...well yea of course you don't want to mask a problem. I didn't mean that. I have a shunt in series with the batteries and the load and I know the parasitic draw is very very low because the Trimetric meter shows me that in real time.
Or you can go low-tech and measure current with a multimeter. And of course, if you measure substantial current draw with the switch in "Store" then the fun begins as you try to determine what device or devices are still connected.
At any rate, a solar panel is nice insurance.
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