BlueSolar 100-15 True MPPT solar charge controller

The BlueSolar series of charge controllers are some of the latest and most efficient MPPT controllers available. The BlueSolar 100-15 controller is based on a Freescale MC9S08AC32 40MHz MCU, can handle up to 100V 15A PV installation, hence then model name. This allows up to 400W of PV on a 24V battery setup, which is pretty much for such a relatively small controller.

Specs

• Type: MPPT charge controller with load output
• Micocontroller: Freescale MC9S08AC32 40Mhz MCU
• Max. PV voltage: 100V
• Max. PV current: 15A
• Max. load current: 15A
• Battery voltage: 12V or 24V, auto-detect
• Battery fuse: 20A blade fuse
• Protection: Over-voltage, over-temperature (buck converter), low-battery voltage cut-off, battery management
• Terminals: screw terminals, max. 6mm2/10AWG
• Monitoring: Two LEDs, remote VE Direct communication cable to a computer or meter device
• Auxilary port: JST-PH 4-pin 1mm pitch connector, pinout GND-RX-TX-5V
• Firmware: Upgradable via VE Direct cable and software
• Size: 113.9 x 100.7 x 46.9 mm

Schematic

The following is a partial reverse-engineer of the power stage of the charge controller, no logic or support circuitry is included.