One of the simplest methods of controlling a charge is via a regulator. They let the battery voltage climb to a specific level before turning off completely until the voltage lowers back down. A PWM controller is a little more complex. The 30A Solar Charge Controller continuously monitors the battery voltage and adjusts the charging current accordingly.
The closer the battery voltage is to the required level, the shorter the charge bursts are given to the battery. Finally, there is a drawback to this. You are only using around 75% of the power available if your battery voltage is 13.5 V and your PV (solar) module is rated to generate 18 V. Therefore, the most power you can expect to get out of a 12v Dc To 220v Ac Inverter module is 75 W.
An MPPT charger will use the available power within a very close percentage. Put another way, and it will draw all the power from a module and regulate the voltage and current so that the battery gets just what it needs. Many MPPT Charge controllers can handle voltages far higher than those of the battery they are charging. It is possible to raise the voltage while maintaining the same amount of current by connecting numerous modules in series.
Keep in mind that there is a maximum “DC” input voltage for MPPT chargers. The full power point tracking 60AMppt Charge Controller is the most advanced and priciest option. The costs of cables, modules, and racks are reduced, though. I think that was cash well spent.
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