I don't have much experiences from designing and understanding more complex circuits. I only have basic knowledge how different components work and how to create and calculate simple transistor circuits with 4 resistors and a transistor. So I need some help from more experienced people.
I'm working on a 12VDC home automated system, and there is components in the system that needs stabile voltage ~(12V - 12.8V), as long as the generator is active, it delivers 13.8V. But the battery voltage can drop down to 10.5V when I'm not on the site.I have also limited battery capacity, and it can go a week between I'm on place and charge the battery. So I need a effective power supply that can deliver stable voltage. So I have done some search and found that Buck boost converter is what I'm looking for.
Not all equitment is powered on 24/7, but I will install such powersupply for every fuse, so every equitment has same stable voltage. And I have calculated that I need least 15A for the equitment that needs most power. So I'm looking for a buck boost converter that can least deliver 15A@12VDC.
I have done some searches for such curcuit, but the best I have found can deliver 5A@12VDC and 10A@24VDC, is it possible to change these curcuit to deliver 15A+@12VDC? Or does any body has a cicuit that can deliver such current.
The reason why I want to solder the PCB by my self is because I want to have PSU and Control unit for the home automation in the same case. The cases are going to be designed as mini-rack (10 inch).
Here is the circuits that I have found: