At CS Electrical & Renewables, we were contacted by a homeowner in St Stephen experiencing a low RISO fault that prevented their solar inverter from generating energy. What began as a fault-finding visit became a full solar PV repair and MyEnergi Libbi battery retrofit, transforming the system into a safer, more efficient, and future-proof energy solution.
Upon inspection, we identified multiple issues with the original Feed-in Tariff (FIT) solar installation, particularly on the DC side. Roof access was required, so scaffolding was arranged to safely assess the system.
Poorly crimped MC4 connectors
Connectors resting on roof tiles in water and debris
Cabling not secured to mounting rails
Insulation fault causing inverter shutdown
After removing the bottom row of panels, we immediately located the problem.
We carried out the following corrective work:
Re-terminated and correctly crimped MC4 connectors
Secured cabling to mounting rails
Cleaned and protected connections from moisture
Reinstalled PV modules
Post-repair testing showed clear insulation readings, and the system resumed normal energy production.
The client was interested in adding battery storage, so we installed a 3.68kW MyEnergi Libbi with 2 × 5.12kWh battery modules, providing cost-effective energy storage for excess solar generation.
Stores surplus solar energy for evening use
Reduces reliance on grid electricity
Improves return on existing solar investment
Budget-friendly upgrade for FIT systems
The MyEnergi Libbi’s dual MPPT inputs allowed us to split the solar array into two strings, improving performance compared to the original inverter and optimising generation throughout the day.
The original inverter was located in a loft void, making maintenance difficult. We relocated the new system to the client’s garage, providing:
Easier access for servicing
Improved safety
Better system monitoring
We installed an RCD-protected double socket to the left of the inverter, providing up to 3kW of backup power during grid outages.
Operates from solar or battery (if charged)
Keeps essential devices running
Cost-effective alternative to full home backup systems
Ideal for short power cuts
With careful energy management, the system can continue operating even when the grid is unavailable.
“Chris was very personable, explained clearly what was needed and answered questions honestly. The workmanship was first class. Communication was excellent — always punctual and kept me informed. A company that truly provides first-class customer service. I would not hesitate to recommend CS Electrical.”
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Solar PV fault finding & repairs
MyEnergi Libbi battery installations
FIT system upgrades
Backup power solutions
Professional, tidy installations
Contact CS Electrical today to:
Repair or upgrade your solar PV system
Add battery storage to maximise savings
Improve energy independence
Lower your carbon footprint
We’re available via email, phone, or message and look forward to helping with your renewable energy journey.
