300 Watts Solar system complete installation guide | Solar system cost | Battery | Inverter

300 Watts Solar System Complete Installation Guide: Cost, Battery & Inverter (2026)Are you looking to slash your electricity bills with a reliable, budget-friendly green energy solution? A 300-watt solar system is an excellent entry-point for homeowners in Pakistan. Whether you want to power basic lights and fans or learn the basics of photovoltaic (PV) installation, this practical guide covers everything from hardware selection to the final tilt angle. Why Choose a 300W Solar System? S0olar energy is the cleanest and most cost-effective way to reduce your dependence on the grid. By using high-quality panels from brands like Tesla Solar, Inverex, Risen, or Canadian Solar, you can ensure long-term savings and energy independence. A 300W system is ideal for: Running 3–4 LED bulbs and 2–3 energy-efficient fans. Charging laptops and mobile devices. Small home offices or emergency backup. The Core Components For this practical tutorial, we utilized a specific set of high-performance equipment known for durability in the Pakistani climate:1. Solar Panels (PV Panels)We used two Inverex 180-Watt Mono PERC panels. Technology: Mono PERC (Passivated Emitter and Rear Cell) technology is superior to standard panels, offering higher efficiency even in low-light or high-heat conditions. Total Output: ~360W (providing a healthy buffer for a 300W rated system).2. The Inverter (UPS)The heart of the system is the Homage UPS HTD-12SCC (1000W - 12V).Feature: This is a Solar-Supported Inverter with a built-in charge controller. It manages power between your panels, battery, and home appliances seamlessly.3. The Battery To ensure power at night, we integrated the Phoenix TX 1800 Tubular Battery. Why Tubular? Unlike standard lead-acid batteries, tubular batteries (like those from AGS, Volta, or Osaka) are designed for "deep cycling," meaning they last much longer under frequent charging and discharging.Step-by-Step Installation GuideStep 1: Mounting & Tilt AngleThe efficiency of your system depends on how the panels face the sun. In Pakistan, panels should always face South.Summer Angle: ~15° to 20°Winter Angle: ~40° to 45°Fixed Average: If you don't want to adjust them seasonally, a fixed angle of 25° to 30° (depending on your city’s latitude) is recommended.Step 2: Wiring the Solar BoardConnect your panels in parallel (Positive to Positive, Negative to Negative) to maintain a 12V system while increasing the current (Amperes). Use high-quality DC wires to prevent energy loss through heat.Step 3: Connecting the Battery & InverterBattery First: Always connect the battery to the inverter/UPS first. This allows the internal controller to detect the system voltage (12V).Solar Second: Connect the DC wires from your solar panels to the "Solar Input" terminals on the Homage UPS.Cost Analysis in Pakistan (2026 Estimates)While prices fluctuate based on the dollar rate and brand availability, here is a breakdown of what to expect:ComponentBrand ExampleEstimated Price (PKR)Solar Panels (x2)Inverex 180W Mono PERC₨ 18,000 - 22,000Inverter / UPSHomage 1000W SCC₨ 35,000 - 45,000BatteryPhoenix TX 1800₨ 38,000 - 46,000Mounting & WiresLocal Steel/Copper₨ 8,000 - 12,000Total Estimated Cost₨ 99,000 - 125,000ConclusionSetting up a 300W solar system is a practical and rewarding DIY project that pays for itself through reduced bills. By choosing reputable brands like Inverex, Phoenix, and Homage, you ensure that your investment lasts for years.