Philippine solar learning hub
Solar battery and brownout planning
A battery should be sized from the appliances that must stay on, their combined running and surge power, the required outage duration, usable depth of discharge, conversion losses, and a reserve margin.
Direct answers to the main questions
Does grid-tied solar work during a brownout?
A standard grid-tied inverter normally shuts down when the grid fails. Backup requires compatible equipment, isolation, storage or another supported source, and a designed backup circuit.
Should every appliance be backed up?
Usually no. Prioritize communications, lighting, fans, refrigeration, medical needs, pumps, and work equipment, then verify surge requirements.
Battery or generator?
The decision depends on outage duration, noise, fuel access, maintenance, startup behavior, critical loads, and how often outages occur. Some properties use both.
Read the supporting guides
Does solar work during brownouts?
Learn why many solar systems shut down during outages and what is required for backup power.
Read the guideBattery sizing for backup
Estimate runtime, usable capacity, and the real limits of residential battery backup.
Read the guideBackup load prioritization
Decide what should stay on during outages before you overspend on batteries.
Read the guideBattery replacement planning
Budget for the part of hybrid ownership that many sales pitches skip.
Read the guideBattery versus generator backup
Compare silence and convenience with fuel flexibility and lower upfront cost.
Read the guideUse the tools with the same assumptions
Keep bill history, electricity rate, daytime use, shading, target, and equipment assumptions consistent. Changing one input between tools can make the outputs look contradictory even when each calculation is working as designed.
Inspect the Philippine reference data
See which utility periods and solar-yield ranges support the planning defaults, where coverage is limited, and when a manual override is more appropriate.
Open the data explorerSources, scope, and limits
This hub organizes educational content and does not replace a site survey, electrical design, structural review, current utility confirmation, or a complete written quotation.