Generator

Re: Generator

I see some potentially dangerous confusion in your post. It could be me that's confused but ...

The generator does not attach to anything labeled (+) and (-) on the VFX3648. It connects to AC IN.
The frequency of the generator's output should be 60 Hz, not MHz which is MegaHertz and indicates millions of cycles per second.
The input Voltage should be 120 VAC, at 60 Hz.

Otherwise (and this is just my opinion) I think you're a little bit shy on panels for 700 Amp/hrs worth of batteries (I'd put it closer to 4000 Watts - perhaps 5000. Your charge rate is less than 4% as it is, if your total panel is 1488 as it seems). The MX60 will not handle the necessary Amps for a 10% charge rate (AGM's do not need as high a rate as FLA's, but there is no allowance here for loads drawing while batteries are being charged).

Re: Generator

Outback's install manual is available on-line:
http://www.outbackpower.com/pdf/manuals/fx_vfx_installation.pdf

Page 6 shows the AC connector board. Yes, it's under a plastic cover and you'll have to take a "knockout" out to run the wires in. This is the same place as the AC OUT is, so you must have done this before.

The important question is: do you have an Outback MATE programming unit? It is necessary to adjust the settings of the VFX for AC IN limits, charging specs, and so forth. Ideally it is connected via the Outback Hub (optional at extra cost ) and can communicate with both the inverter and the charge controller so that the settings are the same on each. It also allows one Remote Temperature Sensor (around $30 and worth it) to feed battery temp info to both units.

One thing you don't need is an external transfer switch. When the VFX senses Voltage at the AC IN it will automatically switch all loads to the generator and start charging the batteries.

Re: Generator

For that you need a whole 'nother manual!
Programming the FX series: http://www.outbackpower.com/pdf/manuals/fx_vfx.pdf

Key points:
Make sure that the Absorb, Float, and Equalize Voltages are the same for both the charge controller and the inverter. Also the Absorb time or current cut-out settings.

The AC In upper and lower limits are probably fine right from the factory. The AC charge is odd; it's in AC Amps. The default is 18 I think, which translates to roughly 45 Amps DC charging. With your bank that too will probably work, but you might want to put it up or down depending on your battery manufacturer's recommended charge rate. There should be no trouble with a 6kW generator - usually people run very small generators and have to reduce the rate so that the generator isn't over-whelmed.

Beyond that I can't be more specific, as this is where you have to fine-tune the settings to what works best for your particular application. Just watch the batteries very carefully when you first charge them from the inverter to make sure the Voltage levels are set right and the current isn't too high or low. A battery monitor is a good idea, especially with AGM's as you can't watch the electrolyte for bubbling nor check the Specific Gravity.