I would like to learn more about large-scale UPS systems, particularly the battery strings used in traditional RBOC/Telco applications. These are the sort of beasts that use huge strings of 6V 220aH deep cycle batteries, or even large numbers of 2V 400aH batteries on very strong earthquake-resistant shelving wired up to create a 48V mega-battery. Can anyone point me to the most definitive reference materials on the subject?
Diesel generator question: What is the typical fuel consumption rate of a 5kW, 10kW or 20kW unit at various load factors? How much does this vary (in litres per hour, or per day) between the same sizes of unit from different manufacturers? [more inside]