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Expert answers about Solar PV, Battery Storage, Monitoring Systems, O&M, Water Treatment, and Hybrid Energy Solutions

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Frequently Asked Questions

Based on Apple Energy experiences in solar PV, BESS energy storage, O&M, robotic cleaning, chemical cleaning, monitoring, and hybrid power solutions, we have observed that customers usually ask the following important questions before making a decision. We have answered them in a clear and practical way to help customers understand the right solution for their site.

Solar PV EPC Questions

Solar PV EPC

Solar system size depends on load profile, daytime consumption, available space, roof structure, inverter sizing, export limitation, and future expansion plans. A lower or higher capacity is not always better; the right design should match the site requirement.

Not always. The system should be designed according to your consumption, sanctioned load, roof space, inverter capacity, and net metering feasibility. Oversizing without proper design can create technical and approval issues.

Panel quality, inverter efficiency, protection equipment, cable sizing, mounting structure, and installation quality directly affect safety, performance, and long-term generation.

A proper design should include load assessment, layout planning, inverter sizing, string design, protection system, generation estimate, and site-specific recommendations.

The site survey helps check roof strength, shading, cable routes, panel placement, earthing, inverter location, and safety requirements before final execution.

Battery Energy Storage System — BESS Questions

Battery Energy Storage System — BESS

Solar capacity is measured according to generation, while BESS capacity depends on backup load, backup duration, discharge rate, battery technology, and operational requirement. Both must be designed separately.

BESS should not be sized only on total connected load. It should be designed around the critical load that needs backup, such as production lines, motors, IT systems, lighting, pumps, or essential equipment.

Yes, but the starting current, surge load, power factor, and load behavior must be checked before finalizing the BESS and inverter capacity.

EMS controls charging, discharging, load priority, grid interaction, generator support, and solar utilization. Without proper EMS, the BESS may not operate efficiently.

Yes, but it requires a proper study of voltage level, transformer capacity, protection system, synchronization, fault level, and integration method.

Solar PV Operation & Maintenance — O&M Questions

Solar PV Operation & Maintenance — O&M

Common reasons include dust, shading, inverter faults, string failure, loose connections, high temperature, grid tripping, cable losses, panel degradation, or incorrect system settings.

A solar system can keep running while still losing generation silently. Regular O&M helps detect hidden faults, safety issues, loose connections, underperforming strings, and inverter alarms.

This is checked through monitoring data, inverter logs, string current comparison, physical inspection, IV curve testing if required, and generation trend analysis.

Performance can drop due to dust accumulation, poor maintenance, water stains, loose wiring, inverter errors, damaged connectors, shading changes, or lack of monitoring.

Yes. Apple Energy can inspect the existing system, identify technical issues, and provide O&M support based on the site condition.

Robotic Solar Panel Cleaning Questions

Robotic Solar Panel Cleaning

Robotic cleaning is more consistent, faster, safer for large plants, and reduces dependency on manual labor. It is especially useful for commercial and industrial solar sites.

Robotic cleaning is safe when the correct machine, brush type, pressure, and cleaning method are used. The equipment must be suitable for the panel surface and site structure.

Not always. Site layout, panel tilt, row spacing, access path, roof structure, and safety conditions must be checked before recommending robotic cleaning.

Frequency depends on dust level, site environment, weather, bird droppings, industrial pollution, and generation loss due to soiling.

In many cases, yes. If generation loss is due to dust or soiling, cleaning can improve sunlight absorption and help recover performance.

Chemical Solar Panel Cleaning Questions

Chemical Solar Panel Cleaning

This usually happens because of high TDS in the cleaning water. When the water dries, minerals and salts remain on the panel surface and create white marks or a cloudy layer.

Apple Energy recommends using water with a maximum TDS level of 300–400 ppm for solar panel cleaning. Higher TDS water can leave mineral deposits on the glass.

Chemical cleaning is required when normal water cleaning cannot remove hard stains, bird droppings, oily residue, cement dust, industrial pollution, salt deposits, or mineral marks.

No. Harsh chemicals, acids, detergents, or abrasive materials can damage the panel glass, frame, sealant, or coating. Only solar-safe chemicals should be used.

Yes. Poor cleaning methods can leave stains, scratches, residue, or mineral deposits, which may reduce sunlight absorption and affect generation.

Monitoring / EMS / SCADA Questions

Monitoring / EMS / SCADA

The inverter display gives basic information, but monitoring provides detailed performance trends, alarms, inverter status, energy data, and fault history.

EMS is required to manage solar, battery, grid, generator, and load priority. It ensures the system operates according to the customer’s backup and energy-saving strategy.

Yes. Monitoring can help detect abnormal generation, inverter faults, communication failure, string-level issues, and performance mismatch..

Yes. Apple Energy can provide monitoring dashboards and performance reports according to project requirements.

Microgrid & Hybrid Power Solutions Questions

Microgrid & Hybrid Power Solutions

Hybrid systems combine solar, batteries, grid, and generators. Without proper engineering, the system may face synchronization issues, reverse power problems, load instability, or protection failures.

Yes. A properly designed hybrid system can reduce generator runtime by using solar and battery storage more efficiently.

Yes, if it is designed for island mode operation with proper controls, protection, and energy management.

Load profile, peak demand, critical loads, generator details, transformer rating, grid availability, solar capacity, backup requirement, and operating strategy are required.

Load priority helps decide which loads should continue running during grid failure, battery operation, or limited generation conditions.

Solar RO / Water Treatment Questions

Solar RO / Water Treatment

Water testing is required because RO design depends on raw water TDS, hardness, contamination level, required output quality, and daily water demand.

Yes. Solar RO can be designed for areas where grid electricity is expensive, weak, or unavailable.

The size depends on water quality, required capacity, operating hours, storage requirement, pump load, and solar availability.

Yes. Solar power can reduce electricity cost, especially where RO systems run for long hours during the day.

Yes. Apple Energy can design customized Solar RO and water treatment systems based on site requirements.

Solar Street Lighting / Off-grid Solutions Questions

Solar Street Lighting / Off-grid Solutions

Common reasons include low-quality batteries, poor solar panel sizing, weak charge controllers, wrong pole placement, shading, water damage, or poor installation.

Battery backup depends on lighting hours, wattage, weather conditions, autonomy days, and site requirement.

Yes, but the system must be designed according to load size, surge requirement, inverter capacity, battery backup, and solar charging capacity.

General Inquiry Questions

General Inquiry

Apple Energy reviews the site condition, load requirement, energy usage, available space, budget, backup need, and long-term operation requirement before recommending a solution.

Yes. A site survey can be arranged to check feasibility, equipment placement, structure condition, cable routes, safety requirements, and project scope.

Yes. Apple Energy can inspect, troubleshoot, maintain, clean, monitor, or upgrade existing solar and energy systems.

Yes. Apple Energy provides customized solutions for Solar PV EPC, BESS, O&M, robotic cleaning, chemical cleaning, monitoring, EMS, SCADA, microgrid, Solar RO, and off-grid systems.

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