May 2023 Generation

[marshman]

Self consumption is down to 59% but PV contribution to house load is 98%.
Unfortunately, the slow response of the Solis at points means I'll never fully eradicate import.

I have a Solis inverter and a heatpump in an "all electric house". I keep seeing references to the "slow inverter response" causing import to be measured. Last month according to the "Acrel" meter attached to the Solis I imported 0.04kWh. The "proper" electric meter measured 1kWh of peak rate and zero off peak for the month, but then it only has a resolution of 1kWh so could have carried over 0.996kWh from April! So I don't believe so called slow response is an issue.

0.04kWh in a month is mind-bogglingly low, I dream of being able to reach that.

I have a IHD from Glow (https://shop.glowmarkt.com/products/dis ... -customers) which communicates directly with the smart meter (ie the only meter that actually matters, the one I get billed via), but it's a lot more useful than most IHD as it can be connected to WiFi and spits out lots of data every 10 seconds:

Code: Select all

{
	"electricitymeter": {
		"timestamp": "2023-06-01T08:17:36Z",
		"energy": {
			"export": {
				"cumulative": 98.235,
				"units": "kWh"
			},
			"import": {
				"cumulative": 11530.720,
				"day": 0.037,
				"week": 0.533,
				"month": 0.037,
				"units": "kWh",
				"mpan": "xxx",
				"supplier": "Octopus Energy",
				"price": {
					"unitrate": 0.08250,
					"standingcharge": 0.41390
				}
			}
		},
		"power": {
			"value": 0.000,
			"units": "kW"
		}
	}
}

So this is directly from the electricity meters registers. Stuffing this into Grafana means I get extremely detailed import/export figures on a very granular basis.

I do concur with you on the huge kW power swings, I sometimes see many hundreds of watts or more in the "power" section, but they are very transient and the resulting "import/day" barely moves because of it.

That said, I do see persistent accumulating import/export - you can see above the week is 0.533kWh (the month is lower because its the 1st of June). I actually found it got worse after installing my Victron Multiplus. The Luxpower was actually better at keeping these closer to zero, which is a disappointment. I'm considering getting an ET112 or something which are supposed to be more accurate, but then the tradeoff is they're slower to react than a CT (which I'm currently using) so I'd likely be no better off.

All in all, it's only a few pence a day ultimately so I'm obsessing over tiny details. Just the OCD in me wishes my import/export could be maintained a lot closer to zero - not least because I'm not supposed to be exporting at all

Wonder if "Smartmeters" work differently to the "older" digital meters, i.e. have different sized "buckets" or different time constants.

[Joeboy]

1121.9kWh

Low 13,6kWh
High 56.6kWh
Average 36.2kWh

Destinations:
35% to house
27% to battery
38% to grid

Say it every month, need more battery (or another EV that can stay at home during the day!)

I'll have said it before but HWT and or storage heaters are a cheap way to store that excess. We certainly managed to stop using the WBS earlier in year due to spare solar that was placed in strategic chosen SH's. If I lived further South I'd have invested in mobile standalone aircon and ran it up to use excess. Just a thought.

[AGT]

I broke the 10kWh for Tuesday this week, never had the facility to log my generation before so interesting to see.
Only have 1.7kW on the roof but never mind it’s in the original FIT.

[Krill]

Capacity 6.4kWp
Orientation 199 degrees
Slope ~40 degrees
Lat 53.0
Generation 760kWh
Export 399.2kWh
Import 4.4kWh

PVGIS: 103% expected production

Best day: 24/5, generated 40.1kWh
Worst day: 8/5, generated 6.4kWh

Much closer to PVGIS expected production than April. Had to clean lots of guano off though and buy a ladder. Need Flux payments sorting (Octopus have been lying bastards to me since February but smart meter is being fitted on 22/6/23).

[Stinsy]

548.0kWh from my 4080+1080=5160Wp array.

Comes to 106.2kWh/kWp.

That is an all-time record month! Up until now my best ever month was 526.7kWh in May 2020 when there were no aeroplanes seeding the clouds, but that was just the 4080Wp array on its own. Until now both arrays together have failed to beat it. While I might make more power by throwing up more panels, I doubt I'll ever beat 129.1kWk/kWp (while we still operate an industrialised society).

[marshman]

548.0kWh from my 4080+1080=5160Wp array.

Comes to 106.2kWh/kWp.

That is an all-time record month! Up until now my best ever month was 526.7kWh in May 2020 when there were no aeroplanes seeding the clouds, but that was just the 4080Wp array on its own. Until now both arrays together have failed to beat it. While I might make more power by throwing up more panels, I doubt I'll ever beat 129.1kWk/kWp (while we still operate an industrialised society).

Yes May 2020 was my all time record by a big margin. Just shows what effect aircraft have !

[nowty]

Nowty Towers Power Station
Main 4kW PV system generated 563 kWh which is 3% above baseline and my 3rd best May in 12 years.
Would have been even better if my export limit was higher.
Total PV arrays generated 1335 kWh.

Electric Import was 105 kWh.
Gas import was 34 kWh.
Out of house EV charging was 69 kWh.
Petrol used in EV hybrid was 0 kWh.
Total imported energy use 208 kWh

Electric export was 145 kWh.
Ripple GF wind farm generated 460 kWh.
Total energy offset 605 kWh

Net energy import for Nowty Towers Minus 397 kWh

2023 (to date) Net Energy Import 2627 kWh

[dan_b]

Company solar

11kWp of panels, 10kW Solar Edge Inverter, SE orientation

1469kWh generation, of which
860kWh used in self-consumption and
610kWh exported to the grid.

Still managed to import 1450kWh in the month!

[Moxi]

Time for that battery Dan, the 610 export has a cost plus add the offset of the import and you would have paid for half the hydbrid inverter in one period! Doesn’t need to be an expensive set up and could even be 24 v to keep costs down.

Moxi

[JR]

2.5 system 10ZNShine panels Sunny Boy inverter Orientation 170 degrees south Inclination 30 degrees East Mids

May 2023 - 323

Worst generation May 2021 - 275
Best generation May 2020 - 385

Expected generation 279