10 solar panels mounted on a corrugated roof at a house in Piliyandala

5.5 kWp Hybrid Solar PV with 10 kWh Battery – Residence, Piliyandala

Solar PV & BESS – EPC Testing & Commissioning

Rooftop hybrid solar system in Piliyandala with 10 kWh battery storage, lowering the home's electricity bills and providing backup power during outages.

Client sector: Residential
Location: Piliyandala, Colombo District
Year completed: 2024
Duration: 3 days

Scope of work

Site survey and load assessment, system design, supply and installation of 10 × 550 Wp JA Solar modules, a Solis 5 kW hybrid inverter and a BSLBATT 10 kWh lithium battery, DC/AC protection and earthing, testing and commissioning, utility net-metering support, and handover with user training.

Solar PV & BESS – EPC

Installed capacity: 5.5 kWp
System type: Hybrid
Battery capacity: 10 kWh
CO₂ saved per year: 2.5 t/yr
Installation type: Rooftop
Number of modules: 10
Module make: JA Solar
Module rating: 550 Wp
Inverter make: Solis
Inverter capacity: 5 kW
Battery chemistry: LFP (lithium iron phosphate)
Estimated annual generation: 7.5 MWh/yr
Grid connection scheme: Net accounting
Monitoring system: Yes

Testing & Commissioning

Equipment tested: Switchgear / panels, Cables, PV systems, Batteries / UPS
Voltage levels: LV (400/230 V)
Tests performed: IEC 62446-1 commissioning tests: visual inspection, string Voc and polarity, insulation resistance, earth continuity, inverter and battery functional tests, anti-islanding, and backup changeover test.
Utility handover (EDL/LECO): Yes

This residential project in Piliyandala combines rooftop solar with battery storage to reduce electricity costs and keep essential loads running during power cuts.

System

10 × JA Solar 550 Wp monocrystalline modules (5.5 kWp)
Solis 5 kW hybrid inverter
BSLBATT 10 kWh lithium iron phosphate (LFP) battery

What we delivered

Load assessment and system sizing for the household's daily use
Roof-mounted array with corrosion-resistant mounting
DC and AC protection, surge protection, and earthing
Testing, commissioning, and handover with app-based monitoring

The battery stores surplus daytime solar energy for evening use and provides backup during outages, while the grid supplies any shortfall.

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