David Marshall wrote: > Mark and the list... > I've been looking at this whole second battery isolator / relay thing. I've seen some systems that want the tach or W > terminal signal to trigger the relay or a manually operated relay. What is > wrong with a 'simple' $9.95 relay wired like this: > > 30 Alternator or 1st Battery Positive pole > 85 0.3 BAR oil pressure switch > 86 looped back to the 30 terminal > 87 Positive terminal of the 2nd battery > David, The Sure Power Separator uses the voltage of the main battery to trigger the relay. Once the main battery reaches 13.2-13.5 volts the relay connects the aux battery to the charging current. Another function is to disconnect the main battery from the current draw when it (main battery) drops below 12.4-12.9 volts. Optionally, if the main battery voltage is lower than the aux battery, both batteries can be used to start the van. You pay more, but you get more. My 2&162; John Meeks Vanagon Rescue Squad http://www.vanagonauts.com/catid=74 91 MultiVan |
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