Includes three key sub-links: project filing/approval, land compliance review, and resource assessment. It is necessary to submit a project application report to the local energy authority for filing, verify the land nature (ensuring it is non-basic farmland and non-ecological protection area) and complete land use pre-approval, and at the same time conduct PV resource evaluation (such as annual equivalent utilization hours, irradiance distribution) through professional institutions to issue a feasibility study report.

Conduct detailed geological surveys (testing soil bearing capacity, groundwater level), design the overall layout of the power station (module array arrangement, inverter room location, cable routing) combined with resource data, and optimize key technical schemes-such as selecting brackets with wind resistance levels (usually zLevel 12) according to wind speed, configuring inverters with antifreeze circulation for low-temperature environment needs, and completing the connection system design (determining grid connection points and transmission line specifications).

Conduct centralized procurement based on the characteristics of large-scale projects-core equipment (high-efficiency PV modules, centralized inverters, box-type transformers) needs to select manufacturers with large-scale supply capacity through bidding and sign long-term supply agreements (to ensure delivery timeliness); auxiliary equipment (brackets, cables, combiner boxes) needs to match the parameters of core equipment, and at the same time establish a warehousing and logistics system (set up temporary warehouses at the project site, and deliver goods in batches according to the construction progress) to avoid equipment backlog or shortage. For large-scale ground power stations, the equipment is usually sourced from the Tier 1 brands selected by Bloomberg each quarter. The brands represented by Joinsun all meet the standards and have financial attributes.

Includes three core contents: site leveling (clearing vegetation, leveling terrain, controlling the slope at s5°), foundation construction (pouring concrete piles or prefabricated piles according to design to fix brackets, which need to meet anti-pulling and anti-compression requirements), and supporting facility construction (building inverter rooms, SVG reactive power compensation stations, operation and maintenance comprehensive buildings, and laying on-site construction roads). Some projects also need to build flood control and drainage systems (such as digging drainage ditches in rainy areas).

Promote the installation work in stages-first complete the bracket installation (ensure thearray spacing meets the shading avoidance requirements, the row spacing is usually 3-5 times the height of the module), then lay the PV modules and complete the series-parallel wiring, then install electrical equipment such as centralized inverters and box-type transformers, and finally complete the on-site cable laying (using direct burial or bridge method, with anti-corrosion and lightning protection treatment) to realize the circuit connection of “module – combiner box – inverter – transformer”.

Carry out commissioning in two steps-first conduct single-unit commissioning (test the single-machine operation parameters of inverters, transformers and other equipment to ensure compliance with design standards), then conduct system joint commissioning (simulate grid-connected working conditions, test performance such as power control, reactive power regulation, and low-voltage ride-through); then submit a grid-connection acceptance application to the power grid company,cooperate to complete relay protection setting and metering device verification, and obtain gridconnection permission after on-site testing.

After official grid connection, commercial power generation is started, and the remotemonitoring platform (such as SCADA system) is used to monitor power generation and equipmentoperation status in real time; daily operation and maintenance includes regular module cleaning (usingmechanical cleaning vehicles or high-pressure water guns, 1-2 times a month according to dustaccumulation), equipment inspection (checking inverter faults, cable joint overheating and other issues),and regular maintenance (transformer oil quality testing once a year, bracket anti-corrosion treatmentonce every 3 years) to ensure stable income of the power station within the 25-year life cycle.

Currently, most large-scale ground-mounted power stations are equipped with “PV + energystorage” systems, which need to independently complete the installation and commissioning of energy storage battery cabins, PCS (power conversion system), and EMS (energy management system), formulate charging and discharging strategies (such as charging during the peak PV output period during the day, discharging during the peak electricity consumption period at night, or participating in grid peak shaving and frequency modulation) to achieve “peak shaving and valley filling” and improve the grid connection stability and revenue flexibility of the power station.