Andrew Smith 323 said:

Maximum power drawn for the year is 15.8kW during winter with heating on, batteries charging and EV charging.

Was all of that through the 50 A circuit?

Regardless, if it's "overloaded" surely the design should conform to BS 7671, and hence arranged or protected so that overload is not likely?

Chris Pearson said:

How much s it worth to fight? i.e. what is the possible benefit, and what has been lost. Balance the tw

Agreed ... the sad thing is that it might cost more to get legal and technical experts involved, than it costs to repair the installation (and if appropriate correct any defects).

If the damage is small enough to come under the small claims process, then you shouldn't need legal experts and won't get reimbursed for them.  What you would need is an independent export report.   Of course, you'd add the cost of that to your claim.

Import meter on 80A main fuse - blue wire

Export meter on 50A MCB - brown wire

Andrew Smith 323 said:

Import meter on 80A main fuse - blue wire

Export meter on 50A MCB - brown wire

That alone doesn't tell us where the current was flowing at any given points in time unfortunately.

However, a line conductor on one meter and neutral on the other does (without seeing the installation) make it appear that overload may have occurred (but without seeing further evidence, it's not conclusive).

As others have said, there are also a number of things that could cause this issue other than "overload" also - faulty equipment, or terminal not tightened to manufacturer's recommended torque (too tight or not tight enough), as well as other thermal considerations ... without seeing more evidence, it's not possible to do anything other than speculate.

Simon Barker said:

If the damage is small enough to come under the small claims process, then you shouldn't need legal experts and won't get reimbursed for them.  What you would need is an independent export report.   Of course, you'd add the cost of that to your claim.

Agreed, although if not involving legal professionals it would be up to the Claimant to consider the risks of not being successful.

The graph at the top shows total current drawn.

The garage is on a 50A breaker and has normal garage equipment plus the solar batteries and invertor

They did not attend when my house was smoking from the Consumer Unit so I had to call someone out and it cost me - just trying to get the money back

I notice the data sheet describes "Nominal Input Current 0.5-10(100)A" - what are the brackets for? is the 100A conditional in some way? Is just 10A a limit in some way? (I've just got in mind the old black cut-outs that was labelled 100A but that was only a "peak" (short term) value and they were only good to about 60A continuous.

  - Andy.

AJJewsbury said:

is the 100A conditional in some way?

Or does it need a current transformer?

Scratch that, it's suitable for 100 A direct fed according to the manufacturer: https://www.eastroneurope.com/products/view/sdm230dr

AJJewsbury said:

Is just 10A a limit in some way?

Possibly? But if so, why the 50 A breaker?

Feeds the garage supply where the solar invertor and batteries are installed - the PV DC cabling goes into there also