### **Customer Economics**
- **Payback period to customer** (must be <5-7 years to drive adoption vs 10-12 years without VPP)
- **Customer acquisition cost** (CAC) vs lifetime value (LTV) from VPP contracts
- **Churn rate** (customers dropping out of program)
### **Technical Performance**
- **Dispatch uptime** (% of time batteries respond when called - must be >98%)
- **M&V accuracy** (actual delivery vs promised capacity)
- **Response time** (seconds to ramp from idle to full discharge)
### **Business Metrics**
- **Capacity secured** (MW under contract) vs **capacity deployed** (actual batteries online)
- **Revenue capture rate** (% of theoretical max revenue actually earned from optimization)
- **Gross margin** on VPP services (after customer payments, before overhead)
- **Platform leverage** (incremental margin as fleet grows)
### **Market Position**
- **Utility relationships** (# of signed contracts, quality of partners)
- **Installer network size** (distribution reach)
- **Device integrations** (# of battery manufacturers supported)
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