TechPro Standard Solar System Installation Guide

1. Site Survey and System Design

a. Load Assessment

• Identify daily power consumption of the household or facility (kWh/day).
• List all appliances, their wattage, and daily usage hours.
• Calculate total load and determine the required solar panel capacity, inverter size, and battery storage.

b. Site Suitability Check

• Evaluate roof structure, material, and orientation.
• Prefer north-facing roofs in Juba for maximum sun exposure.
• Ensure the roof can support the weight of solar panels and mounting hardware.

c. System Type Selection

• Grid-tied: Connected to utility grid (no batteries).
• Off-grid: Fully independent (uses batteries).
• Hybrid: Connected to grid and batteries.

2. Solar Panel Installation

a. Mounting Structure

• Use corrosion-resistant aluminum or galvanized steel frames.
• Panels should be tilted at an angle of 15°-30°, depending on roof pitch.
• Ensure proper row spacing to avoid panel shading.

b. Panel Fixing

• Secure panels using anti-theft stainless steel bolts.
• Use UV-resistant cable ties to hold wiring under panels neatly.
• Ensure all panels are aligned, level, and evenly spaced.

c. Wiring the Panels

• Connect panels in series or parallel based on system voltage requirements.
• Use MC4 connectors for weatherproof and secure connections.
• Label strings and ensure all junctions are accessible.

3. Inverter Installation

a. Inverter Location

• Install indoors or in a shaded, cool, and ventilated area.
• Mount at eye level, securely on a concrete or fire-resistant wall.
• Avoid placing near water sources or flammable materials.

b. Inverter Wiring

• Use appropriate gauge solar-rated DC cable.
• Connect PV input from panels, battery terminals (for hybrid/off-grid), and AC output to distribution board.
• Ensure proper earthing of inverter chassis.

c. Monitoring and Protection

• Enable Wi-Fi or GSM monitoring for real-time performance tracking.
• Install DC breakers, surge protectors, and isolators on both DC and AC sides.

4. Battery Installation (for Hybrid/Off-Grid Systems)

a. Battery Selection

• Use lithium-ion (LiFePO4) or deep-cycle lead-acid batteries.
• Ensure capacity matches load demand and backup requirements.

b. Installation Setup

• Place batteries on a rack or battery box in a cool, dry area.
• Maintain minimum 6-inch clearance from walls and between batteries.
• Connect in series or parallel based on voltage and capacity requirements.

c. Wiring and Safety

• Use heavy-duty battery cables, properly crimped and insulated.
• Install fuses or circuit breakers near battery terminals.
• Add Battery Management System (BMS) for health monitoring.

5. Grounding and Lightning Protection

• Ground panels, frames, inverter, and battery system to a common earth rod (minimum 6 ft deep).
• Use lightning arrestors especially in open areas or tall buildings.
• All metal parts should be bonded together and earthed properly.

6. System Testing and Commissioning

a. Performance Testing

Check open-circuit voltage (Voc) and short-circuit current (Isc) of panels.

Power on inverter and confirm:

• Solar input
• Battery status
• AC output

Simulate grid loss (for hybrid) to test automatic switchover.

b. Monitoring Setup

Configure mobile app or web dashboard.

Show client how to read system metrics: energy production, load consumption, battery status.

7. Client Handover and Training

Provide user manual, system layout diagram, and warranty cards. Train client on:

• Safe operation
• Battery care
• Cleaning solar panels (monthly with soft water and cloth)

Explain signs of system malfunction and whom to contact.

Best Practices for Safety and Longevity

• Never mix panel brands or ratings in a string.
• Clean panels monthly to remove dust and bird droppings.
• Check and retighten connections during quarterly maintenance.
• Replace batteries (if lead-acid) every 3-5 years or as needed.