Solar Energy FAQ

Solar panels (photovoltaic or PV panels) convert sunlight into direct current (DC) electricity. An inverter converts this DC electricity into alternating current (AC) which powers your home or business. Excess electricity is either stored in a battery (hybrid system) or exported to the Meralco grid (on-grid/net metering system).

Yes — the Philippines is one of the best locations in Asia for solar. The country receives an average of 4.5 to 5.5 peak sun hours per day depending on your region. Mindanao and Visayas typically receive more sunshine, but even Metro Manila and Luzon have excellent solar potential year-round.

High-quality solar panels are rated for 25 to 30 years with a manufacturer's performance warranty guaranteeing at least 80% output after 25 years. In practice, many systems continue producing well beyond 30 years. Inverters typically last 10 to 15 years and may need one replacement during the panel's lifetime.

Yes, but at reduced output. Solar panels generate electricity from daylight, not just direct sunlight. On cloudy days, a typical system produces 10 to 25% of its normal output. The Philippines rainy season does reduce generation, but annual averages are still very favorable due to strong sunshine during the dry months.

An On-Grid system is connected to the Meralco grid with no battery. When you produce more than you consume, excess power is exported via net metering. A Hybrid system adds a battery bank, letting you store solar energy for use at night or during outages — giving greater energy independence and backup power capability.

A PPA is a zero-capital arrangement where Lumiel installs, owns, and maintains the solar system on your property at no upfront cost to you. You simply purchase the electricity generated at a fixed rate — typically lower than your current Meralco rate. PPAs are available for commercial and industrial clients with a minimum system size of 100 kWp.

BESS is a battery system that stores electricity generated by solar panels for later use. It enables backup power during outages, peak shaving (reducing demand charges), and load shifting (using stored energy during peak rate periods). BESS can be paired with a new solar installation or added to an existing system.

A typical Filipino home uses 200 to 400 kWh per month. A 3 kWp system (6 panels) suits small homes with basic appliances. A 6 kWp system (11 panels) handles a mid-size home with aircon. A 10 kWp system (19 panels) covers large homes fully. Use our free Solar Savings Calculator at lumieldevelopment.com/solar-calculator.html for a personalized estimate based on your actual appliances.

In the Philippines, residential solar systems typically cost ₱55,000 to ₱75,000 per kWp installed, including panels, inverter, mounting, wiring, and installation. A 3 kWp system runs approximately ₱165,000 to ₱225,000. A 6 kWp system runs approximately ₱330,000 to ₱450,000. Hybrid systems with battery add an additional ₱8,000 to ₱12,000 per kWh of battery capacity.

Savings depend on your system size, usage, and Meralco rate. A well-sized 6 kWp system typically offsets 80 to 90% of a household's daytime consumption, saving ₱6,000 to ₱10,000 per month for a home with a ₱8,000 to ₱12,000 monthly bill. Actual savings vary based on appliance usage and time of day.

Residential solar systems in the Philippines typically pay back in 4 to 7 years, depending on system cost, electricity consumption, and Meralco rate. With electricity rates continuing to rise, earlier installers often see payback periods shorter than initially projected. After payback, the system generates free electricity for 18 to 25+ more years.

Yes. Solar installations are considered permanent improvements to the property and generally increase market value. A fully paid-off solar system is an attractive selling point — buyers benefit from lower electricity bills from day one with no additional investment required.

Residential installations typically take 2 to 5 days once all permits and equipment are ready. The entire process from inquiry to energization — including site assessment, design, permitting, and installation — typically takes 4 to 10 weeks. Commercial and industrial projects range from 2 to 8 weeks. LGU projects vary by scope.

Solar installations require a Building Permit from your local government unit (LGU), an Electrical Permit, and for net metering, an application to your distribution utility (e.g., Meralco). Lumiel handles all permitting documentation as part of our end-to-end EPC service — you don't need to deal with the paperwork.

Our engineers evaluate your roof area, orientation, shading from trees or structures, structural capacity, electrical panel capacity, and your consumption profile. This determines the optimal system size and configuration. Site assessments are provided free of charge for qualified residential and commercial projects.

No — when installed correctly, solar mounting systems are weatherproof and designed to protect your roof, not damage it. We use industry-standard racking systems appropriate for your roof type (concrete, metal, or tile). All penetrations are sealed with waterproof flashing. Lumiel warrants all workmanship for one year post-installation.

Net Metering is a government program under the Renewable Energy Act (RA 9513) that allows solar owners to sell excess electricity back to their distribution utility (e.g., Meralco) at the prevailing generation rate. The exported electricity appears as a credit on your monthly bill — effectively making your meter run backwards when you're producing more than you consume.

Residential and commercial customers of any distribution utility in the Philippines are eligible for net metering for systems up to 100 kWp. A bi-directional meter is installed by the utility to measure both imported and exported energy. Lumiel prepares and submits all net metering application documents as part of our installation service.

Under the Renewable Energy Act, solar installations are exempt from import duties and VAT on solar equipment. Corporations investing in renewable energy may also qualify for income tax holidays and other fiscal incentives under the CREATE Act and BOI registration. Consult your tax adviser for guidance specific to your situation.

DOE-licensed solar contractors are authorized to install grid-connected solar systems in the Philippines. Using an unlicensed installer risks rejection of your net metering application, voided equipment warranties, and potential safety hazards. Lumiel Development Corp. is a fully DOE-licensed solar EPC contractor — all our installations meet DOE and utility requirements.

Solar panels have no moving parts and require minimal maintenance. The main task is periodic cleaning to remove dust, bird droppings, and debris — typically 2 to 4 times per year in Philippine conditions. Inverters and batteries benefit from annual inspection. Lumiel offers O&M plans covering scheduled cleaning, inspection, and performance reporting.

Modern solar inverters include built-in Wi-Fi monitoring that lets you track real-time generation, consumption, and export via a smartphone app or web portal. You can see daily, monthly, and lifetime production data. Lumiel's O&M packages include remote monitoring with alerts for any underperformance or faults.

Lumiel installations include: 12-year product warranty and 25-year performance warranty on panels (manufacturer), 5 to 10-year warranty on inverters (manufacturer), and 1-year workmanship warranty from Lumiel on all installation work. Battery warranties vary by brand, typically 5 to 10 years. All warranties are backed by local support.

Solar mounting systems installed by Lumiel are designed to withstand Philippine wind load requirements. Panels are rated for sustained winds of 200 km/h or more. During strong typhoons, we recommend switching off the system via the main disconnect switch as a precaution. In the event of any damage, our O&M team will assess and repair your system promptly.