All you need to know about the Sunmodule Plus SW290 Mono Black solar panel including rating, cost, efficiency, and warranty terms. An average 290W solar panel is 65 x 39 inches and weighs about 18 kilograms. The majority of monocrystalline 290w modules have 60 cells, but in systems meant for commercial use this number is usually higher. They are bigger, heavier and sometimes don't fit well on the roof of a house. The REC TwinPeak 2 takes the power output of 60-cell multicrystalline panels to groundbreaking new heights with it's twin panel design. 66/watt | 35 mm Black Frame | BoB | Power Tolerance STC 0-+5% | Plug Type: IP 67, MC4 Compatible | PV Wire 43. 3 inch, AWG 11 | 15A Fuse | Max System Voltage: 1000VDC UL and IEC | 60 Cells ( 17. Order Online or Call Us! 888-899-3509.