![]() ![]() If the grid goes down you need to keep 230V on all three-phases to stop the solar inverter shutting down. The solar inverter is throttled using frequency shifting if there is ever more solar power than the house and battery can handle.īut if you add a battery to a system with a three-phase solar inverter it is more complicated. The solar panels continue to send power to the house and battery. When the grid goes down in this configuration the battery system isolates the house from the grid (islands) and keeps 230V on the ‘black’ phase so the solar inverter does not shut down. If you have a three-phase home with a single-phase solar inverter (or microinverters) then, with the right battery – such as a Powerwall 2 – Apocalypse Proof Backup is easy and can be done out of the box:Ī single-phase solar inverter and an AC coupled battery. Why a 3-phase solar inverter makes Apocalypse Proof Backup very expensive. If you are careful with your consumption, you can carry on indefinitely charging the batteries with the sun by day and using the battery at night. But if the sun is shining the solar panels help power your home and recharge the battery too. My definition of Apocalypse Proof Battery Backup : when the grid goes down your battery system powers some specially selected ‘essential circuits’. In this configuration, the solar panels cannot charge your battery without the grid. If the battery gets drained during the blackout, your home will black out too. My definition of regular battery backup is this: when the grid goes down your battery system powers some specially selected ‘essential circuits’. Three-phase solar inverters do make it much more expensive to have ‘Apocalypse Proof Battery Backup™’. There is one downside to using a three-phase inverter other than the extra cost (expect to pay $300 to $500 more compared to a single-phase inverter). Why? Because it drastically reduces the chance of having voltage rise issues. If you have a three-phase supply I recommend getting a three-phase solar inverter. So to reiterate for the blog post skimmers: I go in to detail on the causes and solutions for voltage rise issues here. Voltage rise related solar issues are one of the biggest problems we see with installed solar power systems. That means more solar power production with our high-voltage plagued Australian grid. You’ll be increasing the local grid voltage less than a single-phase install and you’ll have less throttling or tripping off due to over-voltage issues. Spreading the inverter capacity across the three wires coming into your home means that you don’t have to push the solar energy as hard to get it out to the grid. Why do you recommend a three-phase inverter? It will not affect how you are billed for exports or how much solar energy is self consumed.īut, I still recommend a three-phase solar inverter. If you have three-phase supply you can have either:Īny of these choices are valid. What are your options if you have a three-phase supply and want solar power? The meter isolator on a three-phase switchboard. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |