by RegGuheert (Posted Sun, 28 Apr 2013 06:47:50 GMT)
I'll say it again: The Classic Controller is a single DC-DC converter with the PV array at its input and the battery at its output. This DC-DC converter charges the battery under the control of a microprocessor. The voltage ratio between the input and output dictates where on the PV curve the Classic Controller operates. When the battery is in the bulk charging regime, it tracks the PV's maximum power point. When the battery is in CV or float modes, it tracks at voltages above the MPP to find the proper power level to regulate the battery voltage.
AndyH wrote:
Nope. Look at the information I've already provided. I've familiar with the way two devices work and they're very similar. There is an MPPT block that keeps the panel loaded at it's max power point, there's a battery charger that provides the three stages (CC, CV, and float) for lead acid battery charging, and there's a DC-DC in between that bridges the gap between the MPPT and charger.
I'm sorry, Andy, but that is very far off of any realistic approach to any MPPT controller. If you try to design and build such as system, you will understand that your approach is not just extremely costly and inefficient, it will result in the need to dissipate kilowatts of power that are best left in the array.I'll say it again: The Classic Controller is a single DC-DC converter with the PV array at its input and the battery at its output. This DC-DC converter charges the battery under the control of a microprocessor. The voltage ratio between the input and output dictates where on the PV curve the Classic Controller operates. When the battery is in the bulk charging regime, it tracks the PV's maximum power point. When the battery is in CV or float modes, it tracks at voltages above the MPP to find the proper power level to regulate the battery voltage.