48V Off Grid Setup

mickeymichael

So, I am new to solar in general which will likely be obvious from the diagram I've included. I have been designing a 48V system to run (at the moment) just a pond pump and I have a few questions. Here are core components:

1. 3 X Hyperion 400w Bifacial Panels wired in series

2. Victron 150/35 MPPT Charge Controller

3. EG4 V2 LiFePO4 48V 100ah Battery

4. Victron Phoenix V.E. Direct 48/500 Pure Sine Wave Inverter

For anything not mentioned in the core components, please refer to the diagram which I am hoping is not too sloppy. I drew it in the way that made sense to my brain. Assume that the wire runs are as short as possible and wire gauges are more than sufficient. Here are the questions I currently have:

1. Since it is just a single string array currently, can the surge arrestor just go directly to the positive/negative/ground busbars?

2. The diagram for the Midnite Solar Ground Fault Protection Device was more confusing than helpful so if you have any advice about including a GFPD in my system, including other brands, I would appreciate it.

3. Is it considered "best practice" to bond the neutral to the chassis in my inverter to create a "true neutral" which is listed in the manual as optional depending on local regulations?

4. Should the inverter be wired directly to the battery or to the positive busbar?

5. The portable GFCI plug states that it is rated for 15 amps. Does that mean it will provide ground current protection as well as overcurrent protection up to 15 amps?

6. I am not looking for suggestions about getting rid of the AC pump and inverter and getting a DC pump. Please keep advice in the realm of the questions I have outlined. Thank you in advance.