Scope of work
Site survey and load assessment, design of a hybrid system combining an existing LG 310 Wp array with new JA Solar 550 Wp modules, supply and installation of a Solis 5 kW inverter and a Victron 3 kVA inverter/charger with a 2.5 kWh battery, DC/AC protection and earthing, testing and commissioning, and handover with user training.
About this project
This project expanded an existing rooftop solar system at a home in Welmilla into a hybrid installation with battery backup, lowering electricity bills and keeping essential loads running during power cuts.
System
- 5 × LG 310 Wp modules (existing) and 4 × JA Solar 550 Wp modules (new) – 3.75 kWp in total
- Solis 5 kW inverter
- Victron 3 kW inverter/charger for backup supply
- 2.5 kWh lithium battery
What we delivered
- Load assessment and design to integrate the two module types safely, on separate strings matched to the inverter inputs
- Roof-mounted array with corrosion-resistant mounting
- DC and AC protection, surge protection, and earthing
- Testing, commissioning and handover with monitoring setup
Services involved
Solar PV & BESS
Testing & Commissioning
Solar PV & BESS
- Installation type
- Rooftop
- Number of modules
- 54
- Module make
- LG, JA Solar
- Module rating
- 310,550 Wp
- Inverter make
- Solis, Victron
- Inverter capacity
- 53 kW
- Battery chemistry
- LFP (lithium iron phosphate)
- Estimated annual generation
- 5.1 MWh/yr
- Grid connection scheme
- Net metering
- 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 tests: visual inspection, string Voc and polarity (LG and JA strings), insulation resistance, earth continuity, Solis grid and anti-islanding checks, Victron and battery functional tests, and backup changeover test.
- Utility handover (EDL/LECO)
- Yes
