Yep, the Maha comes with a cable for a 12V DC power source, which is very handy for cars and many solar chargers.

But the La Crosse is probably a better solar charger in general because you can set the current down to 200mA/battery if necessary. (The BC-900 is much more sophisticated than the Maha, but you're unlikely to be using most of its fancy features in an emergency.)

However, if I lost power, I would likely first charge this or a larger capacity SLA and then use it to power my rechargers.