rv refrigerator
I have two house batteries that one has 975 cranking amps and the other has 675 cranking amps and my starting battery that has 900 cranking amps.Only one has the reserve on it and it says 135.how long...
Forum Discussion
Door defroster can be disabled on most fridges, to reduce the DC draw.
For a minimalist boondocker, DC draw of the fridge in LP mode is the biggest item of energy budget. It might draw mere 1A, but it does this day and night, cycling 50/50 or more or less, depending on ambient temperature, and it adds up to 12 AH per 24 hours or even more. LP fridges are shallow front to back, all the cold air spills out every time you open the door, and it immediately starts cycling again.
If you don't use a furnace, all other items like laptop or small TV or LED lights (LED is a must if you want to conserve energy) - will draw 15-30 AH per 24 hours. So a 135 AH battery with usable charge 65 AH will last 2-3 days. A weekend.
Lawrosa is right, - make 100% sure that your battery indeed says "135 AH @ 20 hours rate". Because 135 AH is a pretty big battery that weighs 80-90 lbs. The chances are, you have something smaller.
For a minimalist boondocker, DC draw of the fridge in LP mode is the biggest item of energy budget. It might draw mere 1A, but it does this day and night, cycling 50/50 or more or less, depending on ambient temperature, and it adds up to 12 AH per 24 hours or even more. LP fridges are shallow front to back, all the cold air spills out every time you open the door, and it immediately starts cycling again.
If you don't use a furnace, all other items like laptop or small TV or LED lights (LED is a must if you want to conserve energy) - will draw 15-30 AH per 24 hours. So a 135 AH battery with usable charge 65 AH will last 2-3 days. A weekend.
Lawrosa is right, - make 100% sure that your battery indeed says "135 AH @ 20 hours rate". Because 135 AH is a pretty big battery that weighs 80-90 lbs. The chances are, you have something smaller.
