navitron
 
Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address - following recent spam/hack attempts on the forum, all security is set to "high", and "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
 
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: MMPT controller limiting charge  (Read 953 times)
keithj1961
Newbie
*
Offline Offline

Posts: 2


« on: October 30, 2015, 01:47:42 PM »

HI all,
This is my first post , but sure not the last. I have a 3KW 12 panel(265W) solar array sepaerated into three 1KW arrays. This helps me take advantage of panels south east, south and south west. I have three Blue Solar 150/35 Mttp's which can carry 150v and charge 35amps. I have a Hoppecke sun pack which contains four 6V 400AH batteries set up as a 24V 400Amp hour bank.  Each array is set up as as two in series parellel strings. I have used the Victron mttp calculator and this shows that all is good but the maximum charge is limited to 35 amp which makes sense as i have 35 amp mttp. It seems as if i might loose out on extra amp's if  the arrays are working to the max.
Would i be better off using a higher charging mppt or would the inefficiencies in the system mean that 35amp per array is not to be expected.
Hope you can help and good to be part of this forum
Logged
billi
Global Moderator
Hero Member
*****
Offline Offline

Posts: 9031



WWW
« Reply #1 on: October 30, 2015, 03:47:33 PM »

Hi ,

Sounds fine to me   35 A and in the Datasheet its written 1000 watt  at 24Volt  per charger  so matches your array  of about  3180 watt , that you hardly will ever see

and  usually  the battery voltage is higher than 24 volt when the sun     is shining   so say for example 35 A x 26 Volt = 910 watt

billi
Logged

1.6 kw and 2.4 kw   PV array  , Outback MX 60 and FM80 charge controller  ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw  windturbine
keithj1961
Newbie
*
Offline Offline

Posts: 2


« Reply #2 on: October 30, 2015, 07:14:16 PM »

Thanks for your help. Just wanted to check before i start the setup.  Great forum for getting help, many thanks
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!