On 09/16/2015 10:15 AM, Bob F wrote:

They also use cordless phones, which
go dead with the power failure.

...pointless statement because there would be no power to the phone
modem.

all my home telco/ISP/WIFI equipment is on a UPS.

How big is your battery bank? We had a problem this summer where about
10,000 were without power for over three days. Can you operate that
long after the lights go out?

Cordless phones, modems, routers, and even car cell phone chargers almost always
work off 12V DC, so a good sized 12V battery could keep them going for quite a
while, and can be recharged from your car. You would need to make adapter cables
for the devices, and wire the house for that power.

NO! The wall-warts for our Panasonic cordless phones put out 6.5V. The
wall-warts for our cell phones put out 5V. The cable modem is 12V. I
cannot get at the wall-wart for the router to check its output voltage,
but it might be 12V also.

Perce