Frequently Asked Questions

About Solar Savings

What are the benefits of going solar?

Financial benefitGoing solar can financially benefit households and businesses. Installing solar reduces utility costs, by both reducing consumption from the grid (Meralco) and selling off excess supply for peso credits (under Net Metering). Furthermore, solar panels can produce power for over 25 years, with little to no maintenance—reducing costs for the long haul.

Environmental benefitSolar energy is also renewable and eco-friendly. Growing concerns on climate change have constantly encouraged the move to cleaner alternatives. Switching to solar reduces dependence on harmful fossil fuels, such as coal and oil, which seeks to lessen the impact on global warming.

How much can I save with solar?

Solar savings will depend on the size of the system installed. Systems recommended and installed by Solterra typically reduce a home’s electricity bill by about 40-50%.

For more detailed case studies, visit our project page.

How can I save with solar if I'm out during the day?

Even with people outside during the day, solar energy continues to power day time loads, such as refrigerators and other appliances that are constantly kept running.

For even greater savings, homes and businesses can apply for Net Metering with Meralco and export excess energy generated during the day for peso credits. These earned peso credits can then be used to pay for consumption from the grid (Meralco), in situations where solar is unavailable. For more information on Net Metering, visit this resource.

Can I use solar during night time?

Solar energy is only available under daylight, and cannot be stored for night time use with a grid-tied system. In order to store power for night time use, homes and businesses will require batteries for storage.

Do you offer systems with batteries?

Unfortunately, Solterra does not offer solar with batteries at the moment. We only offer grid-tied systems to our clients.

What is the typical ROI for a solar panel system?

Clients typically earn back their investments on the system, through savings, within 4-5 years. For larger systems, earn back period could be as short as 3 years.

About Net Metering

What is Net Metering?

The net metering scheme allows homeowners to sell unused energy to Meralco in exchange for peso credits. Credits can then be used at the end of each month to pay for and decrease charges on your overall electric bill. For more information on Net Metering, visit this resource.

How do I apply for Net Metering?

Clients who install their systems with Solterra will be provided with the Net Metering application, along with all other necessary documents—filled-up and ready for submission. They simply need to submit these documents to their Meralco business center in order to apply for net metering. For a step-by-step guide on how to apply, visit this resource.

Is the Net Metering application included in your quotation?

Clients will be provided with all necessary documents for their application for Net Metering. The quotation, however, will not cover Net Metering-related fees. These will include fees for Distribution Impact Study, COC, CFEI, and the costs of service entrance modifications. As of May 2018, the costs for net metering application are as follows:

Net Metering-related Fees Cost
Distribution Impact Study Fee Php1,900
Certificate of Compliance Fee Php1,500
Certificate of Final Electrical Inspection (varies) Php5,000
Costs of Service Entrance Modifications (varies) Php8,000 to Php20,000
How long is the Meralco processing time for Net Metering?

Net Metering normally takes 2-3 months to process, mostly as waiting time for Meralco to go through the submitted documents. For a more detailed process and estimate, visit this resource.

Have there been instances when Meralco disapproved a Net Metering application?

Fortunately, Solterra has not experienced any disapproval from Meralco and hopes never to. We strive to provide our clients with certified solar equipment, in order to ensure high-quality that passes authority standards.

How it Works

How does the system work?

Grid-tied systems power homes during the day, when there is sunlight. The energy gathered goes through the system, and is immediately used for the home’s, or business’, consumption. Those that produce excess energy may apply for Net Metering, in order to export the unused energy in exchange for peso credits. Credits will then be used at the end of each month to further decrease utility costs from Meralco. How System Works In cases wherein solar energy is not enough to fully power the home, the system will automatically source the needed power from the grid (Meralco). All this is done seamlessly, without any switching or flickering of lights.

What happens if it's raining or cloudy?

Despite lack of sunlight, the system will continue to produce power from energy it can gather. It will, however, create only a fraction of its normal output.

Can I use grid tied systems during a power outage?

Unfortunately, no. Grid-tied systems are programmed to be utility interactive, meaning they must sense utility power before producing their own energy and feeding it into the grid. This falls under the anti-islanding policy of Meralco, where grid-tied systems have to shut down when there is a power outage. This serves as a safety precaution, in order to ensure that no power flows into the grid while line men may be working on them.

How to Go Solar

How much solar do I need for my home?

Solar needs will vary on the number of appliances being run, as well as the average monthly electricity bill of the household.

For a free personalized recommendation, please fill out this form.

Can solar be connected to one 2HP air conditioning unit only?

A 2HP air conditioner requires 1.5kW of power to run. Installing a 2kW system may power a 2HP air conditioner, along with some other appliances, such as refrigerators, fans and lights. Unfortunately, grid-tied systems cannot be connected to a single appliance. The installed system will go through the home’s electrical panel and connect to all of the appliances under it.

What is the weight and size of the solar panels?

Solar panels use by Solterra are about 20kg in weight, and have dimensions of 2m x 1m.

Will you modify the wirings in my home?

Installation of solar systems does not require changes to a home’s wiring. The system will simply connect to the electrical panel, and electricity from solar will seamlessly flow in.

Is there any maintenance needed after installation?

Solar requires very minimal maintenance when installed. Should the location be in a dusty area, a quick hose down to rid dirt off the panels may be done every few months. Otherwise, the occasional rain should suffice.

Is the system expandable or upgradable?

Yes, solar panel systems are easily expandable. A 2kW system can easily add another 2kW, in order to create a 4kW system for the home. In the event that a client would like to expand their system, a second inverter will be installed parallel to the existing inverter. In other words, Solterra will not remove used inverters nor install ones with greater capacity. Instead, the client will have two inverters connected to two separate solar arrays that will simultaneously power the home. Expandable System

The home is still under construction, when can the solar panels be installed?

The solar panel system may be installed as soon as roofing is done.

In case of a move, can solar panels be transferred to a new home?

Unfortunately, we do not recommend moving a solar panel system into a new home. That said, we recommend installing solar only if you expect to live in that home for a long time.

About Our Service

What is Solterra's coverage area?

Solterra currently installs systems in Metro Manila, Bulacan, Pampanga, Rizal, Cavite, Laguna, and Batangas.

How long until installation, once order is confirmed?

After confirmation, our staff can usually install the system within 5 business days or less.

How long does the actual installation take?

For 3kW systems or smaller, it usually takes just one day to finish the installation. For larger systems, it could take two days or more, depending on the size. It will also take longer for installations on roof decks and steep slope roofs.

What are your payment options?

Solterra only accept payments on cash-basis. More specifically, 50% upon delivery of the equipment and the remaining 50% after installation, as well as testing of the system.

How long are your warranties?

Solar panels have a 25-year power output warranty and a 10-year product warranty. Inverters, on the other hand, have a 5-year product warranty.