01 / Load profileBegin with essential loads, not a package name.
List every load that must operate during an outage, its running power, daily operating hours and starting surge. Refrigerators, pumps, air conditioners and workshop motors can require much more power for a short period during startup.
Power determines inverter size
Add the loads that may run at the same time, then check the largest starting surge.
Energy determines battery size
Multiply each essential load by its expected operating hours to estimate daily and backup energy.
Country, grid and climate change the design.
Confirm nominal voltage, frequency, single- or three-phase supply, grid availability and generator use. Installation temperature, dust, humidity, altitude and ventilation can affect equipment selection and output.
Weak or unstable grid
Confirm the acceptable AC input range, charging strategy and transfer behavior.
Remote off-grid site
Plan for seasonal solar variation, generator support, spares and service access.
Hot environment
Follow product derating, shading, ventilation and battery-room requirements.
Match the operating mode to the site.
A grid-supported hybrid system can coordinate solar, battery and utility power. A fully off-grid system must balance generation and storage without depending on the utility. Commercial sites may also require demand management, three-phase output and dedicated protection.
Home backup
Prioritize essential circuits and define the required outage duration.
Shop or clinic
Separate critical loads from discretionary loads and allow for daytime activity.
Commercial project
Use measured interval data where possible and coordinate switchgear, protection and controls.
Check the complete system as one design.
Before ordering, verify PV voltage and current limits, battery voltage and communication, inverter output, cable and protection requirements, generator compatibility, expansion limits and local installation standards.
Recommended project inputs
Destination country, load list, backup hours, phase and voltage, available roof or ground area, generator details and future expansion.
Factory proposal output
A matched inverter, battery and PV configuration for final confirmation by the buyer and qualified local installer.