May 2024 generation

[Joeboy]

Solaredge 537kWh
Victron 467kWh
Enphase WS 47kWh
Enphase HT 8kWh
No1's Hoymiles 65kWh
Graig Fatha WT 346kwh

1,470kWh RE generation minus 65kWh No1's Hoymiles = 1,405kWh solo home gen.

332kWh electricity bought from grid for our place is 81.6% self generated RE in the monthly mix & Zero gas or liquid fuels.

No1's place on which we are still waiting for an appointment to change to a smart meter has landed a 40% score for self reliance in the energy game from his two panel Hoymiles system.

[Fintray]

My results for May were:

3.87 kWp, slope 50 degrees, due south, lat 57.15

Total generation: 437.4kWh

Daily average: 14.1kWh

Generation per kWp: 113kWh

Daily average per kWp: 3.6kWh

PVGIS: 401kWh

%PVGIS: 109%

Down 8.3% on my May average.

[resybaby]

Mays generation numbers

FIT system generated 497kwh
Sunsynk system Generated 192.1kwh

[AE-NMidlands]

407.5 kWh - if my inverter/app is to be believed.

[Yuff]

478 kWh

Down 22% on May 23

[AE-NMidlands]

407.5 kWh - if my inverter/app is to be believed.

p.s. and I realised that around the 20th I passed the 1 MWh milestone since installation in January! Inverter today telling me I have got to 1,115 kWhr, of which 591 has been exported.

[Joeboy]

407.5 kWh - if my inverter/app is to be believed.

Why would you not believe? They don't tend to fib. That is quite a lot of export, are you being paid for it?

[AE-NMidlands]

407.5 kWh - if my inverter/app is to be believed.

Why would you not believe? They don't tend to fib. That is quite a lot of export, are you being paid for it?

It "tells me" it does all sorts of spikes of import and uninstructed export and someone here pointed out that what really counts is the Octopus bill - which doesn't seem to bear out what the graph says, I'm pleased to say. My downloaded smart meter data don't quite agree with the Givenergy displays of last month's import or export either, but I'm happy to go with what Octopus pay me for!

In fact I am on Octopus Flux and have exported almost exactly 100 standard units and 200 peak this month. I was going to move to Intelligent Octopus when I didn't need to import at all but it's my first year and there have been a few "cockups on the control front" - so I am glad I have stayed with the cheaper flux import rate for a top-up when the exporting schedule has been over-optimistic.
I have imported about 30 units, half because of the need to recalibrate my battery - which imported slowly all day long including right through the evening peak! Maybe two thirds was flux top-up at 2 a.m.

[Joeboy]

407.5 kWh - if my inverter/app is to be believed.

Why would you not believe? They don't tend to fib. That is quite a lot of export, are you being paid for it?

It "tells me" it does all sorts of spikes of import and uninstructed export and someone here pointed out that what really counts is the Octopus bill - which doesn't seem to bear out what the graph says, I'm pleased to say. My downloaded smart meter data don't quite agree with the Givenergy displays of last month's import or export either, but I'm happy to go with what Octopus pay me for!

In fact I am on Octopus Flux and have exported almost exactly 100 standard units and 200 peak this month. I was going to move to Intelligent Octopus when I didn't need to import at all but it's my first year and there have been a few "cockups on the control front" - so I am glad I have stayed with the cheaper flux import rate for a top-up when the exporting schedule has been over-optimistic.
I have imported about 30 units, half because of the need to recalibrate my battery - which imported slowly all day long including right through the evening peak! Maybe two thirds was flux top-up at 2 a.m.

It "tells me" it does all sorts of spikes of import and uninstructed export

Mine does the same (goodwe hybrid inverter) but tbh even with my selfsabotage in running ip to the max we average about 1/2 to 1.25kWh per day grid import. It used to bother me in the early years but its just the nature of the hybrid inverters. I don't think perfect is achievable. Well done on the first milestone MWh.

[Krill]

607 kWh generated according to PV inverter, 625 kWh generated according to battery inverter. I'll trust the former, thanks.

Down significantly compared to last years 777 kWh according the the battery inverter, but the weather has been naff here.

I've kept the battery (Luxpowertek) inverters set to import during the three hour Octopus Flux cheap slot, at a relatively efficient rate, and the batteries have generally disconnected after about 0900, only kick in at lunch time and then again when cooking tea. I think this is better than trying to self charge in the day at a variable rate, helps cut out the random little import/export bits and stops the inefficient low power charging (which I still get paid full export for); it is pretty much all exported at present. I've not bothered with force export during the 1600-1900 high export window, the AC/DC charge inefficiencies makes me think it isn't worth the inverter wearout (Have to push the inverters to make it work, even with fans cooling them they get hot, and then they stay hot at night trying to recharge).

I've been a bit lax reporting the last few months, but my system generated about 4.5 MWh in the first year post install. I think it's more swingy due to shading, but I know it can't hit the PVGIS estimated amount of 5.4 MWh/year.

All in all, I reckon that I'm on for an 8 year pay back period, partly due to significantly increased home power use (dehumidifier, a home PC server, plus another PC as game server for friends). if I added the 5kWp pergola system I expect that would pay for itself in 3 years max and then bring down total system breakeven point to about 6 years, back of the envelope style guesstimate.

This has made my parents reconsider PV, my father was dead set against it. Then he paid tax on interest from a bank account and he hates paying tax more than he hates changing his mind. I might have a ~15kWp system to add to nowty's secret list next year!