Need Inverter Wiring Help !

2oldman wrote:
Keep in mind that your scheme is a 'whole house' install, meaning you don't want your water heater on, or your converter, or your a/c when on inverter power. Just be mindful of that when inverting. I've done it for years.

I'm not a fan of using subpanels. Lotta work.

I was trying to keep it simple which is why I wanted to do do it this way. The sub-panel may be beyond my DIY skills.

I was aware of the AC and water heater issue and they would be easy to leave off.

I had not thought about the converter. Hmm..

Yes that placement in the circuit will work. It will supply power to everything so be careful with what is on such as converter, 120v fridge, 120v water heat etc. As an alternative get a straight inverter and separate transfer switches for just the circuits you want powered up.

+1 need to verify the INPUT wattage of the microwave or go 2000 watts.

Generally you should have three or more batteries driving this inverter... what do you have?

Error on the large side for 12v connection.

BFL13 wrote:
Next, question whether you really want/need an inverter/charger which is expensive, when all you need is the inverter.

The OP's link shows only an inverter.

First check the input watts on its label on the back needed to run the microwave. EG a "1000w" MW might want 1500w input. The PSW 1500w inverter would be maxed out. Might get away with a "900w" MW.

With a B you will have limited room or weight for a the usual four batteries needed to run microwave type high amp drawing loads. However, AGM batteries are much better at this, so if you can only carry two batteries, have AGMs for that job.

Next, question whether you really want/need an inverter/charger which is expensive, when all you need is the inverter. The B will already have a converter.

You could use the money saved there to buy the AGMs.

There are several wiring options for inverters that have their own receptacles but limited options for hard wired ones.

Oilman wrote:
Can I take the shore-power wires that go into the Motorhome transfer switch and attach them to the inverter transfer switch and in turn attach the inverter to the MH transfer switch ?? Does this sound right??

Yes, that should be fine.

Oilman wrote:
I would like the unit to power all the outlets although it will only really be used for a hair dryer and microwave.

Keep in mind that your scheme is a 'whole house' install, meaning you don't want your water heater on, or your converter, or your a/c when on inverter power. Just be mindful of that when inverting. I've done it for years.

I'm not a fan of using subpanels. Lotta work.

In a word, you can, but not the best way. It would require a couple of steps (turning off multiple breakers)each time you were not on shore power or generator.

You only want those circuits that you want to be able to run on the inverter on the "output" side of the inverter. Certainly NOT things like roof A/C, 120 VAC water heater element, converter, etc. Doing it like you suggest would REQUIRE (so batteries are not discharged rapidly and/or appliances or inverter overloaded) that you turn off all the individual breakers to all those devices you do not want powered by the inverter every time the generator is not running/shore power connected.

Best way is to wire inverter output to a sub-panel with only those things you want to be powered by the inverter when not on shore power.

So, can it be done-- Yes, but there ARE better ways.