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Author Topic: What is likely to happen when an inverter eventually fails  (Read 943 times)
JohnP2014
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« on: July 18, 2018, 07:49:46 PM »


I don't know if anyone is still reading this, but the thread almost perfectly covers my situation.
Salesman, claiming to be working for my original installer, called around and gave me the "wow still functioning OK since 2012" and "You are overdue for an inverter failure" treatment.

I responded with the "If it ain't broke, don't fix it response".

To cut a long story short his line was that replacing the inverter now would be cheap BUT when it failed in this hottest of summers it would most likely take most of the rest of the system with it. He could not quite bring himself to say "and most likely burn down the house".

So simple question:

What are the usual results when an inverter eventually fails?

[I would guess there would be a clonking noise in the meter cupboard as one of the RCCBs noticed something was getting out of balance.]

John.

PS Hi Martin, its good to know you dual system has been upgraded to Solar Edge and is still generating; I remember you planning it on MSE in the "old days".
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JohnP2014
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« Reply #1 on: July 18, 2018, 07:59:51 PM »

This thread logically follows on from this historical one:

https://www.navitron.org.uk/forum/index.php/topic,29026.0.html
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GeoffM
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« Reply #2 on: July 18, 2018, 08:21:33 PM »

I've had two fail and they just stopped working - no generation, no lights, wouldn't reboot etc.

I wouldn't have known until FIT time had I not been the type to monitor my output regularly.
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snyggapa
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« Reply #3 on: July 18, 2018, 09:25:35 PM »

mine sat there rather boringly saying "AC relay fail" or something, when it failed it's own self test which I think it does every time it connects to the grid. no tripping, no smoke or drama, just no output. The inverter knew it was dead so it just shut down
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todthedog
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« Reply #4 on: July 19, 2018, 05:57:08 AM »

I've had two go.
No fuss no lights just dead with a resentful air!
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linesrg
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« Reply #5 on: July 19, 2018, 08:10:37 AM »

Good Morning All,

Fortunately it's been a while but they have simply failed. This refers to SMA and Fronius ones.

Regards

Richard
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16 BP380 on a Lorentz ETATRACK1000/SB1700, 16 Chinese 80W/SB1700, 16 BP380/SMA SB1700. CTC GSi12 + Ecosol + Flowbox 8010e/Gledhill ASL0085 EHS/3 Navitron 4720AL solar ET panels and Immersun T1060/ T1070/ T1090. 7 Tianwei 235W/ Aurora PVI 3.6kW/ Growatt SP2000 c/w 5kWhr battery and a Renault Zoe
JohnP2014
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« Reply #6 on: July 22, 2018, 04:48:11 PM »

Thanks everyone for your helpful replies.

I have a "Power-One" now ABB [Californian company absorbed into a Swiss/Swedish one] Aurora double string inverter dating back to Valentine's day 2012. Mine is 3.6 kWp

It has a nice big passive aluminium heat fin and was probably over-engineered in a rapidly falling price market.



The videos suggest it is capable of diagnosing its own problems and closing down safely.
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Mostie
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« Reply #7 on: July 22, 2018, 05:05:04 PM »

Just had a Power one PVI3.0    1 of 3 replaced last week, it had run from Feb 2011, so I expect the other 2 will follow soon....
it had the usual relay failure error code
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2x Solis PV = 1.875 kW, Mitsubishi inverter heat pump. Yorkshire Boiler Stove.
JohnS
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« Reply #8 on: July 22, 2018, 11:31:34 PM »

I have an SMA2500.  One of the old one with a good old iron transformer.  Still going fine after 8+years.

I have freebie power meter showing its instantaneous and daily output which is enough monitoring for me.  Not obsessional.  Helped me to quickly identify an MCB trip - but only one in 8 years.

John
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2.1kWp solar PV
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