[aprssig] 8 hour Backup Power Rule

James Jefferson Jarvis jj at aprsworld.net
Tue Mar 18 12:07:03 EDT 2008

> Here's a more practical question - at what level of load does a
> generator produce the most power per unit of fuel?

100%, or close to it.

Many remote sites are switching from prime power generators to generators that 
charge battery banks. The battery then run inverters. Fuel consumption is cut 
by a large portion and generator lifetime is greatly increased. 

Here is a customer of mine that does these type of systems in Alaska:

A more exciting system is remotely deployed research platform on the north 
slope of Alaska. There is a detailed technical description of the system at:
Live data can be seen at:

-Jim Jarvis KB0THN

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