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I guess it would be technically possible to have a solar system with a battery but still be connected to the grid as backup. I have an existing 3.5kW PV system with Solis inverter. Some networks will allow larger sizes than those outlined below, pending specific approval from the network. Why on earth would I do that if I can help it. The loss figures above are for Sydney and are affected by the climate. When a home is exported limited, all the power the solar inverter can produce is available for the home to use. An Update: I just had system installed 4 days ago in the Energex DNSP and suggest the above is perhaps not quite correct. But you probably would not recover the cost of the battery within its lifetime. Definition A low voltage embedded generation connection in CitiPower and Powercor is defined as "an LV EG system with a total system capacity greater than 30kVA for a three-phase IES or non-IES (excluding ESS) network connection that is: Though endless quibbling over unnecessary details might keep the presses churning, a FACT remains that Ive been using ever-more-cost-effective batteries since 1980. 2. So having a powerwall is way less useful for helping with an export limit than you would think. The battery is charging from the DC current which is before the inverter. Sorry Andrew: NQR. Notify me of follow-up comments by email. Off the main grid, rural properties can have 3 kilowatts of inverter capacity. 0 Now, such a hybrid inverter, as I previously submitted as a post, as being needed, would have the capability of providing for up to 10kW of panels generating capacity, and, of power conversion of up to 10kW, to provide for up to 5kW to provide for charging a battery system, and, the other 5kW to provide for the household load and with surplus (to the household load, out of the 5kW provision) being exported to the grid. 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. My sister has the same type of inverter (Goodwe) but she lives in the Estern suburbs of Victoria and she has been exporting but her Power Limit was set OFF. You could have mentioned that SWER stands for Single Wire Earth Return and why that matters. Only residential homes with inverters of 5 kilowatts or less can receive the states. 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. I cant justify the cost of adding additional solar if the max I can export with Essential energy is 3kwh. Thats a furphy from go to whoa. Still a very long payback period, but not as long. At the moment a battery system is unlikely to pay for itself, but you could install a system that is larger than what makes financial sense for your current situation and hope home batteries will fall in price over the next few years. South Australia Power Networks (SAPN) area: SAPN is the only distributor in South Australia. Wouldnt it be better for the inverter to display its total actual potential output under current conditions? Unfortunately, SAPN wont allow more than 5 kilowatts of inverter capacity on an SWER line. I want about 10Kw of panels so I can run pumps etc. 0000037380 00000 n 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. 20% They want to do it there way and it seems my request complicates things for them and I dont hear back, bar a couple. 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. It is possible to max out the 10 kW inverter capacity with my Tesla, house load and Heat Pump hot water. Is it the 6.66 kW, as the 1.3 overload factor of a 5kW inverter, or, is it the maximum allowed (by the manufacturer) panels generating capacity, for an inverter that is allowed by a state/territory government? It appears the wire from the inverter is directly connected to my main fuse for the house circuits. Quotes vary and the deal has to be value/advantage logical or whats the point. An option is to take your pumps off-grid and run them independently off a separate off-grid solar system. I realise that Australian legislatures do not care about the future, but, the future is coming, whether the legislatures like it or not. Do the inverters prevent the production of energy by the solar panels when an export limit would otherwise be exceeded? Seem most solar places, even the ones the go on about how good they are, arent that good when presented with this, what seems to be a conundrum for them. embedded generation system to the CitiPower and Powercor low voltage networks. xref Typically in the Powercor area, the export limit is 5kW of exports for each single-phase household solar PV system. I have 13.25 kW of panels with a 9.8 kW LG Chem battery and a 10 kW inverter export limited to 5 kW. 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. 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. That is correct. Interesting article. ( 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. Its moderately cheaper and the solar feed-in tariff youll receive will lower your electricity bills and increase the amount of clean energy available for others to use. 10kW of inverters with 11.325kW of panels. Website link shows system producing well over 10 kW. Im in the same situation, except I have an existing 5kW system. Shane, you appear to be mixing up kW and kWh easily done! The Ugly: In these areas export limiting may not be allowed at all. I am a bit confused about export. The uptake of solar has surprised the powers that be so they are basically wasting free energy and penalizing the producers in the process. So what goes throgh the meter, in either direction, is the difference between what you generate and what you use. Solar export limiting, or 'export limiting', occurs most often when there is more power being pushed into the grid than it can handle. 3. 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. More information about the program and how customers can get the most out of their rooftop solar is available at www.powercor.com.au/solar-energy Also, given that export limited inverters (supposedly) work the same, regardless of the grid to which they are connected, why is it so, that states have different rules whereby some allow export limited inverters, and, some do not? If you are interested you can read about this here: https://www.solarquotes.com.au/inverters/mppt/. VAr (var % rated VA) We respect your privacy and you can opt out from the newsletter at any time. 0000038030 00000 n Please confirm the maximum export limit in the relevant section of this application.. 0% 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. The solar installer or customer must have sought and received pre-approval from us for the requested capacity of the generator. And Set Power Limit to 100%. We respect your privacy and you can opt out from the newsletter at any time. In contrast, most other network distributors set a strict upper limit on the size solar panel system you can install, typically 10kW for single-phase properties. In a Enphase system, only the Envoy can provide this. it is, kind of, effectively export limiting. Many Australian homes are not allowed to export more than 5 kW to the grid. Put down your weapons.3. 306 47 Since in WA you cant have more than a 5kW inverter on a private residence, I believe there isnt actually export limiting in play, and the inverter itself clips the output AC regardless how much the panels are generating, sadly. I havent made any applications yet, but Ill certainly be asking this question when I get quotes!. After all, Im a big picture kind of guy. I live in Warrnambool, Victoria. The daily export limit is averaged across your billing period (calculated by multiplying the number of days in your billing period by your daily export limit of 14 kWh). 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. Its located in Ausnet Services' Distribution Area but Ausnet is not part of the CitiPower, Powercor and UnitedEnergy . 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. ), Finally understand, the article above is very well written for the layman How is export limited for micro-inverters? 207 Has the oppressive authority in WA ever given a reason for not allowing export limited inverters in WA? Real names are preferred - you should be happy to put your name to your comments.2. But you may as well just get a standard inverter and send your excess electricity into the grid. 0000093063 00000 n We want to add a battery and it seems logical to add more cells also to another inverter/battery setup. 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. 5kW export limiter imposed on one inverter. What made the situation all the more frustrating is periods of high congestion which can threaten the stability of a local network can be quite brief. 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? Installers must also follow the recommendations of the inverter manufacturer and they may say the limit for panel capacity is less than one-third more than the panels capacity. In exchange, the customer receives a small rebate on their bill for every kilowatt-hour (kWh) they export. While the Envoy is an important part of the system, the micros largely operate independently of the Envoy, and in a lot of cases can work without the Envoy at all. Am planning to install solar 6.6 kWh system and upon checking with powercor they are giving export limit as 0 kWh. Have I been conned into believing I could produce up to 6.6kW myself, but in fact the maximum my inverter will ever allow through to the meter (and to my house) is only 5kW? 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. The ideal way to measure the power flow in and out of your house would be to ask your existing electricity meter. Recent work by Victorian DNSP Powercor on some problematic parts of its network is enabling more solar power from rooftop panels to be exported to the grid. 1. So it is unfortunate that it is necessary, but good that people can still install a larger system and generally have insignificant losses. 2. Voltage (V) measured at inverter terminals 0000038296 00000 n Please stay on topic. Definitely, thats an inverter that is export limited to zero. I still dont know if they have programmed the inverter to reduce the overall output by a percentage or not. But it seems the situation has been changing for the better in the last couple of months in a number of affected areas. Ready for some quotes? The standard relating to solar inverters is about to change. Worried the impact this will have currently when we charge an EV in the near term. 0000028638 00000 n Does anyone have similar experience with powercor? . 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. Generally however, I can advise that Powercor intends to upgrade the network over the next 5 years, starting in January, however, the specifics of where upgrades are happening and the order has not been decided. Im on a swer line in rural south Australia. If you are in the solar industry - try to get to the truth, not the sale.5. I dont quite understand how the DC energy from the inverter can go to my home circuits first, before any excess current is fed into the grid. NSWs Endeavour Energy area: Western Sydney. Amongst other things, AS4777.2015 has some requirements to shutdown on phase imbalance in a 3 phase setup. The Good: In these locations, properties can usually install up to 10 kilowatts of solar inverter capacity if they have single-phase power and up to 30 kilowatts with 3 phase power. 352 0 obj <>stream Unfortunately, the inverters parameters such as Export Limitation are all password protected, and so far I have been unable to even determine who knows this password. I installed 6.6kw solar panels and have Goodwe 5kw inverter and applied for export limit of 5kw. The whole system of domestic rooftop photovoltaic systems, needs to be reviewed; by both the legislatures and regulators, and, by the components (especially the inverters) manufacturers. 253 1. Long term benefits would be a more energy efficient system. But, if you are really keen, I suppose you could use a site such as PV Institutes Live PV Map to see how other solar systems in your general area are performing: Note that patchy cloud can produce a lot of variation in output. 0000027694 00000 n Thanks. No active system controls whether you use inverter of imported power. 0000037419 00000 n But there will often be times when the solar system will produce more power than can be exported, so some energy will be lost3. If that doesnt worry you then you can get a battery and just hope it mostly pays for itself. 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%. Finally! 258 NSWs Essential Energy area: Regional NSW. My AS4777.2:2015 profile allows voltages up to 265v (for short periods, and shuts down on 10 minute averages above 258v). A Decent Battery From sonnen. %PDF-1.4 % The good news is, even in a worst-case situation, the amount will be fairly minor. All I can really suggest is to try to shift power use to the middle of the day and hope mainly solar energy is consumed. Powercor is telling increasing numbers of households looking to install new systems in this area they will have a zero export limit. Im in regional WA with a rural 2 phase supply. It does this by adjusting the MPPT but instead of working to maximize power from the panels it reduces it. In my mind though the Smart meter at the box would adjust the export limit in line with what the house is consuming? Phone, email, give us feedback or make a claim. 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. There are versions without this consumption monitoring (old Non -s version of Envoy and even the Envoy-S without consumption monitoring). Youre using a total of four kilowatts to cook your lunch, so your home is exporting 4 kilowatts, which is below the limit. Powercor says the Solar Hotspots initiative is the first stage of a five-year Future Networks program to support customer investment in solar power systems, electric vehicles and battery storage. ) 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. But your situation is complicated by already having a 3 kilowatt system. Then the information that was left was cut to make the piece more introductory, but perhaps all these reductions made the article like my favorite World War II movie Abridged Too Far. Youll also start receiving the SolarQuotes weekly newsletter, keeping you up to date on all the latest developments on Australias solar scene. Your dedicated meter will inform the inverter, and it will immediately reduce the power, so it doesnt exceed 5 kilowatts1. 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?