Spain PV-Storage System — 30kW PV + 86kWh Storage

Project overview

In Spain, a photovoltaic storage system was deployed in off-grid standby mode. The case record describes the operating rule: PV supplies the load first, with the ESS charging during surplus generation. Below a 10% battery threshold the system stops discharging in standby mode. The record also reserves a grid-connected hybrid mode with backflow prevention on the AC input side.

Applications at this site

• Off-grid standby power
• PV-first load supply with surplus storage
• Reserved grid-connected hybrid mode with backflow prevention

Installed capacity

• PV system power: 30 kW total as stated in the case record (1 × 30 kW PV inverter + 9 × 550W panels)
• Energy storage capacity: 86 kWh
• Enclosure: high-voltage enclosure for battery and inverter

Project advantages

• Standby readiness: off-grid standby mode with a defined 10% discharge threshold.
• PV-first logic: load supplied from PV before battery discharge.
• Grid option reserved: grid-connected hybrid mode with backflow prevention is reserved in the record, not verified as active.