mppt vs pwm
Hi, A nice little video comparing mppt vs pwm with the batteries in bulk mode. mppt vs pwm
Forum Discussion
12thgenusa,
Understood. I would certainly fit into that camp, as I see watts as a means to an end, not the end itself. Pretty much everything is rated in amps or Ah's; batteries, chargers, controllers, wiring, circuit breakers, etc.; so it just makes more sense to me to think in such terms.
Moreover, a 1080w power supply that puts out a steady 12v, and up to 90a, is useless to me. But a 1080w ps that puts out 83-60a at 13-18v adjustable is what I need. So, again, it's how those watts breakdown that really matters to me, not the watts themselves.
As for comparing mppt to pwm, I fail to see any point in comparing the two in terms of watts? If the mppt is putting out 8a at 14.6v, and the pwm is putting out 7a at 14.6v, that's 116.8w vs. 102.2w, but how do I even begin to relate to how many watts are being delivered at my bank? And what, if any, benefit is there to it? At some point I have to divide the watts by 12v, to get a sense of what has been accomplished. And even that would be inaccurate, seeing as the watts at the bank are not a factor of 12v X amps, but some other voltage(s).
To use eating a meal as an analogy, to me watts is like eating eggs for breakfast, where voltage is the fork and amps are the eggs. All I care about is my belly gets full of nutrition, not what name is applied to the meal.
Understood. I would certainly fit into that camp, as I see watts as a means to an end, not the end itself. Pretty much everything is rated in amps or Ah's; batteries, chargers, controllers, wiring, circuit breakers, etc.; so it just makes more sense to me to think in such terms.
Moreover, a 1080w power supply that puts out a steady 12v, and up to 90a, is useless to me. But a 1080w ps that puts out 83-60a at 13-18v adjustable is what I need. So, again, it's how those watts breakdown that really matters to me, not the watts themselves.
As for comparing mppt to pwm, I fail to see any point in comparing the two in terms of watts? If the mppt is putting out 8a at 14.6v, and the pwm is putting out 7a at 14.6v, that's 116.8w vs. 102.2w, but how do I even begin to relate to how many watts are being delivered at my bank? And what, if any, benefit is there to it? At some point I have to divide the watts by 12v, to get a sense of what has been accomplished. And even that would be inaccurate, seeing as the watts at the bank are not a factor of 12v X amps, but some other voltage(s).
To use eating a meal as an analogy, to me watts is like eating eggs for breakfast, where voltage is the fork and amps are the eggs. All I care about is my belly gets full of nutrition, not what name is applied to the meal.
