2x Hager-ESS Switches to enabling switching the Grid-feed directly to the sources or via the ESS system
70mm2 Accu cables
Blue Systems DC-Switches to sepperate the Accu-Packs from the DC-Distribution system. Selected these as they can handle continue 350A at 48V and 600A at 48V for 5 minutes.
I would like to thank my Son for the guidance in this project
Hello @PieterD
welcome to our community. Very interesting setup.
I would right have two questions regarding your system:
To be honest, I never thought about buying case and cells separately to build my battery. Instead I just bought stock US5000 Would you mind sharing your motivation to go down that road?
Your Hager ESS-Switches sound interesting. Can you share the model and maybe a picture? What makes such a switch an ESS switch?
I have choosen for buying the cells and case incl. BMS and Balancer sepperatly to safe on shiping cost. The cells where availble for a very good price here in the Netherlands and the Seplos cases were on stock in Poland. As both came in larger quantities from China this saved me a lot of transport cost and the price was based on DDP. So no hassle with custom duties, transport cost, etc.
Concerning the Hager Switch this is the HAGER SFT440 - 1-0-2 quadapolaire 40A-switch. The bust you buy them via Amazon. They are very cost effective there. This switch has three possitions: 1 - Off - 2 suited for switching L1-L2-L3-N at 40A.
Maximum respect, @PieterD . I thought, I’m adventures to build a Victron DIY DESS on my own Just watched the video, what it means to build a Victron System like yours with a DIY battery pack on top. Awesome. Thanks for sharing and for the additional details.
Also. May I ask you how you wired that Hager to your mains grid supply? Are you using one kabel to connect it to the grid, and have one to AC-IN and the other to AC-OUT-1 or what?
I wired these with separate cables as I used different wire diameters. 5x 6mm2 from the grid to the Multiplus’s AC-IN secured with 3x 25A Earth leakage Circuit breaker, 5x 10mm2 AC-OUT-1 to the users secured with 3x 50A Circuit Breaker. I needed these cable capacity due to the required length and to prevent less then 2,5% voltage drop. The whole system is installed in my garage next to my house. The 10mm2 return feed to the users also enables me to use in the future powerassist.
Using one cable is allowed here in the Netherlands as far as I know but watch out to share the Null with AC-IN and AC-OUT. They must be separately connected.
Yeah the voltage drop can be quite annoying. I only have two 5x2.5mm2 YMVK cables at home, since we are limited to 16A (3x25A mains) and the cable length is short. Like only 5 meter. I fused it with a C16 RCBO.
I would have loved to use 4 or 6mm2 but the builder made a mistake, and poured them in concrete. Then the hardwood floor went over it so there is no way of pulling new cabled. Hopefully not a problem for the MPII 48/5000’s or else
Would you mind sharing your motivation to go down that road?
Just watched the 