Thats a furphy from go to whoa. If at any moment in time you are generating more solar electricity than you need, the excess is exported to the grid. Please confirm the maximum export limit in the relevant section of this application.. Any ideas of how I can get a system that is actually going to generate enough power to charge a battery? 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. %%EOF Amongst other things, AS4777.2015 has some requirements to shutdown on phase imbalance in a 3 phase setup. 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. It is delivering 8 kilowatts of solar power. I have divided Australias regions into three categories: The information below assumes the property is on the main grid. I still dont know if they have programmed the inverter to reduce the overall output by a percentage or not. 0000037952 00000 n First read the section How Export Limiting Works at the top of this thread. 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. While export limiting is possible its not always approved. Thanks so much, David. If your pumping needs are large enough this can pay for itself, but it will be expensive to set up. The distributor deals with that by putting the voltage slightly up at the sending end. Ready for some quotes? 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? Michael caught the solar power bug after purchasing components to cobble together a small off-grid PV system in 2008. 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. As a single example, the Renault Kangoo ZE van (I think that it is the only battery powered cargo van currently available in Australia) has a 33kWh battery, and, To go further, Kangoo Z.E boasts a Z.E 33 (33kWh) battery, 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. Despite the low feed-in tariff you will receive it can still be worthwhile, especially if you can shift some electricity consumption to the middle of the day. Powercor says it has contacted all solar customers within the previously impacted areas to let them know about the companys progress and to encourage them to consider reapplying for exports. Were continually investing in our networks and aim to keep customers informed if additional export capacity becomes available in their area. 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. 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. Why on earth would I do that if I can help it. 0000038562 00000 n But there is also the DNSP rules which need to be followed. 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. 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. Its becoming common for solar inverters to be export limited, so the maximum amount of power they send into the grid is less than theyre capable of providing. Finally! This is sufficient to charge a battery, although larger solar systems generally improve the return from batteries. I prefer a profile that just has the voltages set to a high voltage threshold, and if I have to sacrifice V-W mode, so be it. 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. So, the whole of the system of restrictions and available components, for domestic rooftop photovoltaic systems, needs to be reviewed, to provide for greater usage demands during peak demand hours, greater battery storage provisions (and financial assistance for householders to implement big behind the meter battery storage systems, and, regarding the fragile, decrepit SWIS grid, the allowance of large capacities of panel generation, limited export, inverters, such as the hybrid one that I proposed. I have an existing 3.5kW PV system with Solis inverter. Information on whether export limiting is allowed can be found here, but I am going to present the information differently for both ease of use and to make my boss think Ive done something useful. Notify me of follow-up comments by email. 60% lagging Just last week, Powercor (Western Victoria) advised that they now have more room in the grid for export. The battery is charging from the DC current which is before the inverter. 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 . 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. 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. The fact that export limiting is necessary is not a good thing. Voltage (V) measured at inverter terminals 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. 0 This seems to be becoming a big problem at least locally. But if you dont use much electricity it may need to be very small, as I explain here: https://www.solarquotes.com.au/blog/zero-kw-export-solar/. essential enrgy in central west nsw (Orange) are generally restricting to max 5kw export limit regardless of 1ph or 3ph: 2 x 3ph residential applications approvals cutnpaste below only difference was one specifically stated APPROVAL/SITE SPECIFIC CONDITION(s): Total Site to be export limited to 5kW 3 phase 1.66kW/per phase (and the padmount sub for the subdivision in on the property boundary) startxref 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%. You could buy a battery, charge it on the weekend and export during week nights. 11kW panels with 10kW 3-phase inverter (Fronius Symo + Fronius 3-phase meter). Now, that would help protect electricity grids, especially, the fragile, decrepit SWIS grid, for the present. trailer The good news is, even in a worst-case situation, the amount will be fairly minor. A 5 kilowatt inverter will never supply more than 5 kilowatts of power no matter how many kilowatts of panels it has. This extra meter adds to the cost of a solar system. 2. 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. 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. How to correctly configure inverter settings. it is, kind of, effectively export limiting. 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. But just note, not everyone Envoy has required bits to do export limiting. But I suspect for a lot of people, the vast majority of these over voltage events are simply because the networks are running out of spec voltages. Am planning to install solar 6.6 kWh system and upon checking with powercor they are giving export limit as 0 kWh. 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. 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. However they have been advised that this wont be allowed anymore. Good question Tony. 0000007554 00000 n given that we are working from home all the time these days. That would provide both export limiting, and, the incorporation of a battery system (for my household, if we would have a 6.6 kW panels generating capacity system, rather than the 5kW one that we have, something like the BYD LVS 20 or 24kWh battery tower, would, I believe be appropriate), which would provide for energy arbitrage, smoothing both power exported to the grid, and, power imported from the grid, especially during peak demand periods. 0000006578 00000 n 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. sonnenBatterie Evo. It does this by adjusting the MPPT but instead of working to maximize power from the panels it reduces it. you aren't allowed to export any power from your solar system to the grid. Please make sure you engage early with our team through eConnect to check on network capacity for your customers. The inverter reduces the amount of electrical energy supplied by the solar panels. The MSO helps us manage and keep our network safe for solar customers. After (almost) three months with no reply, has any reason been given, as to why export limited inverters are not allowed for single phase grid connections to the SWIS grid in WA? 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. Thus if my system is at maximum output, and I am using 2kW, only 3 kW is being exported to the grid. 0000009027 00000 n After all, Im a big picture kind of guy. 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. 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. Even then, the losses from the limit are minor. 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. Some manufacturers may have this pre-selected. Wouldnt it be better for the inverter to display its total actual potential output under current conditions? If you are in the solar industry - try to get to the truth, not the sale.5. 220 JackD 1 year ago. I do NOT have a device in my meter box that could tell the inverter anything about consumption and feed in energy. It clicked, not long after I wrote the comment, My 10 kW system will not go above 10 kW unless my house battery is charging and then it can go to 13.25 kW. The data has 5KW flat lining confirming more is being generated. just wondering if anybody can shed some light on the following, But there will often be times when the solar system will produce more power than can be exported, so some energy will be lost3. Hi All, The standard relating to solar inverters is about to change. The following is a list of the areas in case youve been missed. 0000037764 00000 n 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. 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. Has the oppressive authority in WA ever given a reason for not allowing export limited inverters in WA? Have a good christmas. Only residential homes with inverters of 5 kilowatts or less can receive the states. 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. It appears the wire from the inverter is directly connected to my main fuse for the house circuits. Real names are preferred - you should be happy to put your name to your comments.2. 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 am on my second Tesla EV and the new one has a rage of 700km if youre not a lead foot. Export limiting does limit the inverter output, but only as needed to keep the export power below the limit. Normally single phase properties can have up to 5 kilowatts of solar inverter capacity and 3 phase properties can have 15 kilowatts. 306 0 obj <> endobj Victoria's "Hotest" Solar Postcode is 3977 at last look. So if your home isnt currently drawing power you wont know from looking at the display if its capable of producing the maximum 5 kilowatts or if it cant provide more than 3 kilowatts. Fronius Wattpilot: A Smart EV Charger With A Short Warranty, You Wont Believe How Dumb The NSW Governments New Battery Calculator Is. 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. Typically in the Powercor area, the export limit is 5kW of exports for each single-phase household solar PV system. Allows installation but has a zero export limit. 207 Assume positive intention.4. Ronald was born more years ago than he can remember. Why my Power Limit is set to ON with the % whereas her Power Limit is set to OFF and she has been exporting. 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. Youll also start receiving the SolarQuotes weekly newsletter, keeping you up to date on all the latest developments on Australias solar scene. 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. 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. 0000010080 00000 n Enter your postcode now. People have done it at fairly low cost with second hand panels and a DC pump.) 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. I have a 5kw solar system plus a Tesla powerwall 2 on my house . xref "Some of these customers may have received approval to export since, due to network improvements made since their connection." In an Enphase system, that is with the Envoy-S with consumption monitoring. Whats the logical and practical way forward? Hi Everyone, Im on a swer line in rural south Australia. 5kW export limiter imposed on one inverter. 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. Store it and use it later (this requires solar battery storage), or it disappears into thin air via a heat sink. Can one have micro-inverter panels without a gateway, and how would that be limited? I had applications rejected, and when I asked there was NO course for negotiation or discussion its the RULES is s synopsis of the responses. I have just had a 6.6kw system installed with a Fronius 5kw inverter and am export limited to 3kw. 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.

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