Examples
Examples
Try the starting example
- Interval site loads (kW)
- 2,5,4,1
- Interval import prices (USD/kWh)
- 0.1,0.4,0.35,0.1
- Interval duration (hours)
- 1
- Battery usable capacity (kWh)
- 5
- Initial stored energy (kWh)
- 0
- Battery power limit (kW)
- 3
- One-way charge/discharge efficiency
- 0.9
- Buy/charge at or below price (USD/kWh)
- 0.15
- Discharge at or above price (USD/kWh)
- 0.3
- Interval [grid energy,charge input,discharge output,end stored,cost] JSON
- [[5,3,0,2.7,0.5],[2.57,0,2.43,0,1.028],[4,0,0,0,1.4],[4,3,0,2.7,0.4]]
- Total grid cost (USD)
- $3.33
- Savings versus no battery (USD)
- $0.37
Try another scenario
- Interval site loads (kW)
- [3, 5, 4, 1]
- Interval import prices (USD/kWh)
- [0.1, 0.4, 0.35, 0.1]
- Interval duration (hours)
- 1
- Battery usable capacity (kWh)
- 5
- Initial stored energy (kWh)
- 0
- Battery power limit (kW)
- 3
- One-way charge/discharge efficiency
- 0.9
- Buy/charge at or below price (USD/kWh)
- 0.15
- Discharge at or above price (USD/kWh)
- 0.3
- Interval [grid energy,charge input,discharge output,end stored,cost] JSON
- [[6,3,0,2.7,0.6],[2.57,0,2.43,0,1.028],[4,0,0,0,1.4],[4,3,0,2.7,0.4]]
- Total grid cost (USD)
- $3.43
- Savings versus no battery (USD)
- $0.37
Calculation method
Calculation method
Interval [grid energy,charge input,discharge output,end stored,cost] JSON
Explicit threshold dispatch without export: charge at low tariffs, discharge against load at high tariffs; respect power/storage/one-way efficiency, no optimization claim.
Total grid cost (USD)
Explicit threshold dispatch without export: charge at low tariffs, discharge against load at high tariffs; respect power/storage/one-way efficiency, no optimization claim.
Savings versus no battery (USD)
Explicit threshold dispatch without export: charge at low tariffs, discharge against load at high tariffs; respect power/storage/one-way efficiency, no optimization claim.
Symbols and units
- a
- Interval site loads (kW)
- b
- Interval import prices (USD/kWh)
- c
- Interval duration (hours)
- d
- Battery usable capacity (kWh)
- e
- Initial stored energy (kWh)
- f
- Battery power limit (kW)
- g
- One-way charge/discharge efficiency
- h
- Buy/charge at or below price (USD/kWh)
- i
- Discharge at or above price (USD/kWh)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- User-supplied measurements and assumptions; Explicit threshold dispatch without export: charge at low tariffs, discharge against load at high tariffs; respect power/storage/one-way efficiency, no optimization claim. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.