Installing inverter

[UsedtobeGinger]

Hi, seems like a jolly place - are there any electrical experts on here?

I have a self-build Relay, installed ,most electrics about 3 years ago. I put in EHU (with a consumer unit including 2-pole RCD) with a single outlet socket, solar panels, lots of other stuff. I did not put in an inverter, as I didn't really need 230V off-grid for anything.

Anyhow, time moves on and I am working from the van on occasion, and would like to charge my laptop when off-grid, so am looking to install a low power inverter to supply the aforementioned AC outlet socket. As far as I can tell, there are a couple of ways I could do this safely - with the main things being to a) keep the EHU and Inverter AC supplies isolated (I am proposing to use a manual switch) and b) avoid the possibility of my leisure battery charger from being supplied by the Inverter output.

Re the two options in the diagrams attached, does anyone:

1) have any comments on safety issues? - I am not totally sure about avoiding earthing loops and whether / where neutral-earth bonding might be necessary
2) think there would be any other advantages to either option?

Thanks in advance for any constructive comments - including if you point out any howling errors in my diagrams!!

 

[UsedtobeGinger]

Soz, ignore this - see next post with the correct diagrams!

 

[Squiffy]

If you only want the inverter to charge your laptop, then cut out all the hassle and just use a cigar 12volt type socket with a small plug in type 300w inverter ( Pure sinewave, but I've never found it necessary) because that's all you need for any laptop/phone or tablet. That's what I've used (Modified inverter) for over ten years and never had a problem. Phil

 

[UsedtobeGinger]

Thanks Phil. I am quite nervous about a modified sine wave inverter used for a laptop - and a complication is that I consult for a firm who give me one of their laptops to use, so its not just straightforwardly my problem if it goes kaput because of the supply. I looked for a low power plug-in inverter, but none seem to be true sine wave.

 

[Squiffy]

Just as quick search and found this but there are many more.

https://share.google/N1SFGgvyNXsPwNuoW

Phil.