e8 / PPA Solar PV Design Implementation O&M Marshall Islands March 31-April 11, Field investigation Installation site confirmation Roof-mounted Confirm that a lift to the roof is provided. Wall-mounted Determine whether or not the provision of scaffolding and a man lift truck is necessary. Ground-mounted Recognize the work range of construction equipment (yumbo). Verification of installation conditions Deck roofCheck waterproof type. Folded plate roofCheck folded plate fixture type. Sloping roof Verify inclination and anti-slip properties Confirmation of interconnect ed point Circuit breaker for interconnected system Confirm an extended space. High-voltage protection relay If an outage line is separated from the system, confirm the separating point. Verification of piping and wiring routes Route check Determine whether or not the provision of scaffolding and a man lift truck is necessary. Determine whether the existing route can be used. Introduction route check Verify installation location of construction equipment (wrecker ). ８・３ － Construction Maintenance Points （１）

e8 / PPA Solar PV Design Implementation O&M Marshall Islands March 31-April 11, Entrance Marking Temporary office Provide an on- site office. Determine whether or not the provision of scaffolding and a man lift truck is necessary. Temporary yard Provide a materials yard. Provide a yard close to the site. Marking Marking based on reference line Check the drawing. Confirm shadows. Introduction Crane placement Placement of crane at predetermined location Verify hoisting loads and construction equipment. Confirm the operating, hanging and signaling workers. Prohibit admittance to work area. Inspect the hoisting accessory. Rooftop carePrevention with control panel Install to prevent the wind from blowing solar cell modules. Provision of access made by stage planks. Bind stage planks. CraningCraning the platform and solar cell modules Confirm the stability of the crane and load at a lift of 30 cm above the ground. Do not enter the space directly beneath loads. ８・３ － Construction Maintenance Points （２）

e8 / PPA Solar PV Design Implementation O&M Marshall Islands March 31-April 11, ８・３ － Construction Maintenance Points （３） Fixture mounting Mount fixture.Mount fixtures to marking. Assembly of platform Assemble the platform. With stainless bolts, mount the platform to fixture. Confirm that the platform top is horizontal and the platform is upright. Platform installation Installation of solar cell module Mounting solar cell module to the platform Carefully handle the solar cell module, and mount it to the fixture without damaging the module. Align modules flush with longitudinal and lateral lines. During mounting, workers shall communicate with one another. Solar cells installation

e8 / PPA Solar PV Design Implementation O&M Marshall Islands March 31-April 11, ８・３ － Construction Maintenance Points （４） Wiring between solar cell modules Wiring of connector cables between modules Confirm that the circuit and system are constructed according to the drawings. Connection between solar cell modules Wiring of connectors between modules Confirm the polarity and system of the cable connectors, and connect them. Confirm that the cable plug is securely connected. After the connection between modules, cover terminals with insulation tape to prevent short-circuits. Equipment mounting Mounting power conditioner and interconnection board Mount according to the drawing. Mount so that devices cannot cast shadows on each other. Be careful not to damage the casing. Laying electrical conduits Using hangers, saddles and other metal supports, mount conduits. Mount according to the drawing. Laying cable rackWith metal supports, mount the cable rack. Mount according to the drawing. Laying cable Select line types and distance, according to design drawing. Be careful not to damage the covering of the cable. Aligning cablesMount cables to insulock by insulation lock. Connecting wires Connection to switchboards Use of appropriate terminals Electrical piping and wiring work

e8 / PPA Solar PV Design Implementation O&M Marshall Islands March 31-April 11, Breaker, OVGR and extension Outage With electroscope, confirm an outage. Circuit breaker and OVGR extension Ground units. Ground all devices. ZPD and OVGR are mounted. ZPD and OVGR are mounted in place. Circuit breaker extension Outage With an electroscope, confirm outage. Mount breaker. Mount circuit breaker in place. Restoration Check inside of cubicle. Outage work (remodeling switchboards) ８・３ － Construction Maintenance Points （５） Inspection Visual Inspection Visual Inspection of Equipment Confirm that devices are free from cracks. Open-Voltage Measurement Measurement of voltage per system with tester Measure the voltage of each circuit in inverter, and record. Insulation resistance measurement Measurement of insulation resistance with megger Check batteries. Verify the connections to the grounding terminals. Solar cell circuit Measure voltage across grounding terminals, and record. Voltage across inverter and interconnected system Measure voltage across batteries and across lines, and record. Voltage across interconnected system and interconnected point Measure voltage across batteries and across lines, and record.