| http://www.w3.org/ns/prov#value | - The last 3 paragraphs describe the scenario (yours) that can happen when external power is being drawn while the charger is in operation. http://www.ibexmfg.com/appnotes/app06.htm2) Some small consumer inverters/UPS (with self contained batteries) are designed such that the battery as it runs the inverter, the battery is referenced up to some intermediate voltage e.g. one terminal of the 12v batte
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