Balcony solar PV

[Joeboy]

Used the one remaining 8x2 from the boottoom build which I'd previously run through the saw to 2" timbers for first carrying rails on front shed PV build.

Great to be back at it on this final (?) Build.






Looks like we can squeeze all four panels in on roofspaces without going to fence mount.

[richbee]

While playing with the settings on my Sunsynk system, I notice that the maximum allowed setting for export in the app has increased from 3900W to 7500W.
It is a 3.68kW inverter compatible with G98.
As I now also have my Hoymiles system, I have seen the App export reading at 3940W occasionally when the sun is shining, before the voltage reaches 253 & trips the Hoymiles out - that is with the Sunsynk curtailing its output to leave the max export at 3900.

Is there any danger in increasing the export limit?

Obviously it is above the G98 limit, but does this cause problems, firstly safety-wise, secondly from DNO complaining about too much export?

I guess in a perfect scenario, the Hoymiles could generate 1300W, plus the Sunsynk at 3800W, minus the house running at 300-400W if we are out, so there is a potential of export at just over 4500W ish

[Joeboy]

While playing with the settings on my Sunsynk system, I notice that the maximum allowed setting for export in the app has increased from 3900W to 7500W.
It is a 3.68kW inverter compatible with G98.
As I now also have my Hoymiles system, I have seen the App export reading at 3940W occasionally when the sun is shining, before the voltage reaches 253 & trips the Hoymiles out - that is with the Sunsynk curtailing its output to leave the max export at 3900.

Is there any danger in increasing the export limit?

Obviously it is above the G98 limit, but does this cause problems, firstly safety-wise, secondly from DNO complaining about too much export?

I guess in a perfect scenario, the Hoymiles could generate 1300W, plus the Sunsynk at 3800W, minus the house running at 300-400W if we are out, so there is a potential of export at just over 4500W ish

We regularly export 6kW with battery & PV generation combined. I wouldn't worry.

[Joeboy]

That's the easy half up. Not in a hurry as the Hoymiles hms 1000 2T is still in Germany.




New MC4's fitted too. 4 of Y branches ordered to run two pair in parallel into the 2T.

Cost to date for 1kW PV system.
4 of 245W panels £160
100 mtr roll 4mm DC cable £48
10 of mc4 sets £10
Hoymiles field connection £10
Hoymiles HMS 1000 2T £180
2 sets Y branch £12
Running total £420

[richbee]

While playing with the settings on my Sunsynk system, I notice that the maximum allowed setting for export in the app has increased from 3900W to 7500W.
It is a 3.68kW inverter compatible with G98.
As I now also have my Hoymiles system, I have seen the App export reading at 3940W occasionally when the sun is shining, before the voltage reaches 253 & trips the Hoymiles out - that is with the Sunsynk curtailing its output to leave the max export at 3900.

Is there any danger in increasing the export limit?

Obviously it is above the G98 limit, but does this cause problems, firstly safety-wise, secondly from DNO complaining about too much export?

I guess in a perfect scenario, the Hoymiles could generate 1300W, plus the Sunsynk at 3800W, minus the house running at 300-400W if we are out, so there is a potential of export at just over 4500W ish

We regularly export 6kW with battery & PV generation combined. I wouldn't worry.

Thanks Joe

[Joeboy]

Panel No3 to be squeezed in on top of (soon to be multifunction) woodstore. This whole area gets more sun than I thought. Sulphur heart needs a trim and then we'll try a fit and look for shadows to be banished.



A strange thought occurred to me as I went in to make a 1/2 time cuppa. Even here in a hitherto unthought of and unutilised space, it's still the same local Star getting it done. As I said, strange.

[Joeboy]

No 3 of 4 up and tested OK with new MC4's fitted. No4 can wait until after the weekend.



Can you guess where No4 is going?

[Joeboy]

TBH, I didn't really enjoy hacking into.the Sulphur heart to clear edge space for the 3rd panel. I draw solace that going forward we'll green the panel site along with area around it and that will we hope beautify while giving spots for beasties to thrive in.



We were amazed to see a hawk hunting in the garden.this week.

The HMS 400 1T is in the UK. Hopefully arrives get a test on it against the IQ7 next week. Maybe do panel 1 & 2 installed today tests plus the 180 turnaround for accuracy. I've got two panels (new) elsewhere in garden banging out power on older micro inverter tech. Interested to see if I should leave as is on Enphase or move to Hoymiles here at Scottish home? I don't expect major Wattage increase on the newer Hoymiles but worth a look on the 400's way out to.Turkey.

[Moxi]

That's the easy half up. Not in a hurry as the Hoymiles hms 1000 2T is still in Germany.




New MC4's fitted too. 4 of Y branches ordered to run two pair in parallel into the 2T.

Cost to date for 1kW PV system.
4 of 245W panels £160
100 mtr roll 4mm DC cable £48
10 of mc4 sets £10
Hoymiles field connection £10
Hoymiles HMS 1000 2T £180
2 sets Y branch £12
Running total £420

Its pretty impressive when you consider that around 18 years ago, IIRC, on the other place I posted about getting my new 1.2kWp FIT's system installed at a really good price then of around £5,500 pounds which was around £4.54Wp how times have changed ! and for the better.

Moxi

[Joeboy]

That's the easy half up. Not in a hurry as the Hoymiles hms 1000 2T is still in Germany.




New MC4's fitted too. 4 of Y branches ordered to run two pair in parallel into the 2T.

Cost to date for 1kW PV system.
4 of 245W panels £160
100 mtr roll 4mm DC cable £48
10 of mc4 sets £10
Hoymiles field connection £10
Hoymiles HMS 1000 2T £180
2 sets Y branch £12
Running total £420

Its pretty impressive when you consider that around 18 years ago, IIRC, on the other place I posted about getting my new 1.2kWp FIT's system installed at a really good price then of around £5,500 pounds which was around £4.54Wp how times have changed ! and for the better.

Moxi

I didn't know the prices were that high back then! One more potential cost hurdle to cross. Both units are in UK now. Different messages for each though. Hoping to have the HMS 1000 2T outputting middle of next week.

Was thinking about you yesterday Moxi when putting the panels up. No extra engineering needed or fitted, hopefully OK when the 70mph winds arrive on site.






The new drum of DC cable added a fair bit to the cost. If someone had reasonable spares from previous jobs and the micros slipped past customs this could easy be a £350 job cost for a 1kW system (35p per W). That it will generate about 8kWh per day on its best days which can be chucked gridward shows the inherent benefit of the Balcony micros and the old PV.

Cost to date for 1kW PV system.
4 of 245W panels £160
100 mtr roll 4mm DC cable £48
10 of mc4 sets £10
Hoymiles field connection £10
Hoymiles HMS 1000 2T £180
2 sets Y branch £12
Running total £420