Menno
Member
- Joined
- Aug 24, 2017
- Messages
- 52
This project started end 2017 and only a few things where know.
1. Build with 18650 cells which I salvage from broken packs.
2. Aim for 2 times my highest measured daily use, which is 48 KWh. This means a target pack of 100KWh, as the future also will have an Electric car and Motorbike planned.
In the past years some basics are came up.
3. Max load for my house is estimated between 10 and 15 Kw.
4. I do not want to ballast the batteries more than 0.5C. This means I need at least 30 KWh before I start connecting to the net.
5. Battery packs will be 14S80P which makes an average of 5 KWh per pack. They are with electronics about 30 Kg and that is easier to handle and replace. Pack size is 560mm*400mm*<70mm. The ideas is to place them on the long side.
The first 5 Kw is packed, other are underway, See picture. The pack on the back is a 7S160P. This was my practice pack and I used cells that are not deemed right (low capacity or less than 90% of original capacity) for my Powerwall and is used for charging my E-Bikes. Currently I have >14 KWh packed. This is without a couple of smaller packs and the 7S160P Which I builded to test idea's. I have a steady stream of batteries coming in and currently have tested or are in testing another about 6 KWh on cells and more to come early next years. The expectation s that I will start hooking up somewhere end 2019.
I am not sure with what kind of BMS I will start working and what kind and size invertor I am going to use. I was thinking a Hybrid inverter, any advice is welcome.
1. Build with 18650 cells which I salvage from broken packs.
2. Aim for 2 times my highest measured daily use, which is 48 KWh. This means a target pack of 100KWh, as the future also will have an Electric car and Motorbike planned.
In the past years some basics are came up.
3. Max load for my house is estimated between 10 and 15 Kw.
4. I do not want to ballast the batteries more than 0.5C. This means I need at least 30 KWh before I start connecting to the net.
5. Battery packs will be 14S80P which makes an average of 5 KWh per pack. They are with electronics about 30 Kg and that is easier to handle and replace. Pack size is 560mm*400mm*<70mm. The ideas is to place them on the long side.
The first 5 Kw is packed, other are underway, See picture. The pack on the back is a 7S160P. This was my practice pack and I used cells that are not deemed right (low capacity or less than 90% of original capacity) for my Powerwall and is used for charging my E-Bikes. Currently I have >14 KWh packed. This is without a couple of smaller packs and the 7S160P Which I builded to test idea's. I have a steady stream of batteries coming in and currently have tested or are in testing another about 6 KWh on cells and more to come early next years. The expectation s that I will start hooking up somewhere end 2019.
I am not sure with what kind of BMS I will start working and what kind and size invertor I am going to use. I was thinking a Hybrid inverter, any advice is welcome.