Charge controller question

kamchuka
kamchuka Registered Users Posts: 65 ✭✭
So I got 4 more panels. this is supposed to be 60a but clearly says 35a Max input? as I read deeper it states 1500w input... I'm confused. can I run 1300 watts on this thing?.
900 watts pv (building on) on poles, off grid 60a mppt, magnum 2k 12v msw, 1400 ah forklift battery (rewired to 12v), 8k diesel gen for house. honda eu6500, 2x 8D, coleman 800w inv for shop, honda 5k for well (pumps to 1000g cistern), ryobi 2k suitcase for mobile ops. 

Comments

  • mcgivor
    mcgivor Solar Expert Posts: 3,854 ✭✭✭✭✭✭
    edited April 2020 #2
    Nominal battery  voltage will dictate how much PV input can be used, output current remains constant at 60A,  so double the nominal battery voltage, double the maximum  wattage allowable. The maximum input current and voltage  indicates MPPT controller, which needs a voltage roughly twice the battery nominal, it then converts the higher  voltage to current to maximize performance of the array, but must not exceed 150V or 35A.

    The link below provides information which may answer some of your questions.
    https://www.solar-electric.com/learning-center/mppt-solar-charge-controllers.html/
    1500W, 6× Schutten 250W Poly panels , Schneider MPPT 60 150 CC, Schneider SW 2524 inverter, 400Ah LFP 24V nominal battery with Battery Bodyguard BMS 
    Second system 1890W  3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.  
    5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
  • kamchuka
    kamchuka Registered Users Posts: 65 ✭✭
    Till I can upgrade the Magnum inverter I'm running 12v. Big forklift battery. This is what i was planning for that controller. Too much?
    3×300w 32.9v
    2×200w 28v



    900 watts pv (building on) on poles, off grid 60a mppt, magnum 2k 12v msw, 1400 ah forklift battery (rewired to 12v), 8k diesel gen for house. honda eu6500, 2x 8D, coleman 800w inv for shop, honda 5k for well (pumps to 1000g cistern), ryobi 2k suitcase for mobile ops. 
  • mcgivor
    mcgivor Solar Expert Posts: 3,854 ✭✭✭✭✭✭
    For 12V it is at its limit with the 3 × 300W, the 200W modules are not a good fit as the voltage difference is not close enough, it would be better to have them on a separate controller. When changing to 24V 6 × 300W in 2 strings of 3 would work, but again the 200W ones would need to be in series on a separate MPPT controller. 
    1500W, 6× Schutten 250W Poly panels , Schneider MPPT 60 150 CC, Schneider SW 2524 inverter, 400Ah LFP 24V nominal battery with Battery Bodyguard BMS 
    Second system 1890W  3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.  
    5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
  • kamchuka
    kamchuka Registered Users Posts: 65 ✭✭
    Thanks for the info! I have a 25a cheapo I can run the two twos off for now. I'm looking for a better controller. Got that in a swap, has worked well though. Going on it's third year. Little by little!
    900 watts pv (building on) on poles, off grid 60a mppt, magnum 2k 12v msw, 1400 ah forklift battery (rewired to 12v), 8k diesel gen for house. honda eu6500, 2x 8D, coleman 800w inv for shop, honda 5k for well (pumps to 1000g cistern), ryobi 2k suitcase for mobile ops.