere draw. If I draw 50 amps then the
amp hour rating is about 73 amp hours. So if I run a very low load of one amp
the battery will provide that power for 110 hours. However, If I am using
around 600 watts from my Marine
Power Inverter, I will only be able
to run for about one and one half hours per battery. With batteries in parallel
you just multiply the one battery time of operation by the number of batteries
in your battery bank. If you wanted to run for 9 hours you would need six of
If you are not certain about your loads or your
needed battery bank, please contact me through this website and we will work
together to select the correct Marine Power Inverter as well as the type and
number of batteries you need to meet your needs. I have extensive experience
with electric vehicles of all types and decades of battery experience. You can
be confident that when you get your Marine Power Inverter from
RVandMarineAccessories.com you will be able to safely and securely run your AC
items off grid.
To avoid electrical
accidents the Marine Power Inverter should be mounted in a location where it
will not be subjected to liquid water, flooding or submersion.