Tuesday, September 27, 2011

Fall/Winter 2011 Project: More Power System Automation

We are still looking for ways to save energy and money on running the house, primarily during the winter. We are looking at a design that will potentially expand the same battery bank to last for 3 days instead of 2 days. Many of the parts have already been purchased. The one piece I could not find in Fairbanks is a torque wrench that can reasonably show me a torque of 3 1/2 newton meters. The standard torque wrenches from a auto supply store are factors much higher than that.

Why 3 1/2 newton meters (approximately 2+ foot pounds)? That is what is suggested by the inverter manufacturer when tightening the lug nuts for the connection. Higher pressure and you risk breaking the lugs (and voiding the warranty).

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