Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: too expensive
Review: even $250 still too expensive, average sunshine/day 10 hours, than you can get 60w*10*365=219Kw per year, 10years you can get 2190Kw ,if some days rings, you can get the power from the Solar Battery, right now ,per KW power cost about $0.1~$0.15, means after 10years (evey day is sunshine), you still can't get the money back from the Solar Battery.
