Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 36 replies
  • Subscribers 34 subscribers
  • Views 5608 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Where can a PV array be connected?

Chris Pearson

I suspect that a PV array would normally be connected between the meter and the first DB, but can it be connected more peripherally please?

The most suitable area of roof is at the opposite end of the premises from the electrical origin. However, there is a small DB with spare ways adjacent to the loft space. It supplies one lighting and one socket circuit and is seldom significantly loaded. The distribution circuit from the main DB is 16 mm² singles (with the live conductors being sheathed). As far as I can see, it travels through under-floor voids and is boxed in with other services as it ascends in a bathroom so RCD protection is not required. If the inverter can be situated in the loft space then only a short length of AC cable would be required.

This is what I have in mind.

Parents
  • 0

    Ideally you need to avoid having anything else on that submain so you can isolate the inverter. Can the light and socket be transferred to another circuit ? Electrically it will work of course, but because the direction of voltage drop is reversed it all gets a bit complex and is not recommended.
    M.

  • 0 in reply to mapj1

    Mike, thank you. I hadn't thought about voltage drop, but now I have a mental picture of electrons meeting in the middle and having a sort of push-of-war.

    Concerning isolation, I realise that there would have to be warning notices on the various DBs about two sources of supply.

Reply
  • 0 in reply to mapj1

    Mike, thank you. I hadn't thought about voltage drop, but now I have a mental picture of electrons meeting in the middle and having a sort of push-of-war.

    Concerning isolation, I realise that there would have to be warning notices on the various DBs about two sources of supply.

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines