SSP Electrical - High-Efficiency Solar + Battery System for Energy Independence in Christchurch
Location: Residential home, Christchurch, New Zealand
Installation Date: December 2025
System Type: Grid-connected hybrid solar PV with battery energy storage system (BESS)
System Overview
This Christchurch family home aimed to slash electricity bills, maximise self-consumption amid rising power prices, and gain resilience against outages. With significant daytime loads (home office, appliances, potential EV charging), the owners selected a premium, high-capacity solar + storage setup using top-tier components for long-term reliability in the region's variable climate.
Key System Components
Solar PV Array: 35 × 505W Suntech monocrystalline panels
Total array capacity: 17.675 kW (DC)
High-efficiency modules with strong low-light performance and low temperature coefficient, well-suited to Christchurch's cooler temperatures and diffuse winter light.
Inverter: Sigenergy (SigenStor) 15 kW three-phase hybrid inverter
Model: Sigen Energy Controller 15.0 TP
Features: High efficiency (up to ~98%), 3–4 MPPT trackers, wide MPPT range, seamless hybrid/backup operation, and intelligent AI-based energy management for optimal charging/discharging.
Supports high DC/AC oversizing ratio for excellent yield in variable conditions.
Battery Storage: 2 × Sigenergy SigenStor 10 kWh battery modules
Additional Component: Sigenergy Energy Gateway (three-phase model)
Provides smart whole-home monitoring via mySigen app, rapid seamless backup transfer (<20 ms), time-of-use optimisation, grid interaction, and enhanced energy flow control.
Expected Performance & Benefits
Annual Solar Generation Estimate: Approximately 19,400–23,000 kWh
Self-Consumption Rate: Projected 75–90% with substantial battery storage, far exceeding solar-only systems.
Energy Bill Savings: Major reduction in grid imports (especially evenings/winter), with payback typically 5–8 years depending on usage, tariffs, and export credits.
Backup Capability: Whole-home Back up during power cuts, with fast islanding via the Gateway.
Future-Proofing: Modular batteries allow stacking more capacity; Sigenergy's AI EMS adapts to weather forecasts, tariffs, and household patterns for ongoing optimisation.
Client Feedback:
"The larger array and batteries have made a huge difference here in Christchurch – we cover most of our needs even on shorter winter days, and the backup gives real peace of mind during storms. The app is easy to use, and imports are minimal now. Great setup for Canterbury homes."
