Your dedicated meter will inform the inverter, and it will immediately reduce the power, so it doesnt exceed 5 kilowatts1. Our Solar & Battery Calculator can give an idea of if its likely to pay: https://www.solarquotes.com.au/solar-calculator/. As batteries currently operate they charge from power in the morning that could otherwise be sold rather than from power that may not be able to be sold in the middle of the day. 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. . Can anyone shed any light for me? The MSO helps us manage and keep our network safe for solar customers. 0000001575 00000 n 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. 0000038830 00000 n hour of charging is enough to drive 35km.. Im in regional WA with a rural 2 phase supply. 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. Allows installation but has an export limit. 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? A condition of this basic connection offer is that all inverter energy systems must have the volt-watt and volt-var response modes enabled with the following settings: Ronald was born more years ago than he can remember. 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. 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. My solar installer applied to Powercor to install a 5.4kw system at my Point Cook address. How do I get around this with SAPN , am I allowed to export limit on a swer line in Sth Aust. 0000004622 00000 n I want about 10Kw of panels so I can run pumps etc. ( After all, Im a big picture kind of guy. 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). 0000039284 00000 n The solar installer or customer must have sought and received pre-approval from us for the requested capacity of the generator. Enter your postcode now. (Image from Finns Tesla App). But you may as well just get a standard inverter and send your excess electricity into the grid. For any amount above the daily export, you will receive our standard retailer feed-in tariff of 5 . Victorias AusNet network area: The eastern third of Victoria, not including Melbourne or French Island. 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. 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. So you may decide adding a second system is worthwhile, or you may want to put it off until your current system develops problems and replace it with one large new system. Its located in Ausnet Services' Distribution Area but Ausnet is not part of the CitiPower, Powercor and UnitedEnergy . This gives the advantage of having a new system covered by a new set of warranties. Notify me of follow-up comments by email. 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. Thats a huge jump and even a smidge higher than the Powercor network wide average of 89%. About CitiPower and Powercor FACT SHEET: SOLAR EXPORT APPROVAL Set appliances to use your solar power Maintenance and safety checks are important People have done it at fairly low cost with second hand panels and a DC pump.) Australian network service providers (including CitiPower) use solar export limits to keep voltage levels in transmission lines operating within safe . 0000029403 00000 n at night or not enough at day time ? 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. I believe it must have been set up during installation, but the installer company claims that this is handled by Growatt themselves. 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. 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? The majority of customers are approved for the export level they request. I also dont know if my meter has limiting but suspect not as it is a pretty dumb device. 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. 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. 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. 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. The loss figures above are for Sydney and are affected by the climate. It would definitely be better if we didnt need to limit the amount of power solar systems sent into the grid. If a home cant export any power at all then there is no financial reason to install a large solar system. If you are using Enphase microinverters which is extremely likely the whole system can be export limited using the Enphase Envoy gateway. 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. We installed 4.5kw with a 5kw inverter in 2014. So-called wasting of the extra electricity produced is irrelevant: sunlight is FREE, and whether I use it or not has no bearing on the environment. 0 0000007057 00000 n reliable export limit control function as per AS4777.2 to limit the export output where the . 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. 60% lagging Single-phase properties can have up to 5 kilowatts of inverter capacity, and 3 phase properties can have up to 30 kilowatts. just wondering if anybody can shed some light on the following, 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. 100% I have noticed that one string seems to be performing well under the performance of the slightly smaller string. 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 realise that Australian legislatures do not care about the future, but, the future is coming, whether the legislatures like it or not. But you probably would not recover the cost of the battery within its lifetime. We respect your privacy and you can opt out from the newsletter at any time. 0000008571 00000 n 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. Yes I do have Enphase micro-inverters and an Envoy gateway, though not enough sunny roof to exceed 5kW, so my interest is rather academic but real. 2. Many Australian homes are not allowed to export more than 5 kW to the grid. 0000038752 00000 n 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). 1. 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. 0000038562 00000 n This is often referred to as 'network constraints'. Under another option to . For example, our Solar Enablement program is intended to allow more customers to connect a 5kVa solar PV system with export capacity. Do you know the situation here? The solar PV system is connected to the network via an inverter. If your pumping needs are large enough this can pay for itself, but it will be expensive to set up. In reality, the losses will be considerably less. Real names are preferred - you should be happy to put your name to your comments.2. 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. 0% Sorry Andrew: NQR. Rooftop solar works by turning sunlight into electric power. Because people have been refused any STCs for being just a few watts over, no installer will go over the limit for a normal installation. 220 No unfortunately. The inverter reduces the amount of electrical energy supplied by the solar panels. 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. 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. A Decent Battery From sonnen. But I can tell you a few things that might help with some of your pondering :- 1. 0000010603 00000 n 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 standard relating to solar inverters is about to change. I am afraid Western Power is very strict. xref The distributor deals with that by putting the voltage slightly up at the sending end. While this is fine during the week when we are open, it seems a huge waste of electricity on the weekends when we are closed. 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. 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. Very true AL0126. 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. When a home is exported limited, all the power the solar inverter can produce is available for the home to use. 0000093063 00000 n 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). 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. 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. Is this correct? Fronius Wattpilot: A Smart EV Charger With A Short Warranty, You Wont Believe How Dumb The NSW Governments New Battery Calculator Is. 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. 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, Powercors new solar connections export approval rate of just over 60% at the start of the year has increased to above 90%. Please stay on topic. It does this by adjusting the MPPT but instead of working to maximize power from the panels it reduces it. I am on my second Tesla EV and the new one has a rage of 700km if youre not a lead foot. 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? Perhaps it is worth mentioning that the stricter export limitation becomes, it will make a stronger argument for batteries. The solar installer or customer must have sought and received pre-approval from us for the requested capacity of the generator. There are lots of variations to this theme, however. And doing so potentially puts you running in a non compliant state. NSWs Essential Energy area: Regional NSW. 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. We want to add a battery and it seems logical to add more cells also to another inverter/battery setup. 253 Economically this probably Is not viable, as our electricity bill is fairly low. Normally it makes more sense to buy a second, separate system, than to expand an existing one. Only residential homes with inverters of 5 kilowatts or less can receive the states. ARTICLE WRITES: Queenslands Energex area: South East Queensland. Can one have micro-inverter panels without a gateway, and how would that be limited? When a home is exported limited, all the power the solar inverter can produce is available for the home to use. 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. 207 DC Input Power (Wp) 10000, from its published datasheet. Put down your weapons.3. I could not convince him that I knew what I was talking about! 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. A small solar system can be financially viable. 0000009027 00000 n Just last week, Powercor (Western Victoria) advised that they now have more room in the grid for export. They did say that with future upgrades we could reapply, but I cant find a way to do this. What I find is installers dont seem to like it when I tell them my plan. Heres what that means. 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 ?.) I think is is utter madness that the VIC government is handing out generous rebates of $1850.00 and 4 year interest free loans of up to $1850.00 and Powercor has zero feed in capacity for excess solar power. Note that connections off the main grid are usually far more restricted. 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. This extra meter adds to the cost of a solar system. 0000009573 00000 n There is not likely to be an Enphase system without a gateway (called the Envoy with in the Enphase system), because this is needed to setup the system, configure its profiles and report production and other important functions of the system. Also note that for new installations in WA, only residences with inverters of 5 kilowatts or less can receive the states, Western Australias Western Power area: Perth and South West WA. Even then, the losses from the limit are minor. We have had solar for 6 years and just recently moved homes.
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