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Discuss Compatability issues with SMA HF and Sanyo panels in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net
T
TMGL
Re: Help with fault?
Bizarre timing but I got a call today...sounds like exactly the same problem. Customer saying at around 1.30 p.m. Output drops from 2.9 kw to 301w...cloudless sky. I was flummoxed! Sma sb 4000tl...fitting team and sparky have done over 200 installs so confident that strings are correct.
Bizarre timing but I got a call today...sounds like exactly the same problem. Customer saying at around 1.30 p.m. Output drops from 2.9 kw to 301w...cloudless sky. I was flummoxed! Sma sb 4000tl...fitting team and sparky have done over 200 installs so confident that strings are correct.
T
TMGL
Re: Help with fault?
Yup, 17 235's n series from memory. Up in the Scottish Borders...best day for a while today. He did 12 units before 1 p.m. And then 1 unit between 1p.m. And dusk. I'd have preferred it if the system had gone off altogether as it would have been easier to identify the problem! I'm not an electrician but have a fair bit of pv experience and it's a new one on me.
Yup, 17 235's n series from memory. Up in the Scottish Borders...best day for a while today. He did 12 units before 1 p.m. And then 1 unit between 1p.m. And dusk. I'd have preferred it if the system had gone off altogether as it would have been easier to identify the problem! I'm not an electrician but have a fair bit of pv experience and it's a new one on me.
OP
- Reaction score
- 127
Re: Help with fault?
The plot thickens... Try the isolator on off business and see what happens. I was told today that most panel faults are characterised by stable voltage and a serious drop off in current... Not looking forward to testing individual panels for an intermittant fault, will need 12 clamp meters ;-) and lots of sun...
The plot thickens... Try the isolator on off business and see what happens. I was told today that most panel faults are characterised by stable voltage and a serious drop off in current... Not looking forward to testing individual panels for an intermittant fault, will need 12 clamp meters ;-) and lots of sun...
T
TMGL
Re: Help with fault?
It will be an integrated dc isolator on the 4000tl so might just reset inverter tomorrow to see if the experience is as yours. Supplied by segen or AS solar if that's also a common link?
It will be an integrated dc isolator on the 4000tl so might just reset inverter tomorrow to see if the experience is as yours. Supplied by segen or AS solar if that's also a common link?
OP
- Reaction score
- 127
Re: Help with fault?
Yesterdays figure, clearly showing the point of dropoff, now not even coming back up untill reset on the DC isolator. Might have to try swapping the Inverter out for a fronius... Can't really think of anything that will definitively give me an answer. Nobody else other than TMGL heard of this happening/had this happen? PM me please if you can't admit it on the forum, i won't tell... If you know of anyone that might be able to help please a pass their details on.
Yesterdays figure, clearly showing the point of dropoff, now not even coming back up untill reset on the DC isolator. Might have to try swapping the Inverter out for a fronius... Can't really think of anything that will definitively give me an answer. Nobody else other than TMGL heard of this happening/had this happen? PM me please if you can't admit it on the forum, i won't tell... If you know of anyone that might be able to help please a pass their details on.
OP
- Reaction score
- 127
Re: Help with fault?
Yes, new isolator, new tails and sunclix into the inverter. Same stuff happening, behaves completely normally after a 10 second switchoff... Wondering if it could be a firmware issue but there must be tens of thousands of Sanyo/SMA installs out there now...
Yes, new isolator, new tails and sunclix into the inverter. Same stuff happening, behaves completely normally after a 10 second switchoff... Wondering if it could be a firmware issue but there must be tens of thousands of Sanyo/SMA installs out there now...
- Reaction score
- 723
Re: Help with fault?
Sounds very much like a loose connection somewhere to me - possibly on a panel itself. Judging by the data you have shown, the problem appears to be getting worse - I would say this is consistent with a loose connection that is getting very hot. However, the fact that switching on and off at the DC isolator lets the system reset contradicts this conclusion.
Have you checked the resistance of the circuit during peak times?
Sounds very much like a loose connection somewhere to me - possibly on a panel itself. Judging by the data you have shown, the problem appears to be getting worse - I would say this is consistent with a loose connection that is getting very hot. However, the fact that switching on and off at the DC isolator lets the system reset contradicts this conclusion.
Have you checked the resistance of the circuit during peak times?
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