One PWM Solar Regulator / Charge Controller, many volatge: 12V, 24V, 36V & 48V

Ok, so I have been getting into the energy market the last couple of months and desided to start of with something simple: a PWM solar regulator. BUT I always strive to simplify designs, make new designs and/or make designs more cost effective to manufacture. The most commonly used nominal voltage systems for solar power systems using batteries are 12V, 24V and 48V. However here in South Africa there are a couple of systems running 36V. So the challenge was to get one design that could catter for all nominal volatges: 12V, 24V, 36V and 48V. Each of these have differnt start/end of charge and load connect/disconnect limits as can be seen here. One of the biggest brain wraps was to overcome heat dissipation due to resistance of the tracks and components caring currents of up to 30A (like in the case of the WRND WSR30A). In part a combination of thicker copper clad used for the PCBs and careful component sellection helped alot. Still, having a unit run at 48V and 30A will cause it to heat up so any saving will help. For this reason the 30A unit is reenforced with copper wire. As can be seen here:

Another issue due to heat was the heat dissipation in the linear regulator supplying the mcu and other drive electronics with power. If a 48V system is fully charged it is close to 60V. 15mA at 60V gives: .015 x 60 = 0.9W - this is to much given that the temperature in side the unit will be somewhat higher than the outside temperature. A very unique design using discreet components solved this problem. Enjoy, and if you have any other questions please visit my website www.WRND.co.za first or ask below.

400W Jounzer Amp Module

Have a look at my website and tell me what you think about this design.

Ampliozone: Coldamp Plans to Offer 750W Class-D Amp Module

400W Jounzer Amp Module

Ampliozone: Coldamp Plans to Offer 750W Class-D Amp Module

400W Jounzer Amp Module

New class-AB amplifier layout - Jounzer Module

How nice is this new amplifier design: Jounzer Amp

This amp module was designed to help speed-up the installation process when used as a sub-assembly. It takes just one screw to mount the module and all eight power mosfts. The amplifier was also designed with simplicity in mind to lessen noise introduces due to many unnecessary components. Go check it out for yourself: Jounzer Amp