Est. Power Usage Calculation
The total power usage (kWh) for a 4-person family camping off-grid (without power hookups) is calculated based on the provided inputs. See the additional definitions and assumptions listed below for more information.
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HVAC
Calculated using the data below, HVAC operation is estimated at 8 hours per day during spring and fall, and 12 hours per day during summer and winter. Estimated consumption per hour is 1.66 kWh in Spring and Fall; 2.75 kWh in Summer/Winter. Extreme weather may result in the HVAC system drawing greater power.
|
|
SPRING
|
SUMMER
|
FALL
|
WINTER
|
|---|---|---|---|---|
|
HVAC use (hour/day)
|
8
|
12
|
8
|
12
|
|
Cabin temp.
|
68°F
|
68°F
|
68°F
|
72°F
|
|
Avg. temp.
|
75°F
|
85°F
|
75°F
|
55°F
|
|
Temp. difference
|
7°F (3.9°C)
|
17°F (9.4°C)
|
7°F (3.9°C)
|
17°F (9.4°C)
|
|
Power consumption (kWh/day)
|
13.25
|
33
|
13.25
|
33
|
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Water Heater
Water heater usage is estimated based on one 10-minute shower per person, per day, with the average shower temperature set at 104°F.
|
|
SPRING
|
SUMMER
|
FALL
|
WINTER
|
|---|---|---|---|---|
|
Avg. tap water
temp.
|
58°F
|
68°F
|
62°F
|
55°F
|
|
Consumption (kWh/day)
|
4.78
|
3.73
|
4.35
|
5.08
|
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Kitchen
Kitchen power usage is calculated based on the estimated usage below for all appliances, including the refrigerator, coffee machine, induction cooktop, range hood, and 3-in-1 microwave-convection-air fryer-oven.
|
|
FRIDGE
|
COFFEE MACHINE
|
INDUCTION COOKTOP
|
3-IN-1 MICROWAVE
|
|---|---|---|---|---|
|
Usage
|
Always on
|
2 times/day
|
1 hour/day
|
40 mins/day
|
|
Consumption (kWh/day)
|
0.62
|
0.044
|
1.75
|
0.528
|
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System & Appliances
System usage is separated into two categories:
A. Direct use: Accounts for trailer system (always on), cabin lighting, and ventilation fans running up to 4 hours per day.
B. Power Supply/Charging: Other on-board electronics (e.g., doors, steps, projector, stabilizers), as well as computers, cameras, mobile phones, and other gadgets.
Total usage is estimated at up to 2 kWh per day.
-
Weather
This parameter represents the effects of solar gain/ overall energy absorbed from sunlight, and is applied as a negative offset to reduce the total energy required.
|
|
RAINY
|
CLOUDY
|
PARTLY CLOUDY
|
SUNNY
|
|---|---|---|---|---|
|
PEAK SUN HOURS
|
1.5
|
2.5
|
4.5
|
6.5
|
|
GENERATION (KWH/DAY)
|
-2.25 kWh
|
-3.75 kWh
|
-6.75 kWh
|
-9.75 kWh
|