github-mirrors/SMA-SB2500-Off-Grid
1
0
Fork 0
mirror of https://github.com/wvdv2002/SMA-SB2500-Off-Grid.git synced 2025-01-22 18:44:03 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Moved checkout link higher and caption for the block diagram

Browse source
This commit is contained in:
Wouter van der Vinne 2022-01-02 14:15:03 +01:00
parent aa83f3e337
commit 967b9586e6
1 changed files with 4 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
README.md
View file

@ -1,9 +1,11 @@
# SMA-SB2500-Off-Grid
The grid tie solar inverter SMA Sunny Boy SB2500 is a beautifully designed transformer isolated grid tie inverter. It is probably possible to convert it to an off grid batter inverter by reprogramming or redesigning the logic board
Checkout my [hackaday.io](https://hackaday.io/project/183357-grid-tie-inverter-sma-sunny-boy-sb2500-openlogic) page for pictures of the inside of the inverter and a project log.
![image](images/blockdiagram.png)
The block diagram from the SB2500 manual.
The inverter has an H-bridge with 4 IGBTs (SKW30NF60) driven by IR2113S mosfet drivers. These drive an 2mH inductor + 4.7uF capacitor step down converter and then a isolation transformer 153V primary/230V secondary 9.6A. On the grid side are three safety relais, EMC filtering and a measurement transformer for the logic board the measure the grid voltages.
All the logic is powered from the DC side, several voltages are generated using a switching power converter which generates all the drive voltages for the IGBT drivers and the logi board.
@ -11,7 +13,7 @@ The logic board contains an SAFC808 microcontroller, probably with an interchang
The layout is drawn in Kicad.
Exported images (probably not up to date) are in the images folder.
Exported kicad images (probably not up to date) are in the images folder.
The src folder can contain the Freescale DSP code.
@ -46,7 +48,4 @@ The datasheets folder contains datasheets of most of the electronic parts in the
Checkout my [hackaday.io](https://hackaday.io/project/183357-grid-tie-inverter-sma-sunny-boy-sb2500-openlogic) page for pictures of the inside of the inverter and a project log.