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Solar GreenTech 1200 User Guide
Battery information showing voltage to percentage ratio chart including safe
operation and care please Fig 17: and Fig 18:
Example
When running camping fridge that is normally 45w the fridge will only peak at
45w in normal conditions for approximately 20 minutes of every hour and the
remainder of the time the fridge will be on standby at around about 7w. This
means the total amount of wattage per hour on a 45w fridge is calculated
divide 45w by 3 equals 15w per hour.
If you run the above fridge for 1 hour from the 12v supply only you will use 15w
per hour.
Divide 15w by the 1280wh battery capacity and you will get approximately 85
hours run time from the battery
If you run the same fridge from the 240v invertor supply you will use 15w for
the fridge and 8w from the inverter totalling 23w
Divide 23w by the 1280 battery capacity and you will get approximately 56
hours from the same battery and fridge.
It is therefore advised if you have the two options available to run your fridge
which is normally the case with camping equipment we would recommend that
you used the 12V socket and leave the inverter turned off to give longevity
between charges. However you also enjoy the luxury of being able to run 240v
appliances where 12 Volt input is not possible. For example running
appliances such as power tools, lawn mowers, grass stri
mmer’s, lap top
charges, hair dryers, hair straighteners and much more items that you would
use for shorter periods of time that needed more power.
