# My first 3-Phase on Grid ESS and Backup 30kW **URL:** \ **Category:** Show us your system\ **Tags:** 3-phase, pv\_inverter, beginner, cerbo\_gx, multiplus-ii, ess\ **Created:** [14 February 2025 18:56 UTC](https://community.victronenergy.com/t/my-first-3-phase-on-grid-ess-and-backup-30kw/22240 "2025-02-14T18:56:03Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Teubeli](https://avatars.discourse-cdn.com/v4/letter/t/977dab/32.png) [@Teubeli](https://community.victronenergy.com/u/Teubeli)\ **Post date:** [14 February 2025 18:56 UTC](https://community.victronenergy.com/t/my-first-3-phase-on-grid-ess-and-backup-30kw/22240/1 "2025-02-14T18:56:03Z")
My System is almost finished. I only have to connect the 5x16mm2 cable to the GRID and then start the system up. However I could not wait until then to show it. 🙂 So here it comes: 28.8kWp panels (East/West Roof) 30 KW Batteries 2x Fronius Inverter AC coupled (10.0 and 12.5) 3x Phase MultiPlus II 48/8000 6x Pytes V5Alpha Batteries 4x Lynx PowerIn 1x Cerbo GX MKII 1x VM-3P75CT With the 3 Switches, I can switch: - Grid or Generator Source (only in absolute Emergency) - Grid Bypass or ESS System (For Maintenance of the ESS) - AC2 Loads to AC1 (Full Backup of entire House including Water and Heating system) And here some pictures… ![IMG_2467](https://europe1.discourse-cdn.com/victron/original/3X/e/7/e71df07d3bde43d9a06cf0f9c984cb2e6029089f.jpeg) ![IMG_2468](https://europe1.discourse-cdn.com/victron/original/3X/8/c/8c658eb6c26906be5696d8c4b3e5517fd94ddc10.jpeg) ![IMG_2469](https://europe1.discourse-cdn.com/victron/original/3X/3/b/3be6566b108154ebdc649fd1a8dfa96f05d125da.jpeg) ![IMG_2470](https://europe1.discourse-cdn.com/victron/original/3X/1/2/12d66330d636e45644246200e758552e705f9691.jpeg) And this was the initial plan: ![Schema Mülichram_v3](https://europe1.discourse-cdn.com/victron/original/3X/6/5/656cc5d7db465364220a75685f8415953c102402.jpeg) ---
**Author:** ![jee](https://avatars.discourse-cdn.com/v4/letter/j/a587f6/32.png) [@jee](https://community.victronenergy.com/u/jee)\ **Post date:** [20 February 2025 16:47 UTC](https://community.victronenergy.com/t/my-first-3-phase-on-grid-ess-and-backup-30kw/22240/2 "2025-02-20T16:47:17Z")
So you are not using full potential of your panels in full sun, because you are limited by the charging capacities of the mp2? ---
**Author:** ![Teubeli](https://avatars.discourse-cdn.com/v4/letter/t/977dab/32.png) [@Teubeli](https://community.victronenergy.com/u/Teubeli)\ **Post date:** [20 February 2025 21:53 UTC](https://community.victronenergy.com/t/my-first-3-phase-on-grid-ess-and-backup-30kw/22240/3 "2025-02-20T21:53:27Z")
Actually nope. As the PV panels are on East/West direction, only half of them are fully generating at a given time. So peak performance is at ~19.5 kW Th mP can handle 15,8 charging and some consumption is aleays there… Short Peak… ![IMG_2497](https://europe1.discourse-cdn.com/victron/original/3X/a/c/ac4fe6e632c0ba8605f68008440083c0d2dc5e76.png) But regularly it is rather like this… ![IMG_2498](https://europe1.discourse-cdn.com/victron/original/3X/0/b/0b6ad5952a355c4b833bb1b52dd6eb434105124b.png)