SDG&E's baseline allowance represents the amount of electricity considered necessary for basic household needs. It determines how much of your usage is charged at the lowest tier rate.
Understanding your baseline is essential because exceeding it means paying significantly higher rates for additional electricity.
How Baseline Works
Your baseline allowance is calculated based on:
- Climate Zone: SDG&E has multiple baseline zones based on local climate
- Season: Summer (May-October) vs. Winter (November-April)
- Heating Source: All-electric homes get a higher baseline
Coastal San Diego has lower baselines than inland areas due to milder temperatures.
Finding Your Baseline
Your baseline allowance appears on your SDG&E bill. Look for:
- "Baseline Quantity" in the usage details
- Your baseline zone designation
- Daily baseline allocation in kWh
Multiply your daily baseline by the number of days in your billing period to get your total baseline allowance.
Tier Pricing Impact
Once you exceed your baseline:
- Tier 1: Usage up to 130% of baseline at the lowest rate
- High Usage: Usage above 130% at a higher rate
Given SDG&E's high rates, staying within baseline can save significant money.