Welcome to the Solar Collector
Brainstorming and Development Page!


 

Home

Hot Air Collector

Hot Water Project 1

Hot Water & Space Heating

Solar Electric

Solar Construction 101

FAQs

Best Collectors

Simply Solar
Register Calendar Latest Topics
 
 
 


Reply
  Author   Comment  
svencool

Registered:
Posts: 13
Reply with quote  #1 
Does anyone have a favorite? I'm looking for opinions on MPPT controllers that will handle up to 800watts or at least 60amps. Any personal experiences anyone want to share?

Also was wondering when getting up to 800watts does it make more sense to be looking at 24v systems or bigger and why? Currently at a 12v system with 200 watts of panels with 200ah of batteries.

Thanks,
Mike

stmbtwle

Avatar / Picture

Registered:
Posts: 2,699
Reply with quote  #2 
The controlling factor with controllers is AMPS not WATTS. A controller rated at 60 amps can handle twice as much power (watts) at 24v than it can at 12v. If it will operate at 48v it will handle twice the power than at 24v. If you don't believe me check the specs.

Wiring size is also related to amps, so a given wire can handle more power at a higher voltage.

You'll also find that large 24v panels are cheaper than the same wattage in 12v panels.

So just given the cost, you're usually better off with the higher voltage.

HOWEVER you also have to consider the availability of other equipment. 12v lights and accessories are easy to get, 24v not so much. 48v even less so.

With RVs or boats, it's nice to be compatible with the other systems on board.

It's not as simple as it may seem.

__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
svencool

Registered:
Posts: 13
Reply with quote  #3 
Well I have the basic Renogy PWM charge controller and it seems like its not very consistent when charging. I will be adding more panels to my setup and wanna start looking at a different controller but was looking for some recommendations [smile]

Mike
stmbtwle

Avatar / Picture

Registered:
Posts: 2,699
Reply with quote  #4 
Can't be of much help. I have a Blue Sky controller and while I like it, it has its limitations. I think I'd contact http://www.solar-electric.com and ask their opinion. They sell many different brands and can probably be objective. Make up your mind what you want to do first, different controllers have different advantages. And in all fairness, buy it from them.
__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
svencool

Registered:
Posts: 13
Reply with quote  #5 
Hey Willie, I talk to those guys and they hooked me up!!!! They were very helpful for a beginner like myself lol and I made the purchase through them... Thanks again.....

Mike
stmbtwle

Avatar / Picture

Registered:
Posts: 2,699
Reply with quote  #6 
Yes I've always been happy with their advice and service. Their web site alone is a gold mine. What did you order?
__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
Bert

Avatar / Picture

Registered:
Posts: 499
Reply with quote  #7 
This one works great for me.
http://www.amazon.com/gp/product/B00E7NI9PE?psc=1&redirect=true&ref_=oh_aui_search_detailpage

__________________
Bert K.
Michigan

https://www.youtube.com/user/1thinkhealthy/playlists
svencool

Registered:
Posts: 13
Reply with quote  #8 
Well Dan was leaning towards a Morningstar TriStar 30A MPPT SCC, But I told him I was looking  at a Midnite Classic 150 and he said it was MAJOR over kill for what I needed. But we talked a while about different systems. I told him I was just playing with this and one day would like to take my summer home in Wis total solar. So I decided to go with the Classic 150. I know its more money but I like the idea of being able to control about every aspect [smile] So I'm just learning and boy do I still have a ton to learn lol. [smile]

Mike
robertpelletier

Avatar / Picture

Registered:
Posts: 16
Reply with quote  #9 
Typical PV module produces power with maximum power voltage of around 17 V when measured at a cell temperature of 25°C, it can drop to around 15 V on a very hot day and it can also rise to 18 V on a very cold day. The major principle of MPPT is to extract the maximum available power from PV module by making them operate at the most efficient voltage. MPPT checks output of PV module, compares it to battery voltage then fixes what is the best power that PV module can produce to charge the battery and converts it to the best voltage to get maximum current into battery. It can also supply power to a DC load, which is connected directly to the battery.
__________________
Best solar flood lights - Top reviews of 2018
Best solar flood lights - Top reviews of 2018  
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.

 

web statistics