Sigenergy SigenStor for installers: design, battery and backup
Professional guide to define the architecture, prepare system sizing and avoid common mistakes before quoting or commissioning a SigenStor system.
What must be defined before choosing SigenStor?
SigenStor must be selected as a complete system: generation, conversion power, battery capacity, metering, communications, energy strategy and, where required, backup. Choosing only by battery kWh can lead to a solution that is incompatible with the loads, grid or expected autonomy.
Plug & Play Energy supplies Sigenergy solutions to installers and engineering firms in Spain and Iberia and supports equipment selection using real project data.
Minimum data required for system sizing
- At least twelve months of consumption and, where possible, hourly or quarter-hourly data.
- Power, phases, voltage, tariff and connection-point limits.
- Existing or planned PV: power, inverters, orientation and production.
- Main objective: self-consumption, tariff optimisation, peak shaving, backup or a combination.
- Critical loads, simultaneous power, peaks and starting currents.
- Target autonomy and minimum battery reserve during an outage.
- Single-line diagram, meter or CT location and equipment included in the energy balance.
- Installation conditions, communications and possible generator integration.
Power and energy are not the same
Power in kW determines which loads the system can supply at any moment. Energy in kWh determines for how long. The load profile, peaks, PV production and reserve strategy must be assessed together; an annual bill only supports an initial estimate.
A battery does not guarantee backup
Backup requires compatible hardware and architecture, grid detection, switching, an SOC reserve and a correctly defined critical-load board. Starting power and simultaneity must also be checked. It must not be assumed that the entire installation will remain supplied during an outage.
Checks before commissioning
- Confirm models, references, firmware and compatibility of all components.
- Validate wiring, protection devices, phases, direction and meter or CT ratio.
- Check local communication before diagnosing cloud connectivity or mySigen.
- Configure limits, strategy, reserve and export control according to the project and regulations.
- Test metering, charging, discharging, production and backup without deleting events or settings.
Sigenergy diagnostics by symptom
Answers should only be applied when the model, firmware, architecture, meter and grid type match. Always preserve events and settings before intervening.
SigenStor or SigenStack
SigenStor is aimed at integrated residential and commercial architectures, while SigenStack addresses C&I projects requiring a specific modular configuration. The choice must not be based on nominal capacity alone: power, topology, backup, operation, growth and connection-point requirements must be compared.
View SigenStack C&I guideFrequently asked questions about SigenStor
Can SigenStor be sized using only an electricity bill?
A bill supports an initial estimate but does not show simultaneity, peaks or hourly distribution. A reliable proposal requires the load profile and the project electrical data.
Does having a battery mean backup is available?
No. Backup depends on compatible hardware, switching, a critical-load board, reserve and available power. It must be specifically designed and tested.
Why can mySigen appear offline while the system is producing?
Local operation and data transmission are separate functions. Local communication, router, internet, gateway and last contact should be checked before changing the plant.
What information does PnP need to review a project?
Consumption and load profile, power and phases, PV, storage objective, backup loads, autonomy, single-line diagram, metering, location and existing equipment.
Sigenergy resources for professionals
Review equipment, support resources and documented projects before finalising the architecture.
Author: Plug & Play Energy Technical Service Team. Technical review: Arturo Andrés. Compatibility, firmware, regulations and commissioning must always be checked against the current documentation for the exact model.