Comparing MPPT vs. PWM Chargers for Li-ion Batteries

Maximum power point tracking (MPPT) and pulse-width modulation (PWM) chargers are both commonly used to charge lithium-ion (Li-ion) batteries. However, there are several differences between the two technologies that make one more suitable for certain applications than the other.

Efficiency

MPPT chargers are more efficient than PWM chargers. MPPT chargers use a tracking algorithm to find the maximum power point of the solar panel, which is the point at which the panel is producing the most power. PWM chargers, on the other hand, simply apply a fixed voltage to the battery, which can result in the battery not being fully charged or being overcharged.

Cost

MPPT chargers are more expensive than PWM chargers. The tracking algorithm used in MPPT chargers requires more complex circuitry, which drives up the cost. PWM chargers, on the other hand, are relatively simple and inexpensive to manufacture.

Size

MPPT chargers are larger than PWM chargers. The tracking algorithm used in MPPT chargers requires additional circuitry, which makes the chargers larger. PWM chargers, on the other hand, are relatively small and compact.

Weight

MPPT chargers are heavier than PWM chargers. The tracking algorithm used in MPPT chargers requires additional components, which adds to the weight of the chargers. PWM chargers, on the other hand, are relatively light and portable.

Conclusion

MPPT chargers are more efficient and offer more features than PWM chargers. However, they are also more expensive, larger, heavier, and more complex. PWM chargers are less efficient and offer fewer features, but they are also less expensive, smaller, lighter, and simpler. The best charger for a particular application will depend on the specific needs of the user.