Appliances (Off-Grid Projects)
The page is used to define electricity consumption for off-grid projects based on individual electrical appliances.
Purpose of This Tab
The Appliances page is used for off-grid and isolated systems where electricity demand must be calculated from the ground up. Instead of using monthly utility bills, users define consumption by specifying which appliances are used, how often they run, and how much power they consume.
This approach ensures accurate sizing of PV modules, batteries, and inverters for systems without grid connection.
Please note: This page is used to calculate the total consumption for an off-grid project. After calculating the values here, go back to the Energy Consumption page and enter all consumption items there to ensure they are reflected in the feasibility analysis.
What You Can Do Here
On this page, you can:
Add electrical appliances one by one according to usage
Select a preset appliance scenario for common off-grid use cases
Define appliance count, daily usage hours, and nominal power
View total daily and monthly energy consumption automatically
Reset appliance lists and start over when needed
Adding an Appliance
To add a new appliance:
Click Add New Item
Select a Category
Select or enter an Item
Define Count, Usage, and Nominal Power
The system calculates consumption automatically.
Category
The Category groups appliances by type, such as:
Lighting and Electronics
Kitchen Appliances
Communication Equipment
Medical Devices
Industrial Equipment
Other
Categories help organize appliances and simplify data entry.
Item
The Item represents the specific appliance.
You can:
Select from predefined appliances (e.g., LED TV, Washing Machine, Refrigerator)
Enter a custom item name when needed
Predefined items come with typical nominal power values, which can be adjusted.
Count
Defines how many identical appliances are used (e.g., 5 LED lights, 2 laptops, 1 washing machine).
The total consumption is multiplied by this value.
Usage (Hours per Day)
Defines how many hours per day the appliance is used.
Usage is entered in hours per day (h/day).
This value is critical for:
Daily energy demand
Battery sizing
Autonomy calculations
Nominal Power
Defines the rated power of the appliance in Watts (W).
This can be:
Auto-filled from predefined items
Manually adjusted to match actual equipment specifications
This value represents the average operating power, not peak or startup power.
Consumption
Consumption is calculated automatically using the formula:
Values are displayed as:
Wh/day per appliance
This value is calculated automatically and cannot be edited manually.
Total Consumption
At the bottom of the table, solarVis displays:
Total kWh/day
Total kWh/month
The values update instantly as appliances are added or modified.
These totals are used directly in:
Battery capacity calculations
Inverter sizing
Off-grid feasibility analysis
Presets
The Select a Preset dropdown allows users to quickly load predefined appliance sets for common use cases, such as:
Residential
Caravans and RVs
Camping Sites
Agricultural Applications
Outdoor Events
Remote Medical Facilities
Construction and Worksites
Disaster Relief Shelters
Research Stations
Military or Defense Camps
Portable Offices
Remote Education Facilities
When a preset is selected, solarVis automatically adds a predefined set of appliances with typical usage assumptions. These values can be modified, removed, or extended after selection.
Reset
The Reset button clears all appliances from the list and resets total consumption values to zero.
This is useful when changing the system concept or starting a new appliance configuration.
Related Pages
If you encounter any issues, feel free to contact us.
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