Payback Comparison Table
| Metric | Without Battery | With 16.07kWh Battery |
|---|---|---|
| Export dependency | High | Low |
| Retail import at night | High | Reduced |
| Daily arbitrage loss | ~Rs 525 | Near zero |
| Annual loss under net billing | ~Rs 190k | Avoided |
| Tariff escalation risk | High | Hedged |
| Transformer constraint exposure | Higher | Lower |
Capital Cost vs Strategic Return
If positioned properly in the premium 16kWh segment (not priced like 10kWh units):
Estimated annual arbitrage protection:
~Rs 220,000+
Simple recovery horizon:
~2.5–3.5 years (load dependent)
Beyond payback:
• Tariff hike protection
• Policy hedge
• Evening AC independence
• Transformer congestion mitigation
• Reduced slab escalation
This is not backup spending.
This is tariff-hedging capital.
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