Batteries aren't one-size-fits-all, and neither is the way they're wired to your house. Here's what you should know about AC- and DC-coupling. When we think about solar panels and batteries, we don't ...

My central air conditioner is 16 years old, noisy, and probably inefficient. I want to replace it with a quiet, efficient model. What are the best ones available for 2011 and which provide the best ...

With the arrival of summer, the need for air conditioning in homes becomes increasingly evident. In North India, temperatures soar from April through September-October, making AC a necessity. However, ...