Quote:
Originally Posted by hd0187dh
No. If you have a 50 system your inverter is 220 v to 12v. On a 30 amp single pole you are only supplying power to one leg of the inverter .
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Wrong.
50 amp service provides 240/120 volts (two hots). 30 amp service provides only 120 volts (just one hot).
Although 240 is available with 50 amp service, almost no rigs have 240 devices. (Some ultra high-end might, but that is the exception. Doesn't matter though, it doesn't change this conversation.) Most 50 amp RV panels aren't even configured to allow for a 240 volt breaker (double) and get 240 volts. The panel has one leg on the left and one leg on the right, with the main breaker in the middle. To get 240 volts with a breaker, the panel has to have alternating left/right legs, so no two stabs next to each other are on the same leg.
On a 50 amp service, the voltage across the left and right side of the panel is 240 volts, however only 120 volt devices are used and only connect to a single breaker on either the left or right side. When a 50/30 dog bone adapter is used, the single hot leg from the pedestal is connected to both the left and right legs in the panel. This means the voltage across the left and right side of the panel is 0 volts because they are the same wire. Voltage across either the left or right side and neutral is of course 120 volts. This is OK because only 120 volt devices are used. You are still limited to 30 amps in this configuration.
A 50 amp service provides 100 amps at 120 volts. (50 amps on each of the two legs.)
The converter is 120 volt. If 30 amp service is not energizing the converter, it is because the 50/30 dogbone isn't powering both legs like it is supposed to. All 50/30 dog bones should send 120 to both legs/sides of the power panel. If the dog bone isn't doing that, one complete half of your panel will be dark. Every converter I have seen is on a 20 amp breaker, which is less than the 30 amp service... which means the 30 amp service is more than enough.
Unless your batteries are very low, you will probably not draw more than 3 or 4 amps from the converter. (Converters can draw a lot of current while charging low batteries, however maint mode draws significantly less.)