I lost you?? The batteries I'm refering to cost $200 each and there are 10 or 15 of them (maybe more) for a solar panel array depending on energy requirements. The more juice you use in your house or business the more panels and batteries you need. The more panels and the more batteries the more initial cost. My close friend paid 45K for his solar panels and back up system including installation. Even if he paid 2K a year for electricity before the solar system was installed it would still take him over 20 years to recoup his money....and that's if batteries never need replacement (not likely) and if there are no issues with the solar panel (also not likely).