Project Overview: Solar Storage Retrofit for a Nairobi Commercial Residence
Location: Nairobi, Kenya | Date: Q4 2024
Capacity: 10.2KW Solar Energy Storage System | Application: Residential/Commercial Hybrid Use
A mixed-use property in Nairobi deployed a 10.2KW solar energy storage system to slash electricity costs and provide backup power during Kenya's load-shedding events.
The Anern system integrates solar generation with lithium battery storage for seamless daytime grid displacement and overnight backup, serving both ground-floor retail and upstairs residential loads.
The Property Owner's Challenge: Dual-Tariff Load Management & Load-Shedding
Nairobi's commercial tariff structure penalises peak-hour consumption between 5 PM and 9 PM, and Kenya Power's load-shedding schedule causes 2-3 unplanned outages per week.
The property owner needed a single solar storage system capable of serving both the pharmacy's 8 AM-8 PM commercial loads and the apartments' evening residential demand, while automatically islanding during grid failures.
The contractor also had to navigate Kenya's EPRA compliance requirements for grid-tied systems with battery backup, demanding pre-certified components and complete regulatory documentation.
The Anern Solution: 10.2KW Hybrid Solar Storage for Mixed-Use Properties
Anern supplied a 10.2KW solar energy storage system built around a hybrid inverter and 10kWh wall-mounted solar battery technology for the commercial loads, supplemented by 5kWh LiFePO4 battery modules for the residential circuits.
The system connects to 24x 455W PV panels on the property's flat concrete roof and is wired for off-grid hybrid solar system operation with automatic grid disconnection per EPRA requirements.
The energy storage design incorporates 12kW residential solar system architecture principles scaled to optimise the day/night load split between commercial and residential usage.
Hybrid System Configuration & Dual-Load Management
The hybrid inverter prioritises solar power to the pharmacy's base load during daylight hours, with excess generation charging the battery bank.
The bank employs 51.2V wall-mounted lithium solar battery modules totalling 20kWh for the commercial circuit and additional LiFePO4 battery units for the residential backup circuit.
During grid outages, the system automatically switches to island mode within 20 milliseconds, powering critical pharmacy refrigeration and apartment lighting simultaneously.
Key B2B Benefits & Project Impact
- Peak-Shaving Savings: Solar generation offsets 100% of daytime commercial consumption, reducing peak-hour grid draw by 72% and lowering the monthly bill by 58%
- Medical-Grade Backup: Automatic 20ms islanding ensures pharmacy refrigeration stays powered through grid outages, protecting $15,000+ in vaccine and medicine inventory
- Dual-Tariff Optimisation: Battery discharge covers evening commercial loads during peak tariff hours, shifting consumption to off-peak rates automatically
- EPRA-Compliant Design: Pre-certified components and complete compliance documentation reduced regulatory approval from 8 weeks to just 12 days
