Is moving a solar inverter about 2ft to the right a DIY job?
Is moving a solar inverter about 2ft to the right a DIY job?
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steveatesh

Original Poster:

5,292 posts

186 months

Friday 4th July 2025
quotequote all
I have a Solax inverter currently installed in the garage but due to the need to fit a new garage door it needs to be move around 2ft to the right (the sectional garage door rails extend much further back than the original rails do).

Looking at the work it appears to be fairly easy - the black cables leading u to the inverter will simply loop the other way to the other side of the black isolators, and I can install a wood base onto the garage wall to take the new position of the inverter.

However, the white cable wil need replacing and I have no idea what it is in terms of amps, cores etc .

Can these be bought ready made up so I can simply buy one, switch everything off, remove the white cable move the inverter, and plug in the new cable and switch on, or is it definitely a qualified electrician job because a new cable has to be made up?

I am competent with house stuff like spurs and that type of thing so not a complete novice, but I am new to solar stuff.

Thanks in advance.


119

16,473 posts

58 months

Friday 4th July 2025
quotequote all
That’s the main supply cable so not sure I’d be messing about with it.

Call your sparky to do it. It won’t take long so shouldn’t cost much id have thought !

shirt

24,958 posts

223 months

OutInTheShed

12,780 posts

48 months

Friday 4th July 2025
quotequote all
That does look like: isolate AC and DC.Disconnect white AC cable. Move inverter across. Replace white AC cable with longer one. Check everything, Switch on. Get beer.

But if you have to ask....

ashenfie

2,068 posts

68 months

Friday 4th July 2025
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Agree with last poster comments. Be very aware even when the DC isolator (black dials) are off there is still electricity in the system. What kind of test gear do you have?

JoshSm

2,966 posts

59 months

Friday 4th July 2025
quotequote all
steveatesh said:
However, the white cable wil need replacing and I have no idea what it is in terms of amps, cores etc
Usually the specification is printed or embossed on the outer sheath, takes the guesswork out of it.

It's going to be a 4mm² or 6mm² three core flex most likely.

Hoofy

79,198 posts

304 months

Friday 4th July 2025
quotequote all
Dunno about this size of inverter but they might need to have things like the panels disconnected first to avoid damaging the electronics. Best check in the manual.

ashenfie

2,068 posts

68 months

Friday 4th July 2025
quotequote all
Agree with last poster comments. Be very aware even when the DC isolator (black dials) are off there is still electricity in the system. What kind of test gear do you have?

steveatesh

Original Poster:

5,292 posts

186 months

Friday 4th July 2025
quotequote all
Cheers guys, I’ll leave it.

Only asked as up to now not a single electrician has responded to an enquiry and I’ve tried about a dozen.

I’ll keep on trying!

Hoofy

79,198 posts

304 months

Friday 4th July 2025
quotequote all
Can you speak to the people who installed the system? Or another solar installer? I know it's small fry compared to them being called out to install a full system but if they have spare capacity they might be happy for the extra work.

steveatesh

Original Poster:

5,292 posts

186 months

Friday 4th July 2025
quotequote all
Hoofy said:
Can you speak to the people who installed the system? Or another solar installer? I know it's small fry compared to them being called out to install a full system but if they have spare capacity they might be happy for the extra work.
Cheers, I did speak to them but apparently they are inundated with work and can’t even look at it until well into September. However, I might go back to them and ask if they can supply that white cables but longer to allow the move.

They actually suggested trying a local electrician but not much joy in that direction.

hidetheelephants

33,145 posts

215 months

Saturday 5th July 2025
quotequote all
It will be ordinary flex; read the script on the insulation, it will tell you the gauge of the cable and you can go to the nearest electrical wholesaler and buy a longer piece.

md_ph

398 posts

126 months

Saturday 5th July 2025
quotequote all
Look really closely on the cable, it should have some details imprinted into it, this will allow you to replace easily. It looks like 2.5mm flex from here.

You could move all of that easily without disconnecting the black cables from the inverter if you just open up the lid on the trucking and slide it to the right.

Flat6er

1,725 posts

232 months

Saturday 5th July 2025
quotequote all
Is replacing with different doors an option?

If I understood you correctly, the issue is the rollers come back to far.

We had electric rolling doors on our last place, and the mechanism fitted neatly within a foot of the door.

Edited by Flat6er on Saturday 5th July 08:12

Hoofy

79,198 posts

304 months

Saturday 5th July 2025
quotequote all
steveatesh said:
Hoofy said:
Can you speak to the people who installed the system? Or another solar installer? I know it's small fry compared to them being called out to install a full system but if they have spare capacity they might be happy for the extra work.
Cheers, I did speak to them but apparently they are inundated with work and can t even look at it until well into September. However, I might go back to them and ask if they can supply that white cables but longer to allow the move.

They actually suggested trying a local electrician but not much joy in that direction.
Could post on your local FB group. Might get the attention of an electrician directly or someone might tag them and it should appear in their notifications so they can respond.

steveatesh

Original Poster:

5,292 posts

186 months

Saturday 5th July 2025
quotequote all
Flat6er said:
Is replacing with different doors an option?

If I understood you correctly, the issue is the rollers come back to far.

We had electric rolling doors on our last place, and the mechanism fitted neatly within a foot of the door.

Edited by Flat6er on Saturday 5th July 08:12
Sadly not, rollers won’t fit due to a large RJB across the top of the garage, has to be the sectional style which comes back much fipurtyer than the one originally fitted.

steveatesh

Original Poster:

5,292 posts

186 months

Saturday 5th July 2025
quotequote all
Hoofy said:
Could post on your local FB group. Might get the attention of an electrician directly or someone might tag them and it should appear in their notifications so they can respond.
Cheers, I ve put something on a find a trade type thing this morning, I ll see how that goes .

Also asked the original installers if they can supply a suitable cable .

shirt

24,958 posts

223 months

Saturday 5th July 2025
quotequote all
RTFM

it states the cable size, tells you how to isolate and discharge, and shows how to wire the plug. it's a 10min job at best, which is why the spark doesn't want to come out.

eliot

11,987 posts

276 months

Saturday 5th July 2025
quotequote all
that’s an easy job, but as others say - if you need to ask then best left to someone with more experience

Gareth79

8,665 posts

268 months

Saturday 5th July 2025
quotequote all
md_ph said:
Look really closely on the cable, it should have some details imprinted into it, this will allow you to replace easily. It looks like 2.5mm flex from here.

You could move all of that easily without disconnecting the black cables from the inverter if you just open up the lid on the trucking and slide it to the right.
Yes it's best to avoid disconnecting the MC4 connectors if at all possible. One problem is that the inverter is probably hanging on a metal bracket, so the inverter will need propping up on a ladder or something while the bracket is moved over. I'd snip the cable ties first so that they can reorganise themselves.

It should then be easier to get an electrician to replace the supply cable if you just say "I need this replacing with a longer one", although as mentioned it is a pretty straightforward task, not much trickier than wiring a plug.