turtlepower
New Member
- Joined
- Dec 21, 2021
- Messages
- 11
I have about 1060 watts of solar at 33 volts and a 12 volt battery bank on my van. I'd like to run a small AC so I need as much juice as possible.
I'm thinking a 2000 watt PWM would be able to handle most of the work but is not efficient.
My understanding is that the PWM has to leave some of the electrons "on the table" due to its cheap and inefficient design. I don't think the electrons are escaping or destroyed - but are just left in the panels.
I'd guess at least 60% of the electricity would be used and put into the batteries with the PWM.
So if that leaves less than 40% (400 watts) still in the panels could I also run a 400 Watt MPPT charger to harvest the remaining power?
- Reading the data sheets I see that most MPPT chargers can have too many watts without damage, they just don't use the extra juice.
- Will Prowse says he runs MPPT and PWM in parallel so I'm trusting that it's OK to do this. here: https://diysolarforum.com/threads/pwm-mppt.5135/
- The idea would be to save money due to budget constraints
Do you think this idea makes sense? Am I misunderstanding something?
I'm thinking a 2000 watt PWM would be able to handle most of the work but is not efficient.
My understanding is that the PWM has to leave some of the electrons "on the table" due to its cheap and inefficient design. I don't think the electrons are escaping or destroyed - but are just left in the panels.
I'd guess at least 60% of the electricity would be used and put into the batteries with the PWM.
So if that leaves less than 40% (400 watts) still in the panels could I also run a 400 Watt MPPT charger to harvest the remaining power?
- Reading the data sheets I see that most MPPT chargers can have too many watts without damage, they just don't use the extra juice.
- Will Prowse says he runs MPPT and PWM in parallel so I'm trusting that it's OK to do this. here: https://diysolarforum.com/threads/pwm-mppt.5135/
- The idea would be to save money due to budget constraints
Do you think this idea makes sense? Am I misunderstanding something?