E T
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Typical. Changing their minds every 5 minutes.Just been informed she's cancelled the appointment so that was a waste of Internet space but thanks for everyone's input
Typical. Changing their minds every 5 minutes.Just been informed she's cancelled the appointment so that was a waste of Internet space but thanks for everyone's input
Don't forget to let us how it goes.Lots of good tips thanks, made notes in me little book so I can quiz them tomorrow!
Given the open ended title can we keep this thread running a little longer?
Can I consult our tame Solar PV guru @Kayos ?
If I were to install a battery pack and an 'AC' inverter does the latest technology permit Island Mode operation for a domestic installation?
Pop into B&Q they have started doing panels & powerbanks etc.Lots of good tips thanks, made notes in me little book so I can quiz them tomorrow!
That PV generation figure seems very low, for an array of that spec. Is the inverter somehow throttling the energy you're producing, or are there significant losses somewhere?As a possible marker my installation consists of
14 Trina TSM-De09-05 390W panels with bird guards
SMA Sunny Boy SB 5.0-1AV-41-G99 Inverter
at a cost of £7070 inc VAT as at April 2022
I didn't bother with panel level optimisation as I'm fortunate enough to have no shading at all.
SSE facing(c.160deg). 45deg roof.
1/1/2023-31/12/2023
PV Generation: 309kWh
Self Consumption: 169kWh
Export: 140kWh
Import:760kWh
I can't make a battery payback. That may change if day/night tariff arbitrage improves.
Do you have a threshold for fitting optimisers Kayos? We (not me personally) have fitted these previously (grid scale farms, 5MW-20MW) and the outcome has been negative enough to remove them again, often used only in problem areas of the farms but still never been worth it.PV panels are connected together in a string, can be anything from 2 to 20+ panels per string. Shading of a panel will affect the voltage of the whole string, so we fit optimisers, basically voltage controllers that stop one shaded or damaged panel pulling the voltage down. They also send data down the DC cables so you can get realtime information from individual panels
Do you have a threshold for fitting optimisers Kayos? We (not me personally) have fitted these previously (grid scale farms, 5MW-20MW) and the outcome has been negative enough to remove them again, often used only in problem areas of the farms but still never been worth it.
My personal preference for a home install would be dual arrays, ideally ESE and WSW, as large as possible but it is so dependant on application, what your use profile is and what you want to achieve. A huge peak at midday is often wasted.
If you do change again and get a visit I think sharing the details here and asking for feedback would be more beneficial, don’t agree to anything just yet. Good news, panel prices have plummeted.
Sunnyboy inverters are very good as mentioned above, big premium over most others but they are high quality. SMA centrals are widely regarded the best in commercial applications and that’s the same company.
That PV generation figure seems very low, for an array of that spec. Is the inverter somehow throttling the energy you're producing, or are there significant losses somewhere?
From my calculations, a system like yours should be generating something more like 4700kWh/year, and that's with the panels lying flat on their backs.
The calculations are based on: https://www.fabhabs.com/solar-insolation-calculator for Warwick. As a check, the calculations were performed for another array that I have actual data for, and found to agree reasonably closely with the annual energy generation figures for that setup.
Over the year, the figure for Rugby comes out as being very similar to that for Warwick, although the monthly insolation figures are different - slightly higher for some months, and lower for others.Well spotted that man!
Syntax error in my @sum.
Revised:
PV generation 5038kWh
Self consumption 2177kWh
Import 3024kWh
Export 2862kWh
I managed to sign up to a 2 year fix back in March 22 at 17.28p/kWh import and later added export at 4.1p/kWh
That gives avoided import at 2177*17.28 = £376
Export revenue ar 2862*4.1 = £117
Total £493
Which is c. 7% ROI
I'm in Rugby. Put that in that estimator and see if it gets closer.
Very roughly; £500-£750 per kW for all new materials before installation. Lots of variation and potential additional costs for more complex roofs, expensive/quality brands, or savings to be had for scale or s/h components but that was the ballpark for the last couple home scale projects I did.Half the price if you DIY
still have the same problem after a year don't get VodafoneWill your app work with my broadband?
I recently assisted a neighbour who's PV monitoring app had stopped working since he had his broadband upgraded to full fibre. Turns out the data logger only connects to older wifi, and couldn't connect to the modern combined signal from his new router. Workaround was to turn off the 5GHz component on the new wifi, which kind of un-does some of the benefit of upgrading the broadband!
We certainly wouldn't have signed up to anything but it would have been interesting to see what they proposed, a lot of the sums still dont add up for usDon't forget to let us how it goes.
Or not just read the rest.
Very roughly; £500-£750 per kW for all new materials before installation. Lots of variation and potential additional costs for more complex roofs, expensive/quality brands, or savings to be had for scale or s/h components but that was the ballpark for the last couple home scale projects I did.
Could it be that the data logger is set up for a regional band plan that doesn't correspond to that set on the WiFi router? They should both be set to European or ETSI, or something similar. The setting may not be "visible" to an ordinary user. Something else to try might be router mode. Our router has 3 modes: 1 Performance (g/n and a/n/ac), 2 Compatibility (b/n/g and a/n), 3 Legacy (b/g and a). Only the first of the three modes allows "advanced features".Will your app work with my broadband?
I recently assisted a neighbour who's PV monitoring app had stopped working since he had his broadband upgraded to full fibre. Turns out the data logger only connects to older wifi, and couldn't connect to the modern combined signal from his new router. Workaround was to turn off the 5GHz component on the new wifi, which kind of un-does some of the benefit of upgrading the broadband!