12kW
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Perfect for Large Households with High Energy Demands
A 12kW solar system is an excellent choice for large homes or businesses in Adelaide with high daily energy consumption of 40-55kWh per day. This system provides substantial power generation to meet your energy needs, significantly reducing your reliance on grid electricity and offering excellent long-term savings.
Maximising Self-Consumption for Maximum Savings
With feed-in tariffs now as low as $0.05 per kWh, exporting excess solar energy to the grid yields minimal financial returns. The real value of solar comes from self-consumption—using the energy you generate during daylight hours to power your home or business. A 12kW system allows you to power energy-hungry appliances and devices during the day and store excess energy with an optional battery.
Ideal for Low, Medium, or High Daytime Energy Usage
Whether your energy consumption is low, medium, or high during the day, a 12kW solar system is flexible enough to provide significant savings. Below, we outline different savings scenarios based on these usage patterns, including the ideal average daily consumption for each case.
Savings Scenario for a 12kW Solar System
We’ll explore potential savings scenarios for homes with low, medium, and high daytime consumption. The calculations are based on $0.40 per kWh grid electricity costs and a $0.05 per kWh feed-in tariff.
Scenario 1: Low Daytime Consumption (30% Daytime / 70% Night-Time)
Ideal Average Daily Consumption: 50-55kWh/day
For households or businesses that use 50-55kWh per day with low daytime consumption, a 12kW system can cover much of your daytime needs, while exporting a significant portion of excess energy to the grid.
1. Without Solar (100% Grid Electricity)
- Daily Electricity Usage: 55kWh
- Cost per Day: 55kWh x $0.40 = $22.00/day
- Annual Cost: $22.00 x 365 = $8,030/year
2. 12kW Solar System (Low Daytime Consumption)
- Solar Generation: A 12kW system generates approximately 48-52kWh per day on average in Adelaide.
- Daytime Self-Consumption (30%): 30% of 55kWh = 16.5kWh/day (covered by solar)
- Excess Exported to Grid (70%): 31.5-35.5kWh/day exported at $0.05 = $1.58-1.78/day
- Savings from Self-Consumption: 16.5kWh x $0.40 = $6.60/day
- Feed-In Tariff Earnings: $1.58-1.78/day
- Total Daily Savings: $6.60 + $1.68 = $8.28/day
- Annual Savings: $8.28 x 365 = $3,022.20/year
Shifting Energy to Daytime for Extra Savings
Shifting more energy usage to daylight hours (e.g., to 40% daytime consumption) can increase savings:
- Daytime Self-Consumption (40%): 40% of 55kWh = 22kWh/day
- Savings from Self-Consumption: 22kWh x $0.40 = $8.80/day
- Annual Savings: $8.80 x 365 = $3,212/year
Scenario 2: Medium Daytime Consumption (50% Daytime / 50% Night-Time)
Ideal Average Daily Consumption: 45-50kWh/day
For homes or businesses consuming 45-50kWh per day with a 50/50 split between daytime and night-time usage, the 12kW solar system can cover a substantial portion of your energy needs during the day, significantly reducing your reliance on grid electricity.
1. Without Solar (100% Grid Electricity)
- Daily Electricity Usage: 50kWh
- Cost per Day: 50kWh x $0.40 = $20.00/day
- Annual Cost: $20.00 x 365 = $7,300/year
2. 12kW Solar System (Medium Daytime Consumption)
- Solar Generation: 48-52kWh per day
- Daytime Self-Consumption (50%): 50% of 50kWh = 25kWh/day (covered by solar)
- Excess Exported to Grid (50%): ~23-27kWh/day exported at $0.05 = $1.15-1.35/day
- Savings from Self-Consumption: 25kWh x $0.40 = $10.00/day
- Feed-In Tariff Earnings: $1.15-1.35/day
- Total Daily Savings: $10.00 + $1.25 = $11.25/day
- Annual Savings: $11.25 x 365 = $4,106.25/year
Shifting More Usage to Daytime
By shifting more energy consumption to daytime hours (e.g., to 60% daytime consumption), you can further increase your savings:
- Daytime Self-Consumption (60%): 60% of 50kWh = 30kWh/day
- Savings from Self-Consumption: 30kWh x $0.40 = $12.00/day
- Annual Savings: $12.00 x 365 = $4,380/year
Scenario 3: High Daytime Consumption (80% Daytime / 20% Night-Time)
Ideal Average Daily Consumption: 40-45kWh/day
For households that use 40-45kWh per day with high daytime consumption (80% of energy during the day), a 12kW system can cover nearly all of your daytime energy needs, maximising your savings.
1. Without Solar (100% Grid Electricity)
- Daily Electricity Usage: 45kWh
- Cost per Day: 45kWh x $0.40 = $18.00/day
- Annual Cost: $18.00 x 365 = $6,570/year
2. 12kW Solar System (High Daytime Consumption)
- Solar Generation: 48-52kWh/day
- Daytime Self-Consumption (80%): 80% of 45kWh = 36kWh/day (covered by solar)
- Excess Exported to Grid (20%): ~12-16kWh/day exported at $0.05 = $0.60-0.80/day
- Savings from Self-Consumption: 36kWh x $0.40 = $14.40/day
- Feed-In Tariff Earnings: $0.60-0.80/day
- Total Daily Savings: $14.40 + $0.70 = $15.10/day
- Annual Savings: $15.10 x 365 = $5,511.50/year
Maximising Daytime Usage
If your home can shift even more usage to the daytime, such as 90% daytime consumption, you can further boost savings:
- Daytime Self-Consumption (90%): 90% of 45kWh = 40.5kWh/day
- Savings from Self-Consumption: 40.5kWh x $0.40 = $16.20/day
- Annual Savings: $16.20 x 365 = $5,913/year
Total Benefit Over Grid-Only Use:
- Low Daytime Consumption (50-55kWh): $3,022.20/year saved
- Medium Daytime Consumption (45-50kWh): $4,106.25/year saved
- High Daytime Consumption (40-45kWh): $5,511.50/year saved
An 12kW solar system offers substantial savings across various consumption patterns. By shifting more energy use to daylight hours, households with high daytime consumption can save up to $5,511.50 per year, while those with medium or low daytime usage can also enjoy significant savings.
Unlock the Full Potential of Solar Savings
For a detailed, tailored recommendation on how a 12kW solar system can help you maximise savings based on your energy consumption patterns, try our AI Home Energy Analyser. It provides data-driven insights to help you find the perfect solar solution.
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