Well done, though I'd said it's a bit unfair to put PWM on a 24v panel and 12v bank. If the bank and panel were both 12v or 24v the mppt advantage would be something like 10-30% instead of the 300% you describe here. The main advantages of MPPT are seen during Bulk charging and with large loads during Absorption and Float modes. PWM + poly panels (lower Vmp) are a big bang-for-buck ("cheap and cheerful"?) combination for many folks, and the controller will cost about 1/3rd as much. I'm fulltime off-grid so the benefits of MPPT were worth the expense.
Good point. However, many people will be buying panels based mainly on cost, or for mobile applications size, and both of these can lead to using higher voltage panels with a 12v system. I’m designing a solar system for a friend who lives in a van which has various things on the roof which limits options in terms of panels. The best option given the space restraints is to get 3 x 150w panels which output 25.5v, so combined with MPPT we can get 450w of power in optimal conditions, vs around 260 for the same panels with a PWM controller, or 246w for 3 x 100w “12v” panels and a pwm controller.
i am installing 2x 100 w panels in *parallel* , so, they will still produce around 18 volts just at a higher amperage, so il stick with a 20A PWM i think as AFAIK theres no excess voltage that could be converted into amperage by using a MPPT controller..
Hello! Love watching all of your van conversion videos, we are converting a mwb l2h2 once we find a good second hand one. We are trying to work out solar atm and we’re not sure how much space we have on the roof, do you have any measurements of the roof? We plan on having a fan close to the sliding door and a heki sun roof by the back doors, not sure what space we are left with for solar but it’s more important than the heki!
Hi Susie. Good to hear! Are you using sketchup to design your van? If so you can import to scale models of a l2, h2 from the 3D warehouse. When you say fan above the sliding door, which type do you mean ? Do you know which solar panel you want/ need? Thanks for watching!
@@sampayne6318 Thanks for getting back to me so quickly! Yes my boyfriend is now using Sketch up and using the scale model, we cant wait to get started! I didn't describe the fan very well haha, i just meant as you walk through the sliding door the fan will be fitted there on the ceiling in the middle of the van. I think we are going for a Panasonic n245 and a LG neon r 370. Do you think its best to get 1 big battery or 2 smaller ones?
Well done, though I'd said it's a bit unfair to put PWM on a 24v panel and 12v bank. If the bank and panel were both 12v or 24v the mppt advantage would be something like 10-30% instead of the 300% you describe here. The main advantages of MPPT are seen during Bulk charging and with large loads during Absorption and Float modes.
PWM + poly panels (lower Vmp) are a big bang-for-buck ("cheap and cheerful"?) combination for many folks, and the controller will cost about 1/3rd as much. I'm fulltime off-grid so the benefits of MPPT were worth the expense.
Good point. However, many people will be buying panels based mainly on cost, or for mobile applications size, and both of these can lead to using higher voltage panels with a 12v system.
I’m designing a solar system for a friend who lives in a van which has various things on the roof which limits options in terms of panels. The best option given the space restraints is to get 3 x 150w panels which output 25.5v, so combined with MPPT we can get 450w of power in optimal conditions, vs around 260 for the same panels with a PWM controller, or 246w for 3 x 100w “12v” panels and a pwm controller.
Well explained.
i am installing 2x 100 w panels in *parallel* , so, they will still produce around 18 volts just at a higher amperage, so il stick with a 20A PWM i think as AFAIK theres no excess voltage that could be converted into amperage by using a MPPT controller..
Hello! Love watching all of your van conversion videos, we are converting a mwb l2h2 once we find a good second hand one. We are trying to work out solar atm and we’re not sure how much space we have on the roof, do you have any measurements of the roof? We plan on having a fan close to the sliding door and a heki sun roof by the back doors, not sure what space we are left with for solar but it’s more important than the heki!
Hi Susie. Good to hear! Are you using sketchup to design your van? If so you can import to scale models of a l2, h2 from the 3D warehouse. When you say fan above the sliding door, which type do you mean ? Do you know which solar panel you want/ need? Thanks for watching!
@@sampayne6318 Thanks for getting back to me so quickly! Yes my boyfriend is now using Sketch up and using the scale model, we cant wait to get started! I didn't describe the fan very well haha, i just meant as you walk through the sliding door the fan will be fitted there on the ceiling in the middle of the van. I think we are going for a Panasonic n245 and a LG neon r 370. Do you think its best to get 1 big battery or 2 smaller ones?
200w = 5.55A at 35 volt (not the way around) Current charges, Volt doesn't do anything
voltage “pushes” the current into the load (/battery)...