Gerrie Posted September 8, 2020 Posted September 8, 2020 I’ve been wondering how much generation in Rand per day vs. Total cost of solar installation. Can it be compared or calculated in some sort of ratio. My own 4KW system generated this over a 24Hr period. I ran my 3.5KWH pylon tech down to 12% SOC last night, so: Last nights battery use = 2.9KWH Today sunlight use = 5.3KWH (mixing pv & battery) Battery again fully charged at 14H00 Total = 8.2KWH/day @ R2,20 = R18.04 for today on a R55K system. Anyone with similar or better cost ratio? Is R18.04 saving per day worth the R55K spent. Richard Mackay 1 Quote
wolfandy Posted September 8, 2020 Posted September 8, 2020 32 minutes ago, Gerrie said: I ran my 3.5KWH pylon tech down to 12% SOC last night I would strongly recommend not going below 20% SOC - as apparently the lifespan on the Pylon decreases dramatically when doing so 33 minutes ago, Gerrie said: Anyone with similar or better cost ratio? Is R18.04 saving per day worth the R55K spent. A screenshot from my ICC below. I have 4x Pylons though... (and am using R2.03/kWh for the calc) Gerrie and bobmabena 2 Quote
Gerrie Posted September 9, 2020 Author Posted September 9, 2020 7 hours ago, wolfandy said: I would strongly recommend not going below 20% SOC - as apparently the lifespan on the Pylon decreases dramatically when doing so I was s bit guilty of abusing the pylon but it was the first time, normally the pylon never goes down below 40% SOC. 7 hours ago, wolfandy said: A screenshot from my ICC below. I have 4x Pylons though... (and am using R2.03/kWh for the calc) Four pylons, it strongly reflects on that 0.00 Grid kWh used. Thanks for sharing. Quote
MongooseMan Posted September 9, 2020 Posted September 9, 2020 (edited) 17 hours ago, wolfandy said: I would strongly recommend not going below 20% SOC - as apparently the lifespan on the Pylon decreases dramatically when doing so A screenshot from my ICC below. I have 4x Pylons though... (and am using R2.03/kWh for the calc) Out of interest (and this may be an ignorant question), can you not sell the excess kWh back to the grid on the days you generate surplus? That'd push the cost savings up even more. Edited September 9, 2020 by MongooseMan Quote
wolfandy Posted September 9, 2020 Posted September 9, 2020 3 hours ago, MongooseMan said: Out of interest (and this may be an ignorant question), can you not sell the excess kWh back to the grid on the days you generate surplus? I don't think that my old Axperts are capable of feeding back to the grid And when I originally looked at it, COCT had not made it very attractive (granted this was mid last year and things might have changed since then) Quote
MockTurtle Posted September 10, 2020 Posted September 10, 2020 nah, stil the same - for residential (single phase 60A breaker) feeding back to grid is not worth it for CoCT. iirc they will limit you to total of 3.5kwp panels for grid tie ? what a joke. Quote
Tariq Posted September 11, 2020 Posted September 11, 2020 CoCT wants around R12,000 for the bidirectional meter that allows feedback Quote
Gerrie Posted September 11, 2020 Author Posted September 11, 2020 56 minutes ago, Tariq said: CoCT wants around R12,000 for the bidirectional meter that allows feedback This pushes the ROI to outer limits and seems to be going to a point of no return. It’s like Catch-22 for grid tie. Quote
PaulinNorthcliff Posted September 11, 2020 Posted September 11, 2020 Flying in the face of the national crisis which is the failing of the national electricity generation capacity, the refusal of national and local authorities to gratefully accept ANY extra watts flowing into the grid by over-producing domestic generation systems is illogical and counter-productive at best, and treasonous at worst. Quote
Fuenkli Posted September 11, 2020 Posted September 11, 2020 3 hours ago, PaulinNorthcliff said: refusal of national and local authorities to gratefully accept ANY extra watts what is the present situation regarding the IPP and SSEG implementation in South Africa? I am not following the local politics anymore (to depressing) Quote
PaulinNorthcliff Posted September 11, 2020 Posted September 11, 2020 I see the City of Joburg and all of it's 'services' (water, electricity, waste) now style themselves SOC (State Owned Company). What the hell? They are paid for and owned by the Ratepayers (you and me). They are not supposed to turn a profit. And yet they are run 'for profit'. They NEED to sell you electricity because they turn a large profit on it! They would rather see us sit in darkness than sacrifice a revenue stream. Quote
Fuenkli Posted September 11, 2020 Posted September 11, 2020 1 hour ago, PaulinNorthcliff said: They would rather see us sit in darkness than sacrifice a revenue stream. I think the problem is, that the law still does not allow municipalities/cities to purchase electricity from IPP's. Quote
Tariq Posted September 11, 2020 Posted September 11, 2020 You can sell back, if you want to pay about an extra R120 per month fixed cost plus buy a R12,000 bidirectional meter Quote
Fuenkli Posted September 11, 2020 Posted September 11, 2020 10 minutes ago, Tariq said: You can sell back true, but on top of it you have to remain a net consumer . Quote
introverter Posted September 11, 2020 Posted September 11, 2020 (edited) 1 hour ago, Fuenkli said: I think the problem is, that the law still does not allow municipalities/cities to purchase electricity from IPP's. I suspect even if/when they can purchase from IPP's little will change in terms of trying to not lose the revenue stream. Even if assuming the more nefarious motivations are absent, the income from electricity sales, other than electrical infrastructure upkeep/expansion is potentially also used to fund various other projects (roads etc.). To some extent I think the better your local municipality appears to be run the more likely it is that the lost revenue from electricity sales will not go unnoticed... 41 minutes ago, Tariq said: You can sell back, if you want to pay about an extra R120 per month fixed cost plus buy a R12,000 bidirectional meter Try R429 per month basic fee...having to remain a net consumer and municipality purchasing at a lower time based rate than you are paying (to remain net consumer) Edited September 11, 2020 by introverter grammar..spelling..the usual Fuenkli 1 Quote
Tariq Posted September 11, 2020 Posted September 11, 2020 Oh, did not know that, I thought it was about R289 for CoCT , as we are already paying a basic fee of about R160 plus the R120 odd for feed in Quote
introverter Posted September 11, 2020 Posted September 11, 2020 (edited) 1 hour ago, Tariq said: Oh, did not know that, I thought it was about R289 for CoCT , as we are already paying a basic fee of about R160 plus the R120 odd for feed in No man, slaapstad already has the mountain and almost everything else - you guys can't also have the highest basic fee - leave something for the rest of us (was totally unclear from my post but the R429 is not for CoCT... aim a bit west...EDIT: mean east).. at one stage it appeared to me that google indexed more documents/conference/indaba info about setting SSEG tarrifs and the impact on municipal revenue than info about technical standards and incorporating SSEG to the grid.... anyone bored enough can scan through here for instance Edited September 11, 2020 by introverter EDIT Quote
Tariq Posted September 11, 2020 Posted September 11, 2020 (edited) You are right, you can have the R429 basic fee, it sure is painful to see a 4.3 kWp solar array sitting idle half the day Edited September 11, 2020 by Tariq . introverter 1 Quote
Tariq Posted September 11, 2020 Posted September 11, 2020 Just now, Tariq said: You are right, you can have the R429 basic fee, it sure is a painful to see a 4.3 kWp solar array sitting idle half the day Quote
Fuenkli Posted September 12, 2020 Posted September 12, 2020 13 hours ago, Tariq said: it sure is painful to see a 4.3 kWp solar array sitting idle half the day and your neighbor running his pool pump with dirty Eskom power Quote
Krokkedil Posted September 12, 2020 Posted September 12, 2020 for some stupid reason i can copy or print screen my data from my ICC. I am running VNC viewer but i cant copy it. I have been struggling with low efficiency and low savings on my system since i installed it. 2 Weeks ago I upgraded my battery to Lithium. Now i am saving on average R25 /day Quote
Richard Mackay Posted September 12, 2020 Posted September 12, 2020 12 hours ago, Fuenkli said: and your neighbor running his pool pump with dirty Eskom power There's no dirty Eskom power in CT. There's an environmentally friendly green nuclear power station supplying you guys! Fuenkli 1 Quote
MongooseMan Posted September 14, 2020 Posted September 14, 2020 Just checking, are all Cape Town people with approved solar installations charged according to this table whether they feed-in or not? Or is that only for feed-in customers? Source: http://resource.capetown.gov.za/documentcentre/Documents/Financial documents/Electricity Consumptive Tariffs.pdf @Tariq, I can't see the R160/R120 on there, am I looking in the wrong place? Quote
PaulF007 Posted September 14, 2020 Posted September 14, 2020 Getting back to the Original question If I do the same "Straight-line" comparison I use about 12 kwh of alternative energy (Solar + Batts) so this will give me R 63 saving per day. Keep in mind I live on a farm with prepaid but no line rental so the price per unit is very high but I only pay for what I use from the grid. Quote
Tariq Posted September 14, 2020 Posted September 14, 2020 (edited) i believe the tariff's are for feed in only. i am on the standard tariff Edited September 14, 2020 by Tariq . MongooseMan 1 Quote
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