DO I NEED A BATTERY BACKUP SYSTEM?
No, you will not need batteries for storage. However, as the price of batteries comes down, and their benefits are better understood, batteries will likely become a more affordable and mainstream technology. So you can go solar now, and add batteries later, or do both!
If you live in an area with frequent blackouts, or having power is critical, you should speak with your local installer about battery backup systems. Battery backup systems do add costs to the overall project, but remember the incentives apply to the complete cost of the system.