The Professor reviews the hqst 20A 40A and 60A mppt solar charge controllers for use with Lead or LiFePO4 12v 24v 36v 48v ...

Modern energy use is becoming more flexible. People no longer need batteries only for cars, flashlights, or small backup ...

This report is a follow-up to our how-to tech article on updating the dual-battery system in a 1995 Ford F-350 crew-cab dually. For any car or truck with a 12-volt charging system (for operating its ...

Q: What do you think of solar battery chargers to maintain a little-used car? The car sits outside and there is no power outlet nearby. I read that you recommended the CTEK unit, but that looks like ...

The sun is finally making a comeback, which means festivals, garden parties and – most thrillingly of all – the prospect of harvesting free electricity from the sky using one of the best portable ...

A solar charger with a controller is recommended to maintain the battery of a little-used car. Honda's maintenance minder indicates when service is needed, but brake fluid is generally replaced every ...