Need Expert Advice on Split Phase Wiring for Inverter

[MD2020]

I have a Grand Design, Reflection 297RSTA Travel Trailer. Stock trailer has 50 amp 240V shore power connection that splits into 2 legs of 50 amp 120V's per each leg.

I'm trying to install a 12V, 300 amp LiFePo4 battery bank with a 12V, 5000 watt inverter (240vac input, split output 240/120vac 60hz).

I'm trying to figure out how to do the split wiring configuration from the inverter to the two 50 amp 120V legs to the circuit panel.

1. Diagram A1 shows wiring diagram for Dual-Phase Wiring Mode. It show shore power AC Power in with ground tied in to ground AC Power out. What should I do with the neutral wire from shore power?

2. Is the AC Power out from diagram A1 the input to AC Power in on diagram A2?

3. If question 2. above is correct, what device is diagram A2 and A3?

Any expert advice is greatly appreciated. Thx.

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[PNW_Steve]

Wow!

A 5kw/12 volt inverter....... At full load you will only be pulling about 500 amps from your battery bank.

I think that you are going to need a MUCH larger battery bank.... ..

Perhaps you may want to review your loads and see if you really need a 5kw inverter?

[littleharbor]

Fire up that inverter and don't run any loads, you will have a dead battery in less than 24 hours just due to the power it consumes being on. What reason did you have for going with such a high power inverter? Which really should be 48 volts to be safe.

[MD2020]

Fire up that inverter and don't run any loads, you will have a dead battery in less than 24 hours just due to the power it consumes being on. What reason did you have for going with such a high power inverter? Which really should be 48 volts to be safe.

Yeah, I think I need to recalibrate. Please disregard this post. I need to do more homework. Thx.

[PNW_Steve]

There is a great sticky on here that talks about battery bank and inverter sizing.

That would be a good place to start.

Good luck.

[NCmountainsOffgrid]

as a fellow RV owner, a Thor Palazzo diesel pusher with a Magnum ME2012 30amp Inverter/Charger and 4) 6v 200ahr House batteries(series/parallel for 12v output), I think I know what you are trying to accomplish, if your coach did not come with it's own 'whole house' inverter.
Rather than trying to mimic the 50amp double-pole 240v incoming shore power, you really only want to provide an Inverter to handle your sub-panel/critical loads, when off-grid, such as the ME2012 or MS2012 pure sine Inverter/Charger. You also don't need to worry about 240v service from the Inverter, only a single in/single out 30amp circuit, which can easily handle a sub-panel of two to four 15amp breakers for circuits that feed your FRIDGE(if it's 120v residential), microwave, and all the outlets within the coach. You DON'T want to feed heavy draw items such as the Electric water heater, Air conditioners, etc., as they can't operate from a small RV size battery bank, no matter what 'type' of batteries you have. Mine are simple lead-acid flooded batteries, and provide a great off-grid capacity, especially with my 6000Onan onboard generator and Magnum AGS to automatically start the generator to recharge them. The generator is really what you'll need to have to run Electric water heating(if you're not using your propane), or Air conditioning, etc.

On my coach, the main Electric panel is a 240v panel, yet it's design is NOT to provide a 240v output, only two separate 'power bars' for sharing each side of the two incoming legs of power to various circuits. It also includes an 'integrated' sub-panel for a power bar that provides the breakers for the Inverter's output, which comes into the main panel thru the BOTTOM of a 30amp breaker, which is attached to that power bar(in reverse of normal). The integrated Magnum Charger gets it's 30amp feed from one of the regular breakers on the main panel, when you are on Shore power or Generator power.

If you are looking to 'add' an inverter to your coach, it takes a little more than just buying and 'wiring' an inverter - you have to also have either a Main panel designed with in integrated sub-panel, or add a sub-panel for the Inverter's output - trying to wire the whole Main panel is not the goal.