Proposed Solar Install thoughts
Planning my solar install and here is what I'm currently thinking. Need opinions on the pros amd cons of my install. morningstar tristar 45amp mppt charge controller with remote temp sensor and rem...
Forum Discussion
AlbertaNewbie wrote:
I have room for 8 250 w panels, measured, templates laid out and cad drawing completed. maybe my calcs are wrong, but 1000w/37v=27amps x 2 for a 12v system= 54 amps, derate for efficiency losses and flat mounted panels by apprx 15-20% =43-45amps (agreed too much, will drop to 3 panels or run a second controller.)
battery bank will be 6x6v trojans wired in series/parallel for a 12v system with 00 wire between. 3000w inverter is planned to be added to be able to power mobile office and 13.5 ac as needed during the day
Good job on the panel layout.
Your electrical math is wrong. I don't know where you got 37 volts from, Voc I guess. That's irrelevant. The amp rating of a controller is it's output amp rating which will be at battery voltage. So, for a rough idea, ignoring losses, divide 1000w by 12v to get 83 amps possible controller output.
I would recommend an Outback FM80 charge controller. It will handle 80 amps which likely won't be exceeded after you factor in losses and weather realities.
For an inverter around 3,000 watts I would look at an Outback VFX2812 to match that charge controller. You can control and monitor both of them with a Mate2 mounted in the wall. Outback also makes a battery gauge they call the FlexNetDC.
