What Should a Complete Solar Installation Quote Include?

A complete solar installation quotation in the Philippines should explain exactly what the provider proposes to supply, install, test and hand over. A total price without a detailed scope is difficult to compare and can lead to disagreement when work begins.

Before accepting a proposal, check that the technical design, equipment list, installation responsibilities, utility process, exclusions and support terms are written down.

Equipment should be identified by model

The quotation should state the solar module manufacturer and model, rated wattage, quantity and total DC capacity. It should also identify the inverter manufacturer and model, AC rating, phase and relevant operating characteristics. If a battery is included, request its model, nominal and usable capacity, power rating and compatibility information.

Ask for manufacturer datasheets rather than relying only on marketing names or broad descriptions such as premium panel. A proposal should also explain any planned substitution process if the selected equipment becomes unavailable.

Mounting and electrical scope

The installation scope should identify the mounting approach and materials suitable for the roof or site. It should explain how cable routes, penetrations and waterproofing will be handled. For electrical work, look for wiring, conduits, disconnects, overcurrent protection, grounding, labelling and other protective equipment appropriate to the design.

The quote should say whether roof repairs, panel-board upgrades, additional cable runs, civil works or access equipment are included. Unclear exclusions can materially change the final cost.

Permits, utility coordination and commissioning

State who prepares and submits required applications, coordinates inspections and manages utility-related work. Requirements depend on system configuration, location and the authorities or distribution utility involved. The ERC’s amended net-metering rules provide the current regulatory context for qualified net-metering participants. For customers in the Meralco service area, its net-metering application page provides utility-specific forms and process information. Confirm the equivalent process with the utility serving your property.

Commissioning should include appropriate testing, system configuration, monitoring setup, documentation and user orientation. Ask what records will be handed over and how the system’s operation will be explained.

Warranties and after-sales support

Separate product warranties from workmanship coverage. The quote should identify the warranty provider, duration, key exclusions and process for making a claim. Ask who will respond to faults, whether labour or transport is covered and what maintenance is recommended.

A warranty is only useful when responsibilities and procedures are understood. Do not treat a verbal statement as a substitute for written terms.

Commercial terms and exclusions

Check the total amount, taxes, payment schedule, validity period, project milestones, completion assumptions and change-order process. Ask whether monitoring subscriptions, internet connectivity, maintenance, future service visits or third-party charges create recurring costs.

Use a complete-quote checklist

Before signing, confirm that you have the equipment schedule, capacity definitions, layout or design basis, installation scope, safety and protection details, utility responsibilities, commissioning process, warranties, exclusions and support contacts. Compare this document with how to compare solar quotes and the solar project bidding process.

A transparent quotation makes it easier to understand the project before money is committed. Ask for written clarification wherever the proposed work or responsibility is not clear.

Official and technical references

• ERC: 2025 amended net-metering rules
• Meralco: Net-metering application forms and requirements