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I'm glad to report it works. i.e. two totally separate powered systems (with no shared earth/ ac neutral/dc- connections) are communicating over a LAN ethernet connection without any black smoke arising. Phew!

Ok seems one battery bank and one inverter keeps things simpler - I was just not sure that was a truely optimized solution (when cost and future expansion are included in the picture). Thanks for all the useful input.

I'm doing what I can to reduce electrical load (LPG kettle, hob and oven for instance) and the house is being well insulated, I'm trying to reduce the 24*7 power as far as possible (the non-electrical sewage treatment plant being a jolly expensive item I had not considered when starting this...

This is the rough concept. The capacity of each of the 3 systems would be different so I can fine tune the battery bank capacities as I live in the property.  Larger for those house circuits needed to get through the night. Generator sitting in barn waiting to be added into system (and the...

Apologies I did try to attach a rough circuit diagram but as a new user I could not.  I now can.  For this temporary solution only one of the inverters has an earth connection, so no option to 'common up' (if I understand the term correctly).  I hope to try it today

Following on from: As I'm building offgrid I've gone heavy on the solar PV (30 Solarworld 285W installed on two roofs). As per the above question I've 5 of the panels connected to 3 charge controller/batteries/inverters powering various temporary circuits during the build. I'm wondering if...

My  That was the info I wanted, thanks

Thank you! That was blindingly quick!

Hi all, my first question: Building an offgrid house and am part way through the process. As a temporary solution I have a number of solar PV panels powering some little charge controllers, batteries and inverters. My security camera system is powered by one inverter/battery/CC/PV system and my...

Hi  Building a new house and found Buildhub org a great resource. It was suggested on there electrical/solarPV questions might be better asked over here - so here I am!   I'm not a trained electrician, just a DIY'er with some odd ideas and an electrician doing most of the work Lincolnshire...