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. (Or at least it will be expensive to set up well. 2. Sorry Andrew: NQR. ), converting to up to 10kW of AC power, and, the GW5048D-ES provides for up to 6.65kW of panels generating capacity, converting to up to 4.95 kW of AC power, and, acting as a battery management system and UPS, when a battery system (of up to two approved, low voltage, batteries) is connected. 0000005359 00000 n They hid the problem pretty well, because they do tend to reduce the amount of shutdowns. Please stay on topic. As a side issue for you, if you (like lots of people) have high voltages issue causing shutdown / throttling, I am not a big fan of the Volt-watt modes, as often these modes will also lower the voltages at which the throttling kicks in. the system is set to export the maximum amount of power approved in our Solar Export Pre-Approval to you your obligations as the owner and operator of an 'embedded generator' exporting . Export limiting does limit the inverter output, but only as needed to keep the export power below the limit. I could easily share my excess power for the time I am not irrigating my crops. Powercor is telling increasing numbers of households looking to install new systems in this area they will have a zero export limit. In my case, I have N & W facing panels, My inverters clip to 5Kw for a few hours, but I can still export a reasonable amount. Self confessed newbie to the mechanics of Solar so bear with me. Whats the logical and practical way forward? Store it and use it later (this requires solar battery storage), or it disappears into thin air via a heat sink. 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. ), 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? 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. I believe it must have been set up during installation, but the installer company claims that this is handled by Growatt themselves. ), Finally understand, the article above is very well written for the layman So the size of the system becomes irrelevant if you can only export 3kwh (we are Regional NSW Essential Energy). The word first can be confusing. 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. 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. I have a 5kw solar system plus a Tesla powerwall 2 on my house . you aren't allowed to export any power from your solar system to the grid. 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. This is disappointing as this would be an easy option to implement. Households and small businesses that generate electricity using solar panels, wind turbines, or other small-scale generators, can feed back any unused electricity into the electricity grid for other customers to use. That can raise the voltage to a level dangerous to appliances. Australian network service providers (including CitiPower) use solar export limits to keep voltage levels in transmission lines operating within safe . 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. 2. 44% leading 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. But youll need to be confident you wont be hit with high demand charges during the evening peak that will wipe out any advantage. But just note, not everyone Envoy has required bits to do export limiting. 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. Select your country/region. If they want a big solar system with an inverter larger than 5 kW, they must export limit the inverter. 0000009027 00000 n The reason why your sisters inverter is different from yours is your Goodwe would be because yours has a current transformer device that lets it limit the amount of power it exports to the grid. 0% No-one seems to have replied Dirk, so I will try. Below is the email response I received from Powercor. ACTs EvoEnergy Network Area: Covers most homes in the ACT, especially in built-up areas. 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. trailer Notify me of follow-up comments by email. Rubbing salt into the wound were situations where someone was zero export limited while their next door neighbour wasnt. Ronald was born more years ago than he can remember. As per current standards, a single phase premises is limited to 10kW generation and 5kW export. I also dont know if my meter has limiting but suspect not as it is a pretty dumb device. I was lucky to have an early approval, so limited to 10Kw (or due to bad calculation by the approver, 8.6Kw, where he said ALL the Neutral current went down the common Neutral wire, where in fact only the difference between the phases goes down the Neutral (2 phase, 180 degree). (Image from Finns Tesla App). 0000007057 00000 n Phone, email, give us feedback or make a claim. These consumption spikes go past the Solar energy being limited suggesting were drawing from the grid! Im in the same situation, except I have an existing 5kW system. 253 Quotes vary and the deal has to be value/advantage logical or whats the point. 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. 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. I think of it like the rate at which water is flowing out of a hose. 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. If your pumping needs are large enough this can pay for itself, but it will be expensive to set up. it is, kind of, effectively export limiting. If you are using Enphase microinverters which is extremely likely the whole system can be export limited using the Enphase Envoy gateway. About 50%. 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 . He first became interested in environmental matters when he was four years old after the environment tried to kill him by smashing fist sized hailstones through the roof of his parents Toowoomba home. 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. There are profiles that still conform the microinverters to AS4777.2:2015, but can disable Volt-Var/Volt-Watt, change the power factor to 0.9 (some grid operators require this), turn off export altogether or set specific maximum export levels like 1kW, 3kW etc., or configure to satisfy specific grid network requirements. What Happens to the Surplus Power That Can't Be Exported to the Grid? Origin offers 8 cents per kWh until a daily export limit of 14 kWh is reached. We are in an area where only about 20% of the homes have solar. I know in the movie the Bad was worse than the Ugly, but thats not the way Im doing it. And also is it worth installing solar with 0 kWh limit with self consumption around 20-30%( payback 6-7 years). hbbf`b``3 I j If you are export limited, the only way to implement that is with some sort of meter as Ronald says. Im trying to get some unbiased advice on whether or not we should add more solar. STCs can be received for panel capacity up to one-third greater than the inverter capacity. 0000038030 00000 n Queenslands Energex area: South East Queensland. This is assuming that my understanding of what I have read, is correct; that such a system would be permitted, in a single phase connection to the SWIS grid. A small solar system can be financially viable. Energex doesnt automatically allow inverters over 5 kilowatts to be installed with export limiting, but currently regularly grants permission for single-phase homes on the main grid to install up to 10 kilowatts of inverter capacity with export limiting. 0000038752 00000 n Now, that would help protect electricity grids, especially, the fragile, decrepit SWIS grid, for the present. Thus if my system is at maximum output, and I am using 2kW, only 3 kW is being exported to the grid. Thanks Ronald! I can also see specific profiles for other grid networks, such as Ausgrid and Ergon, that likely have specific requirements of the inverters. Heres what that means. Voltage (V) measured at inverter terminals Im in the Endeavour Energy area. Limited export means more power for home If your system has a limit on how much it can export then it means more power will get used in your home instead. 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? Some say so you want to replace your system? Im in regional WA with a rural 2 phase supply. Your meter is on the connection between the mains network on one side and the combination of your inverter and your loads on the other side. So, if a contractor or tradesman, using one of these during the day, or, another type of worker, gets home after work, and, plugs one of these in to charge, an immediate drain of 7 kW (I believe that it is actually 7.4 kW), and immediate significant drain is imposed on the grid, for several hours, during peak demand. Does anyone have similar experience with powercor? 0000037764 00000 n I realise that Australian legislatures do not care about the future, but, the future is coming, whether the legislatures like it or not. So in effect I have two safety guards in place, 1. the 5kw limiter to the grit and 2. the extra Gateway . We do not prevent customers from installing solar for their own self-consumption. Depending on their location, some may be constrained to a lesser export level or even no exports at all. 3. The solar installer or customer must have sought and received pre-approval from us for the requested capacity of the generator. Generation sources can be, but are not limited to solar, wind and batteries. 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). 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. 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, Powercor's new solar connections export approval rate of just over 60% at the start of the year has increased to above 90%. hour of charging is enough to drive 35km.. 0000000016 00000 n Even if you have the Envoy-S, I believe at least on paper there was a Enphase Envoy-S But a sub optimally configured grid sometimes forces installers into implementing setting that are probably less than ideal if the high voltage events in the grid were just occasions where there is too much generation and they do want have all generators throttle back to allow some time for rebalancing supply and demand. <]/Prev 115522/XRefStm 1575>> Why my Power Limit is set to ON with the % whereas her Power Limit is set to OFF and she has been exporting. The following is a list of the areas in case youve been missed. The loss figures above are for Sydney and are affected by the climate. There are exceptions for off-grid installations and systems that are installed with a battery. While there are some energy management measures that could help around the edges, I cant think of any good solutions for the typical business. What I find is installers dont seem to like it when I tell them my plan. 60% lagging 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. So it is unfortunate that it is necessary, but good that people can still install a larger system and generally have insignificant losses. The ideal way to measure the power flow in and out of your house would be to ask your existing electricity meter. just wondering if anybody can shed some light on the following, Victorias AusNet network area: The eastern third of Victoria, not including Melbourne or French Island. Solar customers who currently have a limit on the amount they can export are invited to contact Powercor to reapply for an export agreement based on the greater capacity now available on the network. Voltage (V) measured at inverter terminals 220 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. P/Prated (%) Technically, what will happen is the inverter will reduce the solar systems output so the generation will be forgone, but I dont want to go into too much detail in this article. We have a 3kwh system and are really using as much during the day as we can. I have just had a 6.6kw system installed with a Fronius 5kw inverter and am export limited to 3kw. Thanks. NSWs Endeavour Energy area: Western Sydney. I guess it would be technically possible to have a solar system with a battery but still be connected to the grid as backup. Am I wrong? Can you provide comment and evaluation of power tracing please. The good news is, if you had a total of 6.6 kilowatts of solar youd probably loose very little due to export limiting if you consume half the output of a 3 kilowatt system and can export 3 kilowatts. Our Solar & Battery Calculator can give an idea of if its likely to pay: https://www.solarquotes.com.au/solar-calculator/. Your dedicated meter will inform the inverter, and it will immediately reduce the power, so it doesnt exceed 5 kilowatts1. And yes 5kW export limit applies May I suggest an extra fact check to polish the valuable story above? If a home cant export any power at all then there is no financial reason to install a large solar system. My solar installer applied to Powercor to install a 5.4kw system at my Point Cook address. Weve seen a rapid growth in rooftop solar systems.With each installation, were facilitating rapid growth in the amount of solar capacity on our network. The MSO helps us manage and keep our network safe for solar customers. 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. Means that it caps the amount you can reduce your bills for power used outside of daylight hours? So my understanding of the info above is that my inverter will increase production in unison with demand until it hits 5kw? Victorias Powercor area: Western Victoria, including a large portion of West Melbourne. 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. 1. At times MPPT1 is at 600 odd watts while MPPT2 is at 2500 odd watts. 0000029011 00000 n 260 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. The solar PV system is connected to the network via an inverter. Tasmania: Under 1% of Tasmanians are on SWER lines, so the generous export limit should often be available. Sometimes Powercor can reduce that to a lower figure, or even set a zero-export limit. Hi However they have been advised that this wont be allowed anymore. We respect your privacy and you can opt out from the newsletter at any time. It is possible to max out the 10 kW inverter capacity with my Tesla, house load and Heat Pump hot water. Have a good christmas. The new home didnt have solar. Please make sure you engage early with our team through eConnect to check on network capacity for your customers. This is often referred to as 'network constraints'. I am not even sure the inverter would support that, but I fear that sadly up to 25% of the PV energy might be going to waste! I have an existing 3.5kW PV system with Solis inverter. Normally single phase properties can have up to 5 kilowatts of solar inverter capacity and 3 phase properties can have 15 kilowatts. A 5 kilowatt inverter will never supply more than 5 kilowatts of power no matter how many kilowatts of panels it has. 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. 0000008043 00000 n 10kW of inverters with 11.325kW of panels. hb```f``sd`c`edd@ A >hp`86s8::\ MNmOe0pYuR`i g G7@ $n@]A#&S_2.dx f 20% I have divided Australias regions into three categories: The information below assumes the property is on the main grid. Queenslands Ergon network area: All of Queensland on the main grid outside of South East Queensland. 0 0000027694 00000 n 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. As has been explained (and COSTED) on previous occasions batteries are VERY cost-effective.IF you stay away from the hi-tech/overpriced/dependence-creating/unproven battery-systems advocated by commercially self-interested parties. Is this perhaps one of the well-kept secrets about the reality of residential solar production in Western Australia, one that neither the solar installers or inverter manufacturers, let alone Synergy or Western Power want to be publicly known? Im surprised this hasnt hit the mainstream media yet. 240 This seems to be becoming a big problem at least locally. So while the article suggests 10kW inverter ( 13.33kW DC) in fact the limit seemed to be 10kW DC ( hmmm what does 10kW generation mean exactly ?.) Allows installation but has an export limit. 0000001260 00000 n 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. Youll also start receiving the SolarQuotes weekly newsletter, keeping you up to date on all the latest developments on Australias solar scene. Theres more good news, with further improvements to come. But still the solar companies keep trying to sell it to me.. If they face in two or more directions, it will further reduce the losses by reducing the peak solar output while stretching it out, so it lasts longer through the day. 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. embedded generation system to the CitiPower and Powercor low voltage networks. 0000018244 00000 n Thanks so much, David. Some battery powered cars can not be programmed to only recharge at particular times of the day, and, so, if someone drives one to work (that is, if and when battery powered cars become affordable to the working class) and home after work, then puts the car on the charger, the drain to the grid, that would consequently occur, during peak demand hours, needs to be covered. JackD 1 year ago. When an inverter is export limited, it has to know how much solar energy is being sent into the grid so it can immediately reduce output if its about to go over the limit. You could have mentioned that SWER stands for Single Wire Earth Return and why that matters. 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. As such, unless the investment pays for itself within at most 5-6 years, IMHO it is not a good investment/waste of money and natural resources. Still, few people will want more than the 13.33 kilowatts of panel capacity single phase homes can generally install: The Bad: Homes with single-phase power on the main grid can have up to 5 kilowatts of inverter capacity but can usually get around this limit by installing an export limited solar inverter of up to 10 kilowatts. I will update the article with the information. An Update: I just had system installed 4 days ago in the Energex DNSP and suggest the above is perhaps not quite correct. 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. Under another option to . Finally! See image at http://www.johnrogers.com.au/battery_charging_noon.jpg. 0000037419 00000 n This extra meter adds to the cost of a solar system. But if you had a larger solar system with a larger inverter that was export limited to 5 kilowatts it could potentially supply 2 kilowatts to your home while exporting 5 kilowatts to the grid. 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. 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. Please stay on topic. . I think that the limiter can connect only to one inverter and not two at the same time. Here at SolarQuotes, we had been hearing quite a few complaints about Powercors zero export limits. Thanks Ron. We are on a zero limited export. 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. 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. 0000039096 00000 n If so, it would make replacing the whole system more viable which is exactly what I wanted to avoid (and such a waste!). The new inverter standard AS/NZS 4777.2:2020 has new inclusions to address grid stability issues - a new feature that is necessary to further enhance the hosting capacity to accommodate more solar and renewable energy systems. This certainly goes well beyond initial configuration and reporting. And doing so potentially puts you running in a non compliant state. 207 AS4777.2:2015 has some rather low default recommendations, which can be tweaked up as no doubt my profile has allowed. 220 0000017636 00000 n Nobody wants to see solar energy . (Although they will also allow an additional 5 kilowatts of battery inverter capacity.) Similarly, which would be more detrimental to a fragile electricity grid, through power exporting; a 5kW inverter with no export limiting, or, a 10kW inverter, with export limiting set to 1kW? 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. If your solar company provides you with the Solar pre-approval (SPA) number for your pre-approval, we can check specifically what was decided on with regards to exporting. Where do I find information on reapplying for export with Powercor? We might still be willing to do this all the same, from an environmental viewpoint. Victorias CitiPower area: The Melbourne Central Business District. 2. Select the AS/NZS 4777.2:2020 Australia A setting. 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. And, if a street full of these, plugs their cars into the grid, for recharging, starting the recharging between 1700 and 1800, lots of entertaining fireworks, along the street powerlines exploding. Nominal Output Power (W) 5000 I havent made any applications yet, but Ill certainly be asking this question when I get quotes!. Please confirm the maximum export limit in the relevant section of this application.. ( Once voltage thresholds etc are configure in the profile by the Envoy at install, each micro operates largely independently. 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 majority of customers are approved for the export level they request. Single-phase properties can install inverter capacity up to 5 kilowatts while 3 phase properties can install up to 30 kilowatts. 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? I installed 6.6kw solar panels and have Goodwe 5kw inverter and applied for export limit of 5kw. Fronius Wattpilot: A Smart EV Charger With A Short Warranty, You Wont Believe How Dumb The NSW Governments New Battery Calculator Is. Sorry if dumb question. 1. 0000037686 00000 n 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. We just had a 30kW inverter solar install for our business and it has been limited to 1.8kW export. But, if you are living in an area where it is required to install a large solar system a situation around half of Australians are in then export limiting can allow a larger system with normally very minor losses of clean solar generation. I have spoken to one installer , but he couldnt really help me . 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. Even if I were exporting 100% of it, it still would only bring down my bills by a tiny amount per month. Am planning to install solar 6.6 kWh system and upon checking with powercor they are giving export limit as 0 kWh. Because you dont see the rather obvious shutdowns (or see them less), you might not notice your solar might be throttled back on a regular basis. 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. 100% Wouldnt it be better for the inverter to display its total actual potential output under current conditions? Export limiting generally isnt permitted. 0000010080 00000 n If you can export 3kva that means you can have a solar system with up to 4 kilowatts of panels. ) Youll also start receiving the SolarQuotes weekly newsletter, keeping you up to date on all the latest developments on Australias solar scene. 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. 207 SAPN has told me I cant have more than a 5 kw inverter , but thats just not enough.