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electrical:solar:pwm_tweaking [2022/10/12 13:30] frater_secessus [PWM's achilles heel] |
electrical:solar:pwm_tweaking [2023/11/19 16:17] frater_secessus [PWM's achilles heel] |
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This affects charging in all three [[electrical: | This affects charging in all three [[electrical: | ||
- | {{ http:// | + | {{ http:// |
- | 17.8v x 5.6A = 99.68w | + | 17.8v x 5.6A = 100w <-- rating under laboratory conditions((the math doesn' |
- | 17.8v x 5.6A = 94.70w <-- MPPT running at 95% efficiency \\ | + | 17.8v x 5.6A = 94.70w <-- MPPT running at 95% efficiency |
+ | |||
+ | PWM harvest | ||
14.8v x 5.6A = 82.88w <-- power at a high Absorption voltage, as with flooded lead acid \\ | 14.8v x 5.6A = 82.88w <-- power at a high Absorption voltage, as with flooded lead acid \\ | ||
14.4v x 5.6A = 80.64w <-- power at a lower Absorption voltage \\ | 14.4v x 5.6A = 80.64w <-- power at a lower Absorption voltage \\ | ||
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12.7v x 5.6A = 70.61W <-- power at 100% state of charge (SoC) \\ | 12.7v x 5.6A = 70.61W <-- power at 100% state of charge (SoC) \\ | ||
12.4v x 5.6A = 69.44W <-- power at 75% state of charge; bulk charging \\ | 12.4v x 5.6A = 69.44W <-- power at 75% state of charge; bulk charging \\ | ||
- | 12.1v x 5.6A = 67.76W <-- power at 50% state of charge; | + | 12.1v x 5.6A = 67.76W <-- power at 50% state of charge; |
+ | 10.0v x 5.6A = 56.00W <-- battery bank accidentally run flat | ||
This last number shows how far off PWM output can fall when battery voltage (Vbatt) is at its lowest.((The last number is also the source of the "30% boost!!!" | This last number shows how far off PWM output can fall when battery voltage (Vbatt) is at its lowest.((The last number is also the source of the "30% boost!!!" |