Difference Between PWM And MPPT Charge Controller
There are two different types of solar charge controllers are PWM and MPPT charging methods to charge batteries from a solar array/panel. Both technologies are widely used in the off-grid solar which used by the efficiently to prevent over changing or over voltage from solar panels. Since panels in solar street lights need to be charged, these solar charge controllers are essential for a long-lasting, best-quality installation.
| SNo. | Basic Term | PWM | MPPT |
| 1. | Full Form | Pulse-Width Modulation (PWM) | Maximum Power PointTracking(MPPT) |
| 2. | Diagram |
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| 3. | Working | Voltage pulled down to Battery Voltage | Incress current and Voltage pulled down to Battery Voltage |
| 4. | Used in | Small Projects, Street Lights | Home,Office,Schools,large industry. |
| 5. | Amps | 10A – 60A | 80A-5KV and More |
| 6. | PV Array voltage | PV Array & battery voltages should Match | PV array voltage can be higher than battery voltage |
| 7. | Battery Voltage Support | 12v 24v | 12v 24v 36v 48v |
| 8. | Off-Grid or on Grid-Tie | Off grid | Ongrid,offgrid & Hybrid |
| 9. | Weather Conditions | Warm and sunny weather Performs best. | Warm,Sunny and cloudy weather Works Also. |
| 10. | Solar Connect | If need 800W then Install 1000W | If need 800W then install 800W or More. |
| 11. | Power Stage | 3 stages Bulk,Absorb and Float. | 3 stages Bulk,Absorb and Float. |
| 12. | Dimension Size | Less | Large |
| 13. | Cost | Cheap | Costly |
| 14. | Price | 1000 to 2000Rs | 4000 to 5000Rs |
| 15. | Efficiency | 70–80% | 94% to 97% for the MPPT conversion |
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