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Aside from that, when you have high resistance lines, there is a voltage drop over their length. Is this correct? Or is there a build up of voltage in the system? This could be important, given that we have a state parliamentary election due in a couple of months. I am not sure whether it has been explicitly explained, but, what exactly, is the limit of panels generating capacity, that is covered by the federal solar panels rebate? For example, if you are export limited, only the Envoy-S with consumption monitoring can provide this. On a related note, we mentioned yesterday that over the border in South Australia, SA Power Networks is readying to ramp up flexible solar exports in an effort to support more solar installations and its pretty clever stuff. The power is first used to meet household consumption, with any surplus exported to the grid for other people to use. But there will often be times when the solar system will produce more power than can be exported, so some energy will be lost3. at night or not enough at day time ? So far I have not seen much more than 5kW DC anyway, but in summer I would expect to see a curve thats flattened at the top during the high sun phase, as it is cut off by the inverter. This profile also doesnt impose any export limits, because Endeavour Energy didnt require them of my installation (maximum is 30kW for a 3-phase installation, which my one is well under). Enter your postcode now. The solar PV system is connected to the network via an inverter. Finally! But this is at least partially because when you throttle back output, you also reduce the amount of voltage rise you are causing on your local connection to the point of interconnect which is probably contributing to the issue. What Happens to the Surplus Power That Can't Be Exported to the Grid? There are versions without this consumption monitoring (old Non -s version of Envoy and even the Envoy-S without consumption monitoring). What inverter do you have? Shane, you appear to be mixing up kW and kWh easily done! About 50%. So the solar inverter has to have its own energy meter installed in your switchboard one that talks to the inverter to tell it when power sent into the grid reaches the export limit. 0000004622 00000 n 0% The installation of solar photovoltaic systems as well as the correct inverter settings are critical to ensuring customers get the most for their investment in this technology. Single-phase properties can have up to 5 kilowatts of inverter capacity, and 3 phase properties can have up to 30 kilowatts. A rooftop solar system's grid export limit is determined by the local electricity network operator - sometimes on a case-by-case basis, sometimes according to an across-the-board standard, and . In addition, all modern solar inverters must comply with AS4777.2015 at least. And, depending on the circumstances of each individual household, 10-15 kW of total panels generating capacity, with limiting export to the grid, to 5kW, could provide better for the months with less available solar radiation, to lessen the demand for grid electricity, peaking on a seasonal basis. 0000093063 00000 n I am a total newbie to this but I am unclear why export limiting is good? And, no matter how powerful, the members of the legislatures imagine themselves to be, and, no matter how trump-like, they are, they can not stop the future. Economically this probably Is not viable, as our electricity bill is fairly low. 44% leading Hi All, Also note that for new installations in WA, only residences with inverters of 5 kilowatts or less can receive the states, Western Australias Western Power area: Perth and South West WA. 3. Up until quite recently, Powercor had been informing a large proportion of households looking to install new solar systems they will have to cop a zero export limit due to high congestion created by exports from existing systems. In future, will powercor allow export limit if they upgrade transformer? 1. But given average voltages are probably well above what they should be in lots of places, and once you factor in your local voltage rise, and pretty low values under AS4777 etc, there is not much room to play with until the distributors get the act together and deliver us power that better matches the 230v standard they are required to deliver us. When it comes to the limiting imposed by the electricity companies feed-in regulations, it means that, at any one time, not more than 5kW (100L) maybe be output to the grid (hose), it has nothing to do with the total over a certain period of time. I have previously posted (or, submitted for posting), the proposition that what is needed, is a hybrid (not meaning in this instance, a hybrid inverter as is commonly used) inverter that is like a cross/combination, of the Goodwe GW5000-MS inverter (or, kind of, the GW10K-MS, in terms of power conversion), and the Goodwe GW5048D-ES; three GW5000-MS provides for up to 10kW of panels generating capacity, across three MPPTs (strings? Website link shows system producing well over 10 kW. NSWs Ausgrid Network Area: This covers East Sydney, Newcastle, and out to Merriwa. As a general rule, 5kW tends to be the upper system size limit for single-phase connections, but some networks allow up to 10kW. In most cases, if you had your envoy shut off, the micros would start and work on their own and independently of the envoy, and in fact of each other. If you are interested you can read about this here: https://www.solarquotes.com.au/inverters/mppt/. 20% I have solar on my house and having it installed at an investment property, but not sure what to do now as there will be no benefit of feed in tariff. I have a new residential PV system in Perth WA, 6.6kW total panel capacity and a 5kW inverter (Growatt Min 5000TL-X). After a major works program involving more than 500 different network alterations and other activities across nine key regions among the most constrained parts of the network, Powercors new solar connections export approval rate of just over 60% at the start of the year has increased to above 90%. Please keep the SolarQuotes blog constructive and useful with these 5 rules: 1. . If the transformer capacity is limited, you could install solar initially with a low export limit (eg 1 kW) and then have your export limit increased when the transformer was . So, I am pretty much left in the dark about whether all the energy my panels are theoretically producing is being utilised, or (which is my fearful assumption) up to 1.6kW are wasted whenever the panels produce more than 5kW AC. If so, it would make replacing the whole system more viable which is exactly what I wanted to avoid (and such a waste!). But you probably would not recover the cost of the battery within its lifetime. Please stay on topic. The inverter reduces the amount of electrical energy supplied by the solar panels. My question is should that then eliminate the 5 kw inverter of the powerwall wich Energex claims is part of the 10kw allowance on a single phase? %PDF-1.4 % This gives the advantage of having a new system covered by a new set of warranties. I have divided Australias regions into three categories: The information below assumes the property is on the main grid. When a home is exported limited, all the power the solar inverter can produce is available for the home to use. Off the main grid, rural properties can have 3 kilowatts of inverter capacity. (2nd one APPROVAL/SITE SPECIFIC CONDITION(s): Total Solar Export must be limited to 5kW). The data has 5KW flat lining confirming more is being generated. Note that connections off the main grid are usually far more restricted. ), Finally understand, the article above is very well written for the layman "Some of these customers may have received approval to export since, due to network improvements made since their connection." endstream endobj 307 0 obj <>/Metadata 15 0 R/Pages 14 0 R/StructTreeRoot 17 0 R/Type/Catalog/ViewerPreferences<>>> endobj 308 0 obj <. Powercor's network solutions manager Claire Cass said of 32,580 customers connected to solar with Powercor in the last 18 months, only 2023 could not export power. 0000037497 00000 n Some say so you want to replace your system? and only supply me with power from the grid The word first can be confusing. Although my testing shows that the micros technically operate quite independently, it is important to understand, only the Envoy can provide some critical components to a properly working Enphase System. Tasmania: Under 1% of Tasmanians are on SWER lines, so the generous export limit should often be available. While installing solar panels can still be worth it under these conditions, its a disincentive, increases payback time and is generally a pretty crappy state of affairs. Most systems have mostly N facing panels, so really only generate peak power for a few hours a day (often 10am>2pm approx) I realise that all the political parties in the the WA state parliament and especially, the Synergy/Western Power conglomerate, that controls approvals of domestic rooftop photovoltaic systems connected to the SWIS grid, are opposed to domestic rooftop photovoltaic systems (even though we stabilise and sustain the grid), but, I am wondering whether any reason has ever been given by the oppressive authorities, for banning export limited inverters in WA. Youre using a total of four kilowatts to cook your lunch, so your home is exporting 4 kilowatts, which is below the limit. Providing the export limiting is done on the meter current as described above ( not on the inverter output current), you can generate more than the export limit if you are consuming enough power to make up the difference between generation and export limit. Hi Everyone, 0000005359 00000 n And, when battery powered road vehicles with adequate distance capacity (I have read that VW expects to release a battery powered station wagon, with range between charges, of 700km, in 2023 (although, unless Australia wakes up, such vehicles will be unlikely to come to this neolithic country) ) are available, and, even for the rare ones that apparently, already exist in Australia (having not yet seen a battery powered vehicle in Australia, I wonder whether they are simply an urban myth, as to their presence in this backward country), when would they get charged, if people would only charge them at home? While losses increase as the solar power system size goes up, even with 10 kilowatts of panels which is twice the export limit, only 13% of generation is lost. 0000011077 00000 n Ronald I think is is utter madness that the VIC government is handing out generous rebates of $1850.00 and 4 year interest free loans of up to $1850.00 and Powercor has zero feed in capacity for excess solar power. startxref Thanks Steve 0418 815 193. I suspect that it is likely, that that they are all signaled equally, not in truth I dont know for sure. 0000001757 00000 n So if an inverter that is export limited to 5 kilowatts is providing 8 kilowatts of power, none of it will go to waste provided the home is consuming at least 3 kilowatts at the time. To me it does not quite make sense as no system can produce 100% of its capacity meaning my existing 3.5kW will never produce full 3.5kW (on a good day, I am lucky to get 2.5kW). Theres more good news, with further improvements to come. Is this default, or would it be programmed in if the distributor required it? amended or replaced from time to time. Worried the impact this will have currently when we charge an EV in the near term. Im afraid thats a tough situation. Once voltage thresholds etc are configure in the profile by the Envoy at install, each micro operates largely independently. According to NT Power and Water they will normally allow up to a 5 kilowatt inverter with single phase power and up to a 7 kilowatt inverter with 3 phase power. By the time he was eight, he was already focused on using the power of the sun to stop fossil fuel emissions destabilizing the climate. Rubbing salt into the wound were situations where someone was zero export limited while their next door neighbour wasnt. Allows installation but has an export limit. It seems so strange that it is clear government policy to get more solar going and yet the network operators are effectively blocking it now. The percentage var/VA level leading is the inverter sourcing vars to the grid, whereas the percentage var/VA level lagging is the inverter sinking vars from the grid. Weve got a system that can be left alone in my opinion, so adding say 6.6kw and a 10kw battery makes good sense but what a task. so if I was correctly explained to, then I am limited to export less than 5kW (because my existing system will never produce 3.5kW), No installer (or their salepeople) is able to explain to me how the limiter is connected/set up in the scenario where I have 2 inverters. And for this reasons, I have increasingly seen that it is more challenging to run micros without the envoy which would no doubt be extra code required in later versions of the envoy to enforce implementation of various AS4777 and export limiting requirements that cant be done in the micros alone. Metered and a non metered version. I cant see any reference to the NT. If that is the case it seems counter intuitive to me as I dont know if demand will outstrip production until I actually turn the appliance (eg A/C) on and check the display. In a Enphase system, only the Envoy can provide this. The majority of customers are approved for the export level they request. Thank you. Normally it makes more sense to buy a second, separate system, than to expand an existing one. The current Envoy they will be selling is the Envoy-S. Before that was the straight Envoy which did not have the consumption monitoring / metering needed to do export limiting. 0000029011 00000 n But it seems the situation has been changing for the better in the last couple of months in a number of affected areas. Phone, email, give us feedback or make a claim. 00@ Oo Where do I find information on reapplying for export with Powercor? Sometimes Powercor can reduce that to a lower figure, or even set a zero-export limit. As the LG Chem battery charges using DC current from the panels it is possible to go over the 10 kW inverter limit by charging the LG Chem battery in the middle of the day. If you can export 3kva that means you can have a solar system with up to 4 kilowatts of panels. Were seeing a real lift in the number of customers able to export excess solar back into the grid in these areas, which were among the most constrained in our network only a few months ago, said Powercor General Manager Electricity Networks, Mark Clarke. It owns and operates the states largest electricity distribution network, and is responsible for more than half a million poles and over 88,000 kilometres of powerlines. 0000037686 00000 n March 2022 6 Powercor means Powercor Australia Limited, ABN 89 064 651 109. portal means the eConnect portal for CitiPower and . Its located in Ausnet Services' Distribution Area but Ausnet is not part of the CitiPower, Powercor and UnitedEnergy . What is the go generally with adding an additional solar system to your home? So basically the whole local industry is going to be cactus until this is resolved. So-called wasting of the extra electricity produced is irrelevant: sunlight is FREE, and whether I use it or not has no bearing on the environment. 0000027694 00000 n Amongst other things, AS4777.2015 has some requirements to shutdown on phase imbalance in a 3 phase setup. Heres what that means. STCs can be received for panel capacity up to one-third greater than the inverter capacity. I could easily share my excess power for the time I am not irrigating my crops. Western Australia Horizon Power area: Regional Western Australia. Okay, so that heading may be a bit of an exaggeration, but improvements the company has carried out appear to have made quite a difference. (We are conected to a 25Kw transformer, with 5 consumers connected.). 0000004059 00000 n Youll also start receiving the SolarQuotes weekly newsletter, keeping you up to date on all the latest developments on Australias solar scene. Was sure if its been configured correctly or if this is just how it works? 0000037419 00000 n First read the section How Export Limiting Works at the top of this thread. <]/Prev 115522/XRefStm 1575>> document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Download the first chapter of The Good Solar Guide, authored by SolarQuotes founder Finn Peacock, FREE! DC Input Power (Wp) 10000, from its published datasheet. 0000001260 00000 n driving range of 200km depending on ambient temperature. Normally single phase properties can have up to 5 kilowatts of solar inverter capacity and 3 phase properties can have 15 kilowatts. NSWs Endeavour Energy area: Western Sydney. And yes 5kW export limit applies May I suggest an extra fact check to polish the valuable story above? If you use a pre AS4777.3:2005 the limits are probably even higher, but you loose some other features (like frequency ramping which is probably very sensible to have if you want to be a good grid citizen), and you probably are not supposed to run those unless it is a pre 2016 install. They did say that with future upgrades we could reapply, but I cant find a way to do this. Because people have been refused any STCs for being just a few watts over, no installer will go over the limit for a normal installation. But depending on our network capacity, export constraints may influence the size of the unit they install. At times MPPT1 is at 600 odd watts while MPPT2 is at 2500 odd watts. Its only possible to go larger with a zero export limit: https://www.powerwater.com.au/customers/power/solar-power-systems/pv-class-requirements. At the time of the powerwall install I also had the Gateway installed at an extra cost so I could keep using the generated power from the powerwall and during solar production when the powergrit fell out without danger for the grit workers because the Gateway instantly falls and prevent power to the grit. Australian network service providers (including CitiPower) use solar export limits to keep voltage levels in transmission lines operating within safe . The following is a list of the areas in case youve been missed. For example, I can see several Energex profiles that do things like limit export to differing amounts, turns on Volt-var without Volt-watt, or sets the power factor to 0.9. Why on earth would I do that if I can help it. 5 kilowatt inverter + 6.6 kilowatts of solar panels (no export limiting): 0%, 6 kilowatt inverter + 8 kilowatts of solar panels: 4% loss, 7 kilowatt inverter + 9 kilowatts of solar panels: 8% loss, 8 kilowatt inverter + 10 kilowatts of solar panels: 13% loss, So, on the one hand, the Victorian Government is. I just dont understand it. (Image from Finns Tesla App). We installed 4.5kw with a 5kw inverter in 2014. They hid the problem pretty well, because they do tend to reduce the amount of shutdowns. (Or at least it will be expensive to set up well. Would the gateway signal the micro inverters to shut down one at a time, or to all reduce output equally? I have a 5kw solar system plus a Tesla powerwall 2 on my house . South Australian solar panel owners can currently export 5 kilowatts of electricity to the grid but under Flexible Exports, they could export double that amount 10kW. . Thanks for the information. Australian Rooftop Solar Powers Rise Astounding, But.. Australias Emissions: Electricity Down, Transport Up, Compare Feed-In Tariffs And Electricity Plans, Victorias Powercor Lifts Its Solar Exports Game, 3029: Hoppers Crossing, Tarneit, Truganina, 3030: Cocoroc, Derrimut, Point Cook, Werribee, Werribee South, 3551: Ascot (Greater Bendigo), Axe Creek, Axedale, Bagshot, East Bendigo, Emu Creek, Eppalock, Epsom, 3337: Kurunjang, Melton, Melton West, Toolern Vale, 3340: Bacchus Marsh, Balliang, Coimadai, Darley, Hopetoun Park, Long Forest, Maddingley, Merrimu, 3352: Bonshaw, Bungaree, Bunkers Hill, Burrumbeet, Cambrian Hill, Cardigan, Cardigan Village, Clarendon, 3305: Bolwarra, Cape Bridgewater, Gorae West, Heathmere, Portland, Portland North, Portland West, 3444: Baynton, Kyneton, Lauriston, Lyal, Metcalfe, Redesdale, Tylden 3465 Alma, Bowenvale, Daisy Hill, Maryborough. I have 3 x PV systems on one phase. SAPN has told me I cant have more than a 5 kw inverter , but thats just not enough. xref 0000007554 00000 n There may well be a tipping point in battery prices where a drought of mid day solar will be followed by very little evening use and possibly large numbers of households abandoning the grid altogether. ), converting to a maximum of 5kW of AC power, whilst the GW10K-MS provides for up to 13.5kW of panels generating capacity, across three MPPTs (strings? Thus, the question arises; if a single phase domestic rooftop photovoltaic system, involving a Goodwe GW-5000-MS inverter, and, 10kW of solar panels generating capacity, is installed (across up to three MPPTs), would the federal solar panels rebate apply to all of the 10kW of solar panels, or, to only the first 6.66 (or whatever is the exact applicable quantity) of the solar panels generating capacity? I have a 14kW solar array running Enphase IQ7+ microinverters (43 of them) hooked up to the grid in a 3-phase configuration in the Endeavour Energy area in NSW, and they currently have the profile AU default AS4777.2:2015 30kVa, Vv, Vw set. People have done it at fairly low cost with second hand panels and a DC pump.) AS4777.2:2015 has some rather low default recommendations, which can be tweaked up as no doubt my profile has allowed. I was always of the belief that a 5kW inverter limited the total output/ production from my 6.5kW solar system to 5 kW, irrespective of what is being used in the house. Select your country/region. You can see from the profile name that it ensures the microinverters conform to the AS4777.2:2015 Australian standard that governs inverters, and it enables the advanced Volt-var and Volt-watt controls for adjusting export power when the grid voltage gets too high (as opposed to abruptly shutting off all export power when grid voltage is too high, which happens without Volt-var and Volt-watt). But if people send a lot of power into the line then the voltage at the far end, instead of being lower than at the sending end, becomes higher. Solar export limiting, or 'export limiting', occurs most often when there is more power being pushed into the grid than it can handle. AC Output Data 0000000016 00000 n To get your quotes, please enter your postcode: AEMC: Electricity Prices To Continue To Fall, http://www.johnrogers.com.au/battery_charging_noon.jpg, http://www.solarquotes.com.au/blog/kw-and-kwh-what-is-the-difference/, Why Australian Solar Installers Love Austrian Fronius Inverters, Tesla Powerwall Price Takes A Tumble In Australia, "Snail Mail" Home Battery Offers: Be Wary, New Minimum VIC Solar Feed-In Tariffs Locked In, Glenrowan Solar Farm Construction Gets Cranking. To give you example, you will probably find the profile you mention is probably throttling from a very low 250v and will ramp down to 20% at 265v. We just applied for pre-approval from Powercor and were given a 0kW export approval which is going to make almost anything we choose uneconomical. Can I share my power excess with me neighbour? Enter your postcode now. 0000009573 00000 n If you can go outside and scream at the top of your lungs with no chance your neighbours will hear you, then theres a good chance you are off the main grid and face much stricter limits on exports. I guess it would be technically possible to have a solar system with a battery but still be connected to the grid as backup. Powercor's technical assessment aims for these works to enable at least 80% of new solar applications to export 5 kW. This extra meter adds to the cost of a solar system. This is done for three main reasons: In this article, Ill give a broad outline of how export limiting works and why it can be a good idea. The solar installer or customer must have sought and received pre-approval from us for the requested capacity of the generator. A man named Canute, proved that, centuries ago. As discussion of the topic of export limiting, is continuing, what,if any, is/are the direct effect differences to electricity grid load (as in the load on the wires, not the load as the term used for meaning demand), between a 5kW inverter, and a 10kW inverter with 5kW export limiting? Talking of which, the fact often gets dropped under the table that neither batteries nor panels and inverters (being mechano-electronic devices) have a limited life span, and their efficiency deteriorates gradually after only a few years. 0000037952 00000 n Its also unusual for a large solar system to have all the panels facing the same direction. My AS4777.2:2015 profile allows voltages up to 265v (for short periods, and shuts down on 10 minute averages above 258v). You could approach SAPN and ask for special permission to install more solar capacity on an SWER but I would not be optimistic about that. This seems technically impossible, because theres only a wire going from the inverter to the meter (the export or feed in to the grid) and a wire going from the meter to my homes main fuse. The loss figures above are for Sydney and are affected by the climate. 0000009027 00000 n But I will warn you, even with the high cost of grid electricity and the low solar feed-in tariff in Western Australia, batteries normally wont pay for themselves. Export limiting does limit the inverter output, but only as needed to keep the export power below the limit. So having a powerwall is way less useful for helping with an export limit than you would think. In looking to the future, regardless of whether we like it, in spite of, and, despite, the great efforts of the WA state government, and its parent, the Australian feral LNP/ALP government, battery powered road vehicles will come to Australia, and, displace ICE vehicles. I have seen my panels producing over 13 kW of power when the battery is drawing 3 kW DC power and the battery, house and car 10 kW of AC power. P/Prated (%) The naming of zones may differ between manufacturers but may appear as: Australia A - applies to the configuration of inverter settings in Victoria and all Eastern . Powercor claims 30% increase in rooftop solar export approvals Victorian network service provider Powercor claims a major works program designed to alleviate grid congestion in areas of high rooftop solar PV penetration has boosted the approval rate for new solar connections to export excess energy to the grid by an impressive 30%. embedded generation system to the CitiPower and Powercor low voltage networks. Also, if you are on the main grid the amount of power you are allowed to export can still be below the limits given or even zero, depending on how much additional solar capacity the local grid can handle at your location. It appears the wire from the inverter is directly connected to my main fuse for the house circuits. The solar PV system is connected to the network via an inverter. The Solar installer is telling me that they just started getting 0kW approvals back for about 9 out of 10 requests and so they dont believe they will be able to do many installs at all going forward. I was really keen for this system with a battery as most of my power is used at night and I like the idea of power during blackouts, which do happen quite a lot here. I realise that Australian legislatures do not care about the future, but, the future is coming, whether the legislatures like it or not. No active system controls whether you use inverter of imported power. Of course, if you are planning to get an electric car, that has the potential to make a huge difference to your self consumption of solar power. Hello. The fact that export limiting is necessary is not a good thing. If we consider a home in Sydney where no electricity is used during the day, and all the solar panels face directly north, then the percentage of output that will be lost due to a 5 kilowatt export limit would be: So even in a worst-case situation for Sydney, an 8 kilowatt solar system that is exported limited to 5 kilowatts will only lose 4% of generation. 260 Any ideas of how I can get a system that is actually going to generate enough power to charge a battery? South Australia Power Networks (SAPN) area: SAPN is the only distributor in South Australia. My assumption is (and I may be wrong after all) that the idea of using my own energy first before buying from the grid is an illusion, and in fact it only appears like that because all the energy from the inverter (up to 5kW) is measured as exported, all energy required by the house is actually imported from the grid (as if there was no solar system at all), and it is just because the exports are offset against the imports for billing, why it appears that my PV system is reducing the imports. 100% But there is also the DNSP rules which need to be followed. Actually I made a chart showing the percentage of electricity lines in each state that were SWER but I left it out for the sake of brevity.

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