APsystems (YC500A) Solar Microinverter

APsystems' YC500A solar microinverters allow you to easily optimize the performance of your solar array, while simplifying installation by eliminating the need for expensive and specialized high-voltage DC equipment and wiring. Standard DC "series string" solar installations leave every panel in your array at the mercy of the lowest performing panel in the same string. If one panel is 50% shaded, all panels in the string suffer the same performance reduction.

With your photovoltaic panels installed in pairs with YC500A microinverters, each panel is fully independent from the others, and all panels benefit from individual Maximum Power Point Tracking, which all works together to boost your system performance up to 20%! Up to 14 PV panels (with 7 YC500A inverters) can be installed in one 240V AC circuit, all protected by a single 20A breaker.

See a sample YC500A solar micro inverter system diagram here. (Diagram opens in a new window.)

Learn how to choose the best solar panels for your microinverter system, here. (PDF opens in a new window.)

• Maximum Power Output: 500W (from two solar modules)
• Individual MPPT for each panel
• Peak Efficiency: 95.5%
• Dimensions: 8.6in (220mm) x 5.4in (160mm) x 1.37in (29mm)
• Weight: 5.5 lbs. (2.5kg)
• Up to 14 solar modules (7x YC500s) in a string with a 20A breaker
• 10 year warranty included 25 year extended warranty available
• Designed for wide temperature range: -40°F/C to 149°F (69°C)

From the manufacturer:

Conventional “string” systems only operate as efficiently as the lowest-performing module, meaning reduced output from a shadow or leaf on one module cuts output across all modules in the array. Our microinverter technology individually monitors and maximizes power generation for each module in the array, boosting system efficiency by up to 20 percent. One APsystems unit handles two PV modules, lowering installation and balance-of-system costs.

• 500W (250W per panel) dual PV panel microinverter
• Individual Maximum Power Point Tracking per panel
• Connect up to 14 panels with 7 inverters per 240V string
• Only one 20A breaker required per PV string
• 10 year manufacturer warranty included
• Optional 25 year manufacturer warranty available

you can compare my price here

http://www.iet-solar.co.za/micro-inverter/