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Residential storage financial evaluation — 17 divisions with official 2026 prices
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| Size | Investment | Payback | ROI | NPV | IRR | Y1 Savings/mo |
|---|---|---|---|---|---|---|
| 5 kWhREC | MX$ 40,000 | 9.0 y | 138.2% | MX$ 3,324 | 11.2% | MX$ 390 |
| 10 kWh | MX$ 80,000 | 15.5 y | 5.1% | MX$ -42,381 | 0.5% | MX$ 390 |
| 15 kWh | MX$ 120,000 | N/R | -39.3% | MX$ -88,085 | -4.9% | MX$ 390 |
| 20 kWh | MX$ 160,000 | N/R | -61.5% | MX$ -133,790 | -8.7% | MX$ 390 |