Hi Susan,
Are you connected to a 15 amp shore power supply?
If so, the maximum you can use in one day is 43 kwh. At $0.12 per kwh that is $5.18 per day.
If you are connected to a 30 amp supply that doubles to 86 kwh and $10.36
The 1500 watt heater, assuming 0.12 per kwh is going to use $0.18 for every hour it is connected and running.
If you are running the fridge on electric it will consume 6 kwh per day on average. That at 0.12 is $0.72 per day.
The water heater is about 1200 watts and if left on with zero water use will cycle every 4 hours and run for 15 minutes for each cycle. That is 1.5 kwh per day so a cost of $0.18 per day. Of course when you actually use water it may run for 90 minutes to total recover. Assuming one full tank used per day that adds an additional $0.18. The daily total for the water heater works out to $0.36 per day.
Lighting in the RV requires the converter to recharge the battery bank. Call it 100 watts per hour so 2.4 kwh per day or $0.30 per day
When I go to the RV park I connect to a 50 amp supply and my peak demand is 7000 watts. If I kept at that level then the daily totals are 168 kwh and $20.16 per day. Of course I don't use that much because that is the peak level, not the average for the day.
Here is a summary of your use without the electric heater:
$0.72 for the fridge
$0.36 for the water heater
$0.30 for lighting
$1.38 per day.
Then there is running the computer, tv and other entertainment devices.
Myself, when plugged into a 15 amp circuit I use about 20 kwh per day, or $2.40 for all my needs. I do run entirely on electric for space heating, water heating, and cooking.
As it is cold here now (36 for the daily high and 28 for the low tonight) I'm now plugged into two 15 amp circuits and am probably using $4.80 per day.
So, yes, the owner will be seeing a much higher bill and you should offer to reimburse him for the costs. See if he will take a dollar a day.
