Whilst this may not be technically defined as export limiting, as the inverter specifications, specify that the inverter, whilst allowing up to an overload factor of 2, will only generate up to 5kW of A/C power Enter your postcode now. First read the section How Export Limiting Works at the top of this thread. 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. But if you suddenly switch off everything, there is more surplus solar power than youre allowed to export. Theres more good news, with further improvements to come. Why on earth would I do that if I can help it. Most systems have mostly N facing panels, so really only generate peak power for a few hours a day (often 10am>2pm approx) The MSO helps us manage and keep our network safe for solar customers. Im surprised this hasnt hit the mainstream media yet. To add to this, in the installer section of the Envoys web server control panel, you can set the profile by which all microinverters operate. About 50%. 0000028229 00000 n Rooftop solar | CitiPower & Powercor %PDF-1.4 % just wondering if anybody can shed some light on the following, Can one have micro-inverter panels without a gateway, and how would that be limited? If at any moment in time you are generating more solar electricity than you need, the excess is exported to the grid. The standard relating to solar inverters is about to change. That can raise the voltage to a level dangerous to appliances. The reason for this query, is that, in the past, my understanding has been that, in WA, where export limiting is apparently, banned by the gratuitously oppressive state parliament, and, where a limit of a 5kW output inverter, is allowed, for a single phase grid connection on the SWIS grid, a limit of 6.66 kW of panels generating capacity, is imposed for single phase connections to the SWIS grid, and, thence, the limit of panels generating capacity, to which the federal solar panels rebate applies, for such a connection, has been the 6.66kW. 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. 253 We have a 3kwh system and are really using as much during the day as we can. The good news is, even in a worst-case situation, the amount will be fairly minor. 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. 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. I am a total newbie to this but I am unclear why export limiting is good? 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). 0000029403 00000 n Export limiting generally isnt permitted. I have spoken to one installer , but he couldnt really help me . Powercor's technical assessment aims for these works to enable at least 80% of new solar applications to export 5 kW. 0000006578 00000 n 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. But you will probably find that there is another setting that it will shutdown when 10 minute average voltage is a measly 255v. 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? Select the AS/NZS 4777.2:2020 Australia A setting. I think of it like the rate at which water is flowing out of a hose. See image at http://www.johnrogers.com.au/battery_charging_noon.jpg. Has the oppressive authority in WA ever given a reason for not allowing export limited inverters in WA? This extra meter adds to the cost of a solar system. Sometimes Powercor can reduce that to a lower figure, or even set a zero-export limit. I wouldnt drive anything else. Ill upgrade the Endeavour Energy area from Ugly to Bad, since things are clearly not all bad there. In future, will powercor allow export limit if they upgrade transformer? Great article and content on this website But there is also the DNSP rules which need to be followed. 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 youll need to be confident you wont be hit with high demand charges during the evening peak that will wipe out any advantage. 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. 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. Theyd be higher for a sunnier location such as Perth and lower for cloudier places such as Melbourne or Hobart. The earth is used as one conductor which has a higher resistance than a copper wire. I know in the movie the Bad was worse than the Ugly, but thats not the way Im doing it. We respect your privacy and you can opt out from the newsletter at any time. 2. What Happens to the Surplus Power That Can't Be Exported to the Grid? is there a inverter that stops power going back (Or at least it will be expensive to set up well. . Solar export limiting, or 'export limiting', occurs most often when there is more power being pushed into the grid than it can handle. 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. 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? 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. 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. The ideal way to measure the power flow in and out of your house would be to ask your existing electricity meter. However they have been advised that this wont be allowed anymore. 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. Of more concern is occasional spikes in consumption which go past the 5kw limit. Select your country/region. Reminder: In Australia, you are allowed to install 33% more panel capacity than the inverter capacity for example, a 10 kW inverter can have up to 13.33 kW of panels attached. Please confirm the maximum export limit in the relevant section of this application.. 0000038830 00000 n 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. Im trying to get some unbiased advice on whether or not we should add more solar. The solar installer or customer must have sought and received pre-approval from us for the requested capacity of the generator. 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. This is because even if there is only a refrigerator running during the day it will reduce the losses from export limiting and if an effort is made to shift electricity consumption to the middle of the day then losses can be mostly or entirely eliminated. But your situation is complicated by already having a 3 kilowatt system. It also allows you to focus on increasing your self consumption which in turn provides a better return on investment. If thats not a good option, you can consider getting a demand tariff and doing pumping outside the peak period when the cost of grid electricity will be relatively low. The majority of customers are approved for the export level they request. In addition, all modern solar inverters must comply with AS4777.2015 at least. 0000007057 00000 n 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. Im in the same situation, except I have an existing 5kW system. How is export limited for micro-inverters? Good question Tony. Solar and renewables for installers / RECs - Jemena We installed 4.5kw with a 5kw inverter in 2014. JackD 1 year ago. Victorias Powercor area: Western Victoria, including a large portion of West Melbourne. 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. Quotes vary and the deal has to be value/advantage logical or whats the point. We have had solar for 6 years and just recently moved homes. Amongst other things, AS4777.2015 has some requirements to shutdown on phase imbalance in a 3 phase setup. Finally! 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, So in effect I have two safety guards in place, 1. the 5kw limiter to the grit and 2. the extra Gateway . But it seems the situation has been changing for the better in the last couple of months in a number of affected areas. (We are conected to a 25Kw transformer, with 5 consumers connected.). House batteries should have the capability of being set to turn off when they are fully charged and then on towards the middle of the day. 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. 0% 0000001916 00000 n 0000037380 00000 n sonnenBatterie Evo. 0000009027 00000 n Below is the email response I received from Powercor. 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. This is sufficient to charge a battery, although larger solar systems generally improve the return from batteries. Even then, the losses from the limit are minor. Im afraid thats a tough situation. Thanks Steve 0418 815 193. 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. given that we are working from home all the time these days. Voltage (V) measured at inverter terminals Your dedicated meter will inform the inverter, and it will immediately reduce the power, so it doesnt exceed 5 kilowatts1. Ronald was born more years ago than he can remember. 0000004059 00000 n 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! amended or replaced from time to time. 0000011077 00000 n 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). you aren't allowed to export any power from your solar system to the grid. 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. What I find is installers dont seem to like it when I tell them my plan. Three-phase homes can install up to 15 kilowatts of inverter capacity or 30 kilowatts with export limiting, except in South East Queensland where special permission is required from Energex to install an export limited inverter over 15 kilowatts. NSWs Endeavour Energy area: Western Sydney. The solar PV system is connected to the network via an inverter. 3. 0000029011 00000 n 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%. Or is there a build up of voltage in the system? 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. at night or not enough at day time ? When it says that you can export 5kw, does that mean you can export up to 5kw PER HOUR? The following is a list of the areas in case youve been missed. Very true AL0126. hbbf`b``3 I j Hi Everyone, All these profiles need to dance carefully around the problem. As far as I know, only solar installers can apply for export capacity in the Powercor area. Some say so you want to replace your system? With permission export limiting can be used to install larger systems. Will this mean any additional system would be limited to 0kW output?? The battery is charging from the DC current which is before the inverter. . hour of charging is enough to drive 35km.. 0000009573 00000 n 0000001260 00000 n Voltage (V) measured at inverter terminals Victorias AusNet network area: The eastern third of Victoria, not including Melbourne or French Island.
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