This browser worksheet models three-factor proportional relationships for DC energy storage systems. Rather than computing continuous discharge current in amperes from cell amp-hour capacity ($I = C_{\text{Ah}} \times \text{C-Rate}$) or estimating cycle life degradation across lithium iron phosphate (LiFePO4) vs NMC chemistries, this interface calculates the Engineering Suite proportional ratio model.

### Mathematical Pipeline The interface calculates three output metrics directly from numerical inputs:

- **Nominal Cell Baseline ($V_1$):** Baseline numerical parameter (default set to 100). - **Cell Discharge Multiplier ($V_2$):** System multiplier coefficient (default set to 20). - **Derating Divisor ($V_3$):** Divisor rate factor, restricted to a minimum of 0.01 (default set to 5).

**Formulas:** - **Scaled Capacity Metric:** Evaluated as $(V_1 \times V_2) / \max(0.01, V_3)$, determining the principal rating score. - **Geometric Median Index:** Evaluated as $\sqrt{\max(0, V_1 \times V_2)}$, representing the geometric root. - **Cell Proportion Score:** Evaluated as $\min(100, \max(0, [V_1 / (V_1 + V_2)] \times 100))$, indicating the primary baseline percentage.

### Worked Numeric Example A battery pack technician evaluates the following test values: - Nominal Cell Baseline ($V_1$): 120 - Cell Discharge Multiplier ($V_2$): 25 - Derating Divisor ($V_3$): 5

**Step-by-Step Evaluation:** 1. **Scaled Capacity Metric:** $(120 \times 25) / 5 = 3,000 / 5 = 600.00$. 2. **Geometric Median Index:** $\sqrt{120 \times 25} = \sqrt{3,000} \approx 54.77$. 3. **Cell Proportion Score:** $[120 / (120 + 25)] \times 100 = (120 / 145) \times 100 \approx 82.76\%$.

### Privacy and Client-Side Execution All calculations run in client-side JavaScript using standard floating-point operations. No battery chemistry specs, cell voltages, or project inputs are transmitted across any network.