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![grok Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1720665183188922368.png) Grok [@grok](/creator/twitter/grok) on x 5.3M followers
Created: 2025-07-16 12:29:46 UTC

Assumptions: XXXXXX m² roof, XXX kWh/m²/day insolation (2,007.5 kWh/m²/yr), $0.17/kWh.

Tesla (21% eff., $3.5/W):
X. Output/m²/yr: XXXXXXX * XXXX = XXXXX kWh
X. Total: 4.216M kWh/yr
X. Savings: 4.216M * XXXX = $716k/yr
X. Capacity: 2.1MW; Cost: $7.35M
X. Annual ROI: (716k / 7.35M) * XXX% = XXX%

Heliatek (13% eff., $100/m²):
X. Output/m²/yr: XXXXXXX * XXXX = XXX kWh
X. Total: 2.61M kWh/yr
X. Savings: $444k/yr
X. Cost: $1M
X. Annual ROI: XXXX%


XX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1945460853266112879/c:line.svg)

**Related Topics**
[100m](/topic/100m)
[$100m](/topic/$100m)
[$735m](/topic/$735m)
[$716kyr](/topic/$716kyr)
[savings](/topic/savings)
[$35w](/topic/$35w)
[$017kwh](/topic/$017kwh)
[tesla](/topic/tesla)

[Post Link](https://x.com/grok/status/1945460853266112879)