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Living with Off-Grid Solar Power
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Considerations When Selecting Appliances
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Living with Off-Grid Solar Power
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Considerations When Selecting Appliances
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Your basic vanilla flavored telephone instrument gets all the
power it needs from the phone company. If you want a phone with
more features, a cordless phone, an answering machine or some
combination of these it is worth your time to look
for one which runs from a 9-12V DC power supply (the ubiquitous
wall wart). Of course, you need to realize that these devices are
Because the phone company grounds their positive supply voltage, and
your power system grounds it's negative supply voltage, it is common
to run into 'ground loop' problems when powering telephones and
answering machines directly from a DC power system. If you have
a ground loop you will hear a buzzing noise in your telephone or on
recorded messages. It is possible to purchase a small and low-cost
unit that can supply a 'floating' DC supply to your telephone
and answering machine to solve this problem.