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Topic starter
October 26, 2024 2:27 am
Looking at sizing a system for a off grid cabin.
I want and am looking at the EG4 3000EHV, 2 - eg4 ll-s 48v batteries and 6x550w solar panels. I need to power a fridge, microwave, kitchen appliances, small fans, and electronics like tv and phone charger. Wondering if im on the right track with the proper solar array and the bank of batterys i need for this smaller system.
This topic was modified 4 weeks ago by sparkied
October 28, 2024 3:19 pm
To provide you with an accurate answer, I would need the following information:
1. List All Loads and Calculate Power Requirements
- Identify all appliances, devices, and equipment that will be powered by the system.
- Record the wattage or amperage for each load; convert to watts if only amps are given (Watts = Volts × Amps).
- Categorize loads into continuous and intermittent.
2. Calculate Total Daily Load (in Watt-Hours)
- For each appliance:
- Determine the hours of daily use.
- Calculate the daily energy consumption: ∗∗Wattage×HoursofUse∗∗=Watt−Hours(Wh)perday**Wattage × Hours of Use** = Watt-Hours (Wh) per day.
- Sum the daily watt-hours for all devices to get the total daily load in watt-hours (Wh).
3. Determine Peak Load (Power Demand)
- Identify the maximum simultaneous load to calculate the peak demand (in watts). This is essential to ensure the inverter can handle the highest possible load.
- Add a margin (10-20%) to account for unexpected loads.
Example Summary of Load Calculation
| Appliance | Wattage (W) | Daily Use (hrs) | Daily Consumption (Wh) |
|---|---|---|---|
| Refrigerator | 150 | 12 | 1800 |
| Lights (5x20W) | 100 | 6 | 600 |
| Laptop | 50 | 8 | 400 |
| TV | 75 | 3 | 225 |
| Total Daily Load | 3025 Wh |
Peak Load: If refrigerator and all other devices run at once, total peak = 150 + 100 + 50 + 75 = 375W
