Solar PV

Help Support Talk Electrician Forum:

Jc1996

Well-known member
Joined
Sep 16, 2021
Messages
69
Reaction score
2
Location
London
Hi guys, not something I know a lot about but my parents have recently had a system fitted. The inverter is fed by a 20amp type B breaker feeding a submain. Does this backfeed somehow back into the system?

My second question is it displays over 6.5kw and trips the breaker every 3 hours or so. I haven’t checked anything at the moment just wanted some advice of how these systems work.
 

Attachments

  • ABE9CD0D-C3C8-4EB1-A00C-260FBC1E153D.jpeg
    ABE9CD0D-C3C8-4EB1-A00C-260FBC1E153D.jpeg
    68.7 KB · Views: 23
  • A87A7A4A-344C-4E61-ACA4-B6C4B23B0437.jpeg
    A87A7A4A-344C-4E61-ACA4-B6C4B23B0437.jpeg
    98.4 KB · Views: 23

binky

eco warrior......™
Joined
May 7, 2008
Messages
11,660
Reaction score
519
Location
Sunny Plymouth
if that inverter is around 6kW - have a look at the label on the side, it wil be outputting more than 20A, MCBs will tolerate lower levels of overloading for periods of time, hence it doesnt trip immediately, and the ampage outputted will of course vary with the sunshine (or lack of).
 

Jc1996

Well-known member
Joined
Sep 16, 2021
Messages
69
Reaction score
2
Location
London
Yeah it’s around 26amps so could it be changed for a 32amp breaker obviously changing the cable as well not sure what 4mm can take?
 

Jc1996

Well-known member
Joined
Sep 16, 2021
Messages
69
Reaction score
2
Location
London
as I said I don’t know how the systems meant to work but it does display 6500watts and is connected to a 20amp breaker.
 

binky

eco warrior......™
Joined
May 7, 2008
Messages
11,660
Reaction score
519
Location
Sunny Plymouth
Just give them a polite bad review on SM about the way they don’t provide a decent after sales service😁
Or complain to MCS, believe you me, they jump on any company that is messing with the standards. They kicked Everest off the scheme for using classic 'double glazing' hard sell tactics years ago.
 

Gian

Well-known member
Joined
Feb 4, 2021
Messages
103
Reaction score
17
if that inverter is around 6kW - have a look at the label on the side, it wil be outputting more than 20A, MCBs will tolerate lower levels of overloading for periods of time, hence it doesnt trip immediately, and the ampage outputted will of course vary with the sunshine (or lack of).
I as well had a company fit a system for me and they had a fantastic write up and showing all there professional bodies they belonged too. And they did the same to me . I had to replace a 20amp for a 40amp as mine did more or less the same. I was a bit upset in the fact that I was paying for professionals to install a system. I got a lovely certificate from I think was NAPIT. I look at it and think that certificate ment nothing.
 

binky

eco warrior......™
Joined
May 7, 2008
Messages
11,660
Reaction score
519
Location
Sunny Plymouth
I as well had a company fit a system for me and they had a fantastic write up and showing all there professional bodies they belonged too. And they did the same to me . I had to replace a 20amp for a 40amp as mine did more or less the same. I was a bit upset in the fact that I was paying for professionals to install a system. I got a lovely certificate from I think was NAPIT. I look at it and think that certificate ment nothing.
Most of the companies still MCS registered are the bigger national outfits that employ subbies. As demand is so high, they are using lots of new subbies who don't fully understand PV.

When the FiT system was designed, the government did try to prevent that sort of thing, with codes of conduct, standards etc etc, but like anything where there's money to be made, the charlatans got around it. Lots of companies were formed and quickly dissolved again to avoid any longer term comeback on them. It all looks wonderful with so many logos on your company headed paper - think I had at least 6. The original intention was that PV would become regular work, the FiT scheme was designed to end over the course of about 10 years having encouraged people like myself to train and invest in this line of work. The scheme finished after 6 years having met some target. In my opinion MCS should have been dismantled at the same time, but as a private company quango, they have kept themselves in a job and are trying to get control of other tech like EV charging. The cost of MCS registration is around £3k, so lots of small companies like myself left the industry, which just left the big players in the market, the ones that BS a lot and use subbies. This is why I'm quite happy to encourage people to install their own systems. I do still install a system of two for friends, and do repairs - not many companies will take on a repair.
 

stuboy

Member
Joined
Jan 9, 2021
Messages
24
Reaction score
5
Most of the companies still MCS registered are the bigger national outfits that employ subbies. As demand is so high, they are using lots of new subbies who don't fully understand PV.

When the FiT system was designed, the government did try to prevent that sort of thing, with codes of conduct, standards etc etc, but like anything where there's money to be made, the charlatans got around it. Lots of companies were formed and quickly dissolved again to avoid any longer term comeback on them. It all looks wonderful with so many logos on your company headed paper - think I had at least 6. The original intention was that PV would become regular work, the FiT scheme was designed to end over the course of about 10 years having encouraged people like myself to train and invest in this line of work. The scheme finished after 6 years having met some target. In my opinion MCS should have been dismantled at the same time, but as a private company quango, they have kept themselves in a job and are trying to get control of other tech like EV charging. The cost of MCS registration is around £3k, so lots of small companies like myself left the industry, which just left the big players in the market, the ones that BS a lot and use subbies. This is why I'm quite happy to encourage people to install their own systems. I do still install a system of two for friends, and do repairs - not many companies will take on a repair.
Oh, never has a truer statement been made! Its actually scary what some people are left with as a completed MCS certified install!
 

Latest posts

Top