Tuesday, September 30th, 2014 - 8:50 am 
(Arizona time)

meltdownPhoto at left shows the situation after a battery discharge
test at 300 amps was terminated on a 1530 AH IBE battery string when one post melted.

During the discharge test all cell voltages are logged. The sum of the cell voltages was 2.73
volts lower than the 48-volt string voltage. This is an average of 118 mv per inter-cell
connection, 5-10 mv is the normal range in a properly connected battery bank.

Lesson learned: Bolts are not for current carrying.
Bolts are to hold lugs, etc. in tight contact with electrical terminals.

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View with bolt removed. Shows where
battery lead terminal was melted.

Detail of the low-cost battery connections.

AzSC Blog

There’s a lot of work (to do)...

Earlier this summer the Environmental Protection Agency (EPA) released its proposed rules for Section 111(d) of the Clean Air Act. This is the rule that deals with reducing carbon emissions from existing power plants by 2030. The proposed rule was shaped by public input and builds upon existing priorities, activities, and efforts in states throughout the country.

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