A 70kW off-grid solar power system is a complete and self-sufficient power system that can fulfill the high electricity requirements of large residential properties, large commercial establishments, and remote areas disconnected from a grid supply. This system provides solar power, which is renewable and steady, thereby minimizing the use of hydrocarbon fuels drastically reducing costs on electricity.
| Component | Description | Quantity |
|---|---|---|
| Solar Panels | Photovoltaic modules that convert sunlight into direct current (DC) electricity. | 220 pcs |
| Inverter | Converts DC electricity from the solar panels into alternating current (AC) suitable for household appliances. | 1 set |
| Battery Bank | Stores excess energy generated during the day for use during nighttime or cloudy periods. | 110 units |
| Charge Controller | Regulates the voltage and current coming from the solar panels to prevent overcharging of the batteries. | 1 unit |
| Mounting Structure | Supports and positions the solar panels at optimal angles for maximum sunlight exposure. | 1 set |
| Cabling and Connectors | Facilitates electrical connections between components, ensuring safe and efficient power transmission. | As required |
| Component | Specification |
|---|---|
| Solar Panels | Polycrystalline 320W panels, 220 units, total capacity 70.4kW |
| Inverter | 70kW off-grid pure sine wave inverter, 1 unit |
| Battery Bank | 12V 250Ah lithium iron phosphate (LiFePO4) batteries, 110 units, total capacity 330kWh |
| Charge Controller | 384V 100A MPPT charge controller, 1 unit |
| Mounting Structure | Adjustable for flat ground and roof installations, 1 set |
| Cabling and Connectors | UV-resistant, weatherproof cables and MC4 connectors, as required |
The daily energy production of an 80kW off-grid solar system varies based on geographic location and local solar irradiance. Below is an estimated daily energy output for selected regions:
| Region | Solar Irradiance (kWh/m²/day) | Estimated Daily Energy Production (kWh) |
|---|---|---|
| Nigeria | 5.5 | 385 |
| Pakistan | 5.0 | 350 |
| South Africa | 5.5 | 385 |
| Iran | 5.0 | 350 |
Note: These values are approximate and can vary based on specific location, weather conditions, and seasonal variations.
An 80kW off-grid solar system can power a variety of household and commercial appliances. Below is a list of common appliances along with their approximate energy consumption:
| Appliance | Power Consumption (W) | Estimated Daily Usage (hours) | Daily Energy Consumption (kWh) |
|---|---|---|---|
| LED Lighting | 10 per bulb | 5 | 0.05 per bulb |
| Refrigerator | 150 | 24 | 3.6 |
| Air Conditioner | 2000 | 8 | 16 |
| Washing Machine | 500 | 1 | 0.5 |
| Dishwasher | 1200 | 1 | 1.2 |
| Television | 100 | 5 | 0.5 |
| Microwave Oven | 1000 | 1 | 1 |
| Electric Oven | 3000 | 2 | 6 |
| Water Pump | 1500 | 2 | 3 |
| Computer | 200 | 8 | 1.6 |
Note: Actual energy consumption can vary based on appliance efficiency and usage patterns.
The return on investment (ROI) for an 80kW off-grid solar system depends on various factors, including initial installation costs, local electricity rates, and system performance. Below is a simplified ROI analysis:
| Parameter | Value |
|---|---|
| Initial Investment | $175,000 |
| Annual Energy Production | 140,000 kWh |
| Average Electricity Rate | $0.10 per kWh |
| Annual Savings | $14,000 |
| Payback Period | 12.5 years |
| Estimated System Lifespan | 25 years |
| Total Savings Over Lifespan | $350,000 |
| Net Profit | $175,000 |
