mppt vs pwm
Hi, A nice little video comparing mppt vs pwm with the batteries in bulk mode. mppt vs pwm
Forum Discussion
The buck convertor is exchanging the extra voltage for more amps, that's why I am getting the 20a extra. I wouldn't need it with a 12v system in PWM because at float voltage the panel is running efficiently and you get all of the power to use on a load. The battery wont accept the power but I can still use it either way.
Now does that mean MPPT is the best way to go, no it's just only thing to consider when designing a system. I use it because I ignorantly bought bought 24v panels to start with, for a year I wished I had bought 12v due to the cost of a MPPT controller.
Since they up'd the Voc spec on my controller I have been wanting to try a pair of 150w 12v panel in series vs my 24v panels. I am losing interest because of seeing the results from others doing the same with my controller as well as more respectable expensive controllers. What I am seeing is the conversion from a Higher Voc in the mid 40's to 12v isn't as efficient as a 24v panels mid 30's voltage. I'm seeing two 150w panels in series only producing a few amps more than my 245w panel. On a better controller I know of a 960w system using 160w panels in pairs for mid 40's producing 48a while I would expect 60a from four 250w 24v panels. Understanding the nuances can make a big difference.
Now does that mean MPPT is the best way to go, no it's just only thing to consider when designing a system. I use it because I ignorantly bought bought 24v panels to start with, for a year I wished I had bought 12v due to the cost of a MPPT controller.
Since they up'd the Voc spec on my controller I have been wanting to try a pair of 150w 12v panel in series vs my 24v panels. I am losing interest because of seeing the results from others doing the same with my controller as well as more respectable expensive controllers. What I am seeing is the conversion from a Higher Voc in the mid 40's to 12v isn't as efficient as a 24v panels mid 30's voltage. I'm seeing two 150w panels in series only producing a few amps more than my 245w panel. On a better controller I know of a 960w system using 160w panels in pairs for mid 40's producing 48a while I would expect 60a from four 250w 24v panels. Understanding the nuances can make a big difference.
