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. But you probably would not recover the cost of the battery within its lifetime. Can anyone shed any light for me? Aside from that, when you have high resistance lines, there is a voltage drop over their length. 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. The solar PV system is connected to the network via an inverter. 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. 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. 0000010603 00000 n
Ronald was born more years ago than he can remember. They did say that with future upgrades we could reapply, but I cant find a way to do this. 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). Thus if my system is at maximum output, and I am using 2kW, only 3 kW is being exported to the grid. 306 0 obj
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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). 0000004059 00000 n
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And yes 5kW export limit applies May I suggest an extra fact check to polish the valuable story above? 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 did get on the FiT in the early days for the 66cpkWh, but installed a separate system (which I have since incorporated into my stand-alone system. startxref
Ronald Efficiency has and will improve further over time, but never to the point of perpetuity. (Although they will also allow an additional 5 kilowatts of battery inverter capacity.) ), 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? The fact is that Powercor does not set an upper limit on the size solar panel system you can install, up to 30kW. 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. Any ideas of how I can get a system that is actually going to generate enough power to charge a battery? The majority of customers are approved for the export level they request. I could not convince him that I knew what I was talking about! 4. But youll need to be confident you wont be hit with high demand charges during the evening peak that will wipe out any advantage. Queenslands Ergon network area: All of Queensland on the main grid outside of South East Queensland. I have divided Australias regions into three categories: The information below assumes the property is on the main grid. But there will often be times when the solar system will produce more power than can be exported, so some energy will be lost3. Ready for some quotes? 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. I have just had a 6.6kw system installed with a Fronius 5kw inverter and am export limited to 3kw. I guess it would be technically possible to have a solar system with a battery but still be connected to the grid as backup. "Some of these customers may have received approval to export since, due to network improvements made since their connection." About 50%. Plus a Tesla Powerwall 2. 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. 0000093063 00000 n
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Interesting article. For example, if you are export limited, only the Envoy-S with consumption monitoring can provide this. 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. I realise that Australian legislatures do not care about the future, but, the future is coming, whether the legislatures like it or not. Residential properties are unlikely to be allowed to use export limiting to install even larger inverters. Ready for some quotes? Sorry Andrew: NQR. Hi sonnenBatterie Evo. 0000001260 00000 n
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. If so, it would make replacing the whole system more viable which is exactly what I wanted to avoid (and such a waste!). 0000038030 00000 n
100% At times MPPT1 is at 600 odd watts while MPPT2 is at 2500 odd watts. Please stay on topic. Please stay on topic. 0000037497 00000 n
I have a 10kw Solar Edge inverter limited to 5kw. See image at http://www.johnrogers.com.au/battery_charging_noon.jpg, CORRECTION: My 13.25 kW system will not go above the 10 kW inverter limit unless my house battery is charging and then it can go to 13.25 kW. Where do I find information on reapplying for export with Powercor? 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? We want to add a battery and it seems logical to add more cells also to another inverter/battery setup. 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) 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. And Set Power Limit to 100%. Instead the home can benefit from a small system, as I explain here: Ah yes I see. This certainly goes well beyond initial configuration and reporting. ) MPPT2 always shows better performance than MPPT, usually quite significantly better. If a home cant export any power at all then there is no financial reason to install a large solar system. Powercor will respond in one of three ways: Approve the size system you've requested Limit the amount of power you can export to the grid (e.g. 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. 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. But whether or not extra solar capacity will pay for itself is another matter. Thats a huge jump and even a smidge higher than the Powercor network wide average of 89%. See image at http://www.johnrogers.com.au/battery_charging_noon.jpg. The MSO helps us manage and keep our network safe for solar customers. 0000006578 00000 n
But it took him about another ten years to focus on it in a way that wasnt really stupid, Good Article. hooked up to an energy efficient 44kW motor for a real-world An Update: I just had system installed 4 days ago in the Energex DNSP and suggest the above is perhaps not quite correct. 240 Its also worth taking a look in case you shied away from installing solar panels in the past because of the situation now might be the time to revisit the idea. SAPN has told me I cant have more than a 5 kw inverter , but thats just not enough. going back into the grid with no batteries. An option is to take your pumps off-grid and run them independently off a separate off-grid solar system. I think it is illegal in WA to rewire your inverter or modify any parameters, as it may result in more than 5kW being sent to the grid, so I will just bite the bullet and see that I use as much solar as possible. That is correct. 0000039096 00000 n
I have noticed that one string seems to be performing well under the performance of the slightly smaller string. And doing so potentially puts you running in a non compliant state. It would definitely be better if we didnt need to limit the amount of power solar systems sent into the grid. Many Australian homes are not allowed to export more than 5 kW to the grid. Normally single phase properties can have up to 5 kilowatts of solar inverter capacity and 3 phase properties can have 15 kilowatts. 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. 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. I will update the article with the information. 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! 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. Good question Tony. 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? 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. 0000029011 00000 n
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? Notify me of follow-up comments by email. Please make sure you engage early with our team through eConnect to check on network capacity for your customers. There are versions without this consumption monitoring (old Non -s version of Envoy and even the Envoy-S without consumption monitoring). The new home didnt have solar. 0% 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. My guess is that when the Envoy-S sees it needs to throttle due to export limits, it does this by sending the same instruction to all micros to throttle the same amount (but dont know for sure). <]/Prev 115522/XRefStm 1575>>
I was told that as there is an export limit of 5kW and I already have 3.5kW system, my new system will be export limited to 1.5kW. 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. This extra meter adds to the cost of a solar system. All is explained here: http://www.solarquotes.com.au/blog/kw-and-kwh-what-is-the-difference/, ( 5kW per hour is a non-sensical unit unless you want to describe an acceleration of energy! Why on earth would I do that if I can help it. Of course the manufacturers dont want this to be public knowledge and pretend that once you paid for a system you are set for life (yours, not that of the system). 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? 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. Does anyone know how the limiter works in this scenario with 2 inverters? In reality, the losses will be considerably less. Finally! 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. 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. trailer
If you cant store the power (too expensive) and you cant export it, why the requirement (or desire) to put in large systems? Do you know the situation here? As per current standards, a single phase premises is limited to 10kW generation and 5kW export. 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. But there is also the DNSP rules which need to be followed. you aren't allowed to export any power from your solar system to the grid. Voltage (V) measured at inverter terminals at night or not enough at day time ? We just had a 30kW inverter solar install for our business and it has been limited to 1.8kW export. 2. Youll also start receiving the SolarQuotes weekly newsletter, keeping you up to date on all the latest developments on Australias solar scene. 0
The standard relating to solar inverters is about to change. Will this mean any additional system would be limited to 0kW output?? 2. 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. 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. So basically the whole local industry is going to be cactus until this is resolved. Enter your postcode now. 0000038752 00000 n
Surely the distributors capping what you can export to the grid is a bad thing? So having a powerwall is way less useful for helping with an export limit than you would think. Thanks Steve 0418 815 193. 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. 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? Great article and content on this website But depending on our network capacity, export constraints may influence the size of the unit they install. 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. 207 This is disappointing as this would be an easy option to implement. We have a 3kwh system and are really using as much during the day as we can. Powercor is telling increasing numbers of households looking to install new systems in this area they will have a zero export limit. Tasmania: Under 1% of Tasmanians are on SWER lines, so the generous export limit should often be available. Certainly this dumb meter is not capable of sending current from the inverter selectively to my home circuits and any excess to the grid? I suspect that it is likely, that that they are all signaled equally, not in truth I dont know for sure. 0000028638 00000 n
Im afraid in a typical situation the inverter wont show its potential output. 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. 0000038830 00000 n
I have a 5kw solar system plus a Tesla powerwall 2 on my house . It is possible to max out the 10 kW inverter capacity with my Tesla, house load and Heat Pump hot water. The installer has been able to get the system through WP in the past as the inverter can limit the export to grid to 3kva. No active system controls whether you use inverter of imported power. endstream
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<. This means you tend to see panels at the end of strings shutdown soonest on voltage risk conditions, as they have the highest voltage rise being at the end of the string. 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? 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. Website link shows system producing well over 10 kW. Can one have micro-inverter panels without a gateway, and how would that be limited? 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. 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. Powercor is the Distributed Network Service Provider for central and western Victoria, as well as Melbournes western suburbs. Powercor's technical assessment aims for these works to enable at least 80% of new solar applications to export 5 kW. 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. Allows installation but has an export limit. This could be important, given that we have a state parliamentary election due in a couple of months. But I can tell you a few things that might help with some of your pondering :- 1. Please keep the SolarQuotes blog constructive and useful with these 5 rules: 1. 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. These consumption spikes go past the Solar energy being limited suggesting were drawing from the grid! 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. 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 . 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. It does this by adjusting the MPPT but instead of working to maximize power from the panels it reduces it. 0000037952 00000 n
Thank you. The solar installer or customer must have sought and received pre-approval from us for the requested capacity of the generator. Sorry if dumb question. Now, that would help protect electricity grids, especially, the fragile, decrepit SWIS grid, for the present.
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