TL4000 high pitched whining

kevineaton · May 25, 2012

FB. said:
Thermometer stablised around 50'C in early-summer, late-afternoon sun, so 70'C, perhaps even 80'C seems quite possible in mid-summer, mid-day sun.

blimey!

kevineaton · May 25, 2012

done 24kw today - does that sound good?

FB. · May 25, 2012

kevineaton said:
done 24kw today - does that sound good?

I'm a bit over 23kWh today as of the last time I looked about 6pm. Being SE-facing (therefore the sun is behind my panels and I don't generate much in the afternoons), I'll probably only get up to about 24kWh by dusk.

System is 3.75kWp with 3.6 inverter as mentioned earlier. Been quite hazy sunshine, although no clouds at all today.

kevineaton · May 25, 2012

got 25.4kw at 1840

4kw system with eversolar invertor. perfect south facing and no obstructions.

infinity · May 25, 2012

i got 20 KWh today, SE facing with 50 deg pitch! only 3.5KWp system, ETsolar with TL4000 really cant fault the ET and eversolar combinations!

Vegelen · May 25, 2012

I generated 21KW, South Facing, 30 Degree Pitch, With a 3KW Suntech System with SMA 3000TL.

GaryM · May 25, 2012

A new record of 28.67kWh here

scottliv · May 25, 2012

26.4kwh today. Peak only 3.2kw with 3.75kw Sanyo /sma 4000tl combo. South Coast, South facing and 23 degree pitch. The hot weather has definitely decreased production. Managed 28.7kwh in the cooler beginning of the month.

sedgy34 · May 26, 2012

whinmoor said:
Nope! There's a whole load of things it "could" be but they are all highly unlikely - cables, connections, isolators. It's much more likely imho to be the inverter itself or the location. Is it tightly fixed to a solid wall with plenty of ventilation? You're not using it to keep your coffee warm when you work at your desk, are you!?! By switching the inverters, you've ruled out the possibility of a foreign object dropping inside.

I'm taking a risk here of being shot down, but here's a snap of one we did a while back in a loft. Notice the space for ventilation all around it. View attachment 11962

How does yours compare? This photo was taken before commissioning hence no warning labels etc.

Our customer's system is performing very well and we've not had any reports of noise although it is some distance away from the main living area.

Best plan might be to ask your installer to swap it for another brand and come to some deal on the difference in price.

2 strings =1 dc isolator they are 4pole derr and the clips man overdone it tried to do it neat but looks a mess

SolarCity · May 28, 2012

sedgy34 said:
2 strings =1 dc isolator they are 4pole derr and the clips man overdone it tried to do it neat but looks a mess

I'd use a seperate DC isolator for each string. Not necessarily a requirement, but I think it's a good idea.

infinity · May 28, 2012

SolarCity said:
I'd use a seperate DC isolator for each string. Not necessarily a requirement, but I think it's a good idea.

Me too, especially as you should use 2 poles for +ve and 2 for -ve to reduce switching arcing

SolarCity · May 28, 2012

infinity said:
Me too, especially as you should use 2 poles for +ve and 2 for -ve to reduce switching arcing

Depending on the method of disconnection of the DC switch. 'True' DC switches should only require 1 pole.

whinmoor · May 28, 2012

We tend to use one DC isolator per string. Don't like penny-pinching. Glad others agree. This type of wall is soft and crumbly which the clips wouldn't easily grip into so that's why there's loads of them. Anyway, it's in a loft where the homeowners rarely go so the appearance isn't a huge issue.