I BOUGHT A Sunny Boy SB3000TLDID THAT DID NOT COME WITH THE PV PANEL BOX .SO I GOT A SQUARE D WITH 20AMP BREAKER. THERE IS 3 WIRE COMING FROM THE INVERTER......THERE IS A RED WIRE,,,, ORANGE WIRE,,,, AND A BLACK WIRE.....I THINK THE RED IS +POS AND THE ORANGE IS ALSO + POS, AND THE BLACK IS...