Purchasing used renewable energy equipment can be a cost-effective way to expand or repair a system. However, buying second-hand inverters or batteries carries risks if you don’t know what to look for.
Used components can:
Reduce upgrade costs
Replace discontinued models
Provide spare parts for repairs
Extend the life of an existing system
But condition and history are critical.
When purchasing used renewable equipment, always consider:
How long was the unit installed? Was it removed due to upgrade or fault?
Check for corrosion, overheating marks, water damage, or swelling (especially in batteries).
Ensure the unit is compatible with your system version and software.
Has the unit been tested? Is any warranty offered?
Common issues with unverified used equipment include:
Hidden internal faults
Reduced efficiency
Shortened lifespan
Communication errors
No manufacturer support
Buying purely on price can lead to higher costs later.
South West Renewables now supplies Fogstar Energy LiFePO4 batteries, with a growing range of 5.12kWh, 10kWh and 16.1kWh energy storage solutions for residential, commercial and off-grid systems.
When an inverter develops a fault, replacing the entire unit isn’t always necessary. In many cases, individual parts can be replaced, helping to extend the working life of existing renewable energy equipment.
Not sure which solar inverter brand is right for your system? Learn how SMA, Fronius, SolarEdge, Growatt, Solis, SolaX, Huawei and Victron compare.
