What controller and equipment do I need for connecting 340-350 watt 120 cell 34.1-40Voc residential grid tied panels to off Grid system?

[FloridaJoe]

I have 2-Canadian Solar 350 watt 40Voc panels and 4-Q.Cell 340 watt 120 cell 34.1Voc panels from grid tied residential applications. I would like to use these in my off grid build. What controller do I need that would change the voltage input to correct output into 24v or 48v batteries? Looking for all equipment recommendations. Would also like Blu tooth monitoring functionality as well. Attached is the spec sheets for the panels I would like to use.

TIA
Best Regards, Joe

 

[sunshine_eggo]

These:

DIY Off Grid Solar Charge Controllers

Building a vehicle mounted solar power system? Let me help.

www.mobile-solarpower.com

That's a "60 cell" panel - well two 60 cell panels in parallel.

Series limit for common MPPT votlages:

100V: 2S
150V: 3S
200V: 4S
250V: 5S

 

[MichaelK]

For simplicity, you could wire all three in series to get 10.1A at 100.5V. The amperage of Q-cell panel is just 0.4A higher than the other two, so if you wired them in series, the overall amperage would drop down to 10.1. Since you get more power loss via voltage drop, I think raising the voltage 50% higher results in less loss then the 3.8% amperage loss. Voc would be ~113V at freezing, and ~126V at a frigid -40. That would give you ~1015W on paper, or about 850W in the real-world with a 85% fudge factor.

Charging amps would be ~40max into a 24V battery, but 20A into a 48V battery. You will need a 150V controller. Take a look at Epever's Tracer 5415AN. A Trojan 24V L-16 battery bank and a 2000W 24V sine-wave inverter like Samlex would be a good fit.