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--- electrical:inverter [2018/06/16 23:41]
frater_secessus [overvoltage and undervoltage]
+++ electrical:inverter [2019/03/13 15:35]
frater_secessus [sharing power]
@@ Line 104: / Line 104: @@
 Because higher voltage power has less losses over long wires, it may be most efficient to share power between RVs as 120v.  The donor vehicle would invert to 120v, plug in an extension cord to their inverter and run it to the recipient.  The recipient could plug it cord into their [[electrical:shore_power|shore power]] inlet or use it as 120v.
+====== differences from shore power 12vac ======
+Inverters make 120vac in different way than [[electrical:shore_power|shore power]] does.  [[http://thesurvivalpodcast.com/forum/index.php?action=profile;u=13518|Alan Georges]] explains:
+> ... inverter outputs are usually two 60 VAC lines driven 180 degrees out of phase, so that there is a net 120 VAC potential across them.((http://thesurvivalpodcast.com/forum/index.php?topic=63891.msg758502#msg758502))
+>That's all fine, as long as what's plugged in is electrically "floating," that is, not connected to any external ground.
+> The situation gets more complicated when there's a 3-prong 120 VAC plug.  The third prong is a safety ground which is assumed to be tied to a ground rod.
+> You can see that the neutral and ground wires [in shore power] are tied together at the panel.  That works, because the hot is 120 VAC.  You can also see how that is very different than two "half-hot" 60 VAC lines, and how that kind of tie-in would short out one leg of an inverter. \
+> In fact, the situation with an inverter is very similar to the 240 VAC circuit shown in that drawing, which has 2 120 VAC lines driven 180 degrees out of phase, i.e., "push-pull."((http://thesurvivalpodcast.com/forum/index.php?topic=63891.msg758502#msg758502))

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