Across
- 4. the most cost efficient solar installation method
- 5. long lasting rechargeable battery
- 7. blue, variety, wafers
- 8. unit of energy
- 9. connected to grid but with backup power
Down
- 1. solar panels don't need batteries!
- 2. black, single, ingot
- 3. a structure to hold the panels together
- 6. to convert dc to ac power
- 7. rate at which work is done