How to Read a PCS Specification Sheet (Energy Storage Converter Datasheet)
Summary: A field-by-field breakdown of an energy storage converter datasheet: rated power, on-grid/off-grid transfer time, number of MPPT channels, efficiency, ingress protection rating, and the certificates you should request.
When selecting an energy storage converter (PCS), the specification sheet is the most important basis for comparison. The following fields must be examined carefully.
Rated Power and Overload
Check the continuous power and short-time overload capability (e.g., 110% long-term, 150% for seconds) to match load peaks.
On-Grid/Off-Grid Transfer Time
Only a transfer time <10ms can ensure uninterrupted power for critical loads; for off-grid scenarios, confirm black-start capability.
Efficiency and MPPT
Maximum efficiency (often 98%+) and European efficiency reflect losses; multiple MPPT channels suit strings with different orientations.
Protection and Certificates
Confirm the IP rating and operating temperature range, and request certificates such as CE, IEC 62109, and UN38.3.
Key Points
- On-grid/off-grid transfer time <10ms protects critical loads
- Maximum efficiency often 98%+; check European efficiency
- Multiple MPPT channels suit multiple orientations
- Request CE / IEC 62109 / UN38.3 certificates
