Are all amp hrs equal?
Say you have 230 amp hrs in 2 6vGC batteries and you discharge at a low amp rate say 1 amp so if you discharge to 50 percent SOC you should have used 115 amps in 115 hrs. If you then discharge at a h...
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Edit I swapped this over to the res fridge thread--
Hard to compare yourself with another RVer. You don't know if he chooses to use an electric kettle or a pot on the propane stove to boil water, eg.
The fridge is a killer all by itself. Say 8 amps to run it (if a big fridge---my 3.2 cu ft electric one in the TC draws 4.5ish.) with 65% on time out of 24 hrs. That is 125 AH a day right there.
We use about 70AH a day in the 5er in summer, but that gets close to 200AH a day in winter with more lights-on time, more TV time, and way more furnace time, which can hit 100AH a day by itself if it is cold out (say 35-40F).
So I carry 6 batteries in the winter and four in the summer. Hate to think how it would work with a res fridge in the winter. 300AH a day? Out of the bank of 6 batts to 50% can do, so now to recharge every day back to 90%.
That is going to take some big amps of charging with a big generator and take at least 3 hours. (Takes me two hours and 15 minutes to restore 200 AH as a 50-90 using 150amp charger and a 3000w gen to run the chargers)
Don't forget when it is cold your bank's AH capacity is much reduced from as rated at 25C/77F, so you are already hurting for battery.
Hard to compare yourself with another RVer. You don't know if he chooses to use an electric kettle or a pot on the propane stove to boil water, eg.
The fridge is a killer all by itself. Say 8 amps to run it (if a big fridge---my 3.2 cu ft electric one in the TC draws 4.5ish.) with 65% on time out of 24 hrs. That is 125 AH a day right there.
We use about 70AH a day in the 5er in summer, but that gets close to 200AH a day in winter with more lights-on time, more TV time, and way more furnace time, which can hit 100AH a day by itself if it is cold out (say 35-40F).
So I carry 6 batteries in the winter and four in the summer. Hate to think how it would work with a res fridge in the winter. 300AH a day? Out of the bank of 6 batts to 50% can do, so now to recharge every day back to 90%.
That is going to take some big amps of charging with a big generator and take at least 3 hours. (Takes me two hours and 15 minutes to restore 200 AH as a 50-90 using 150amp charger and a 3000w gen to run the chargers)
Don't forget when it is cold your bank's AH capacity is much reduced from as rated at 25C/77F, so you are already hurting for battery.
