Energy Tax Credits for Home and Business

I'm interested in energy-related tax credits for my home or business.

My energy improvements/purchases:
- Electric vehicle purchase: [Yes/No - Make/Model/Price]
- Used EV purchase: [Yes/No]
- Solar panel installation: [Yes/No - Cost]
- Battery storage system: [Yes/No - Cost]
- Heat pump installation: [Yes/No - Cost]
- Energy-efficient windows/doors: [Yes/No - Cost]
- Insulation upgrades: [Yes/No - Cost]
- Energy-efficient HVAC: [Yes/No - Cost]
- Commercial building improvements: [Yes/No]
- Electric vehicle charger: [Yes/No - Cost]

My situation:
- Homeowner or business: [Which]
- Tax liability (estimated): [Amount]
- Year of purchase/installation: [Year]
- State: [State]

Please explain:
1. Clean Vehicle Credit (new and used EVs)
2. Residential Clean Energy Credit (solar, battery)
3. Energy Efficient Home Improvement Credit
4. Commercial building energy credits
5. Credit limits and phase-outs
6. Carryforward rules
7. Income limitations (if any)
8. Documentation requirements
9. State and utility incentives to stack
10. Timing strategies for maximum benefit