The Hidden Costs and Rewards of Long-Term Solar Ownership
When most businesses invest in solar energy, they look at the upfront cost, the payback period, and the immediate monthly savings. And that makes sense. In South Africa, where electricity costs climb by double digits annually, switching to solar is one of the most effective ways to reduce operational expenses.
But what happens after you hit that golden milestone – year five?
If you’re a solar owner, or planning to become one, understanding what comes next can mean the difference between exponential savings and quietly losing value from your system. This is where long-term solar ownership becomes less about installation, and more about intelligent asset management.
Solar Isn’t “Set and Forget”
Solar panels are often advertised to last 20 to 25 years, and they do. But expecting year-one performance at year ten without intervention is like buying a vehicle and never servicing it.
Here’s what business owners need to consider:
1. System Degradation
Most panels lose 0.5% to 0.7% of their efficiency per year. That’s manageable, but only if your system is operating optimally. Dirty panels, ageing connectors, or shading that wasn’t present at install time can accelerate underperformance.
2. Component Lifespan
Inverters typically have a lifespan of 8–10 years. Batteries could also last 8 – 10 years, depending on the chemistry and use case, but some may need replacement sooner. Many businesses are unaware that component warranties and expected lifespans differ. If not budgeted for, these replacements can impact ROI.
3. Firmware & Software Updates
Modern systems come with smart inverters, cloud-based monitoring, and even grid export functionalities. However, these features need occasional firmware updates and system recalibrations to stay efficient and compliant with regulations.
4. Changing Energy Loads
Your business has probably evolved in the past five years. Maybe you added machinery, expanded working hours, or even bought an EV fleet. Is your solar system still sized correctly for your current load profile? If not, you could be losing out on performance or overpaying for peak-time usage.
The Risk of Running Blind
We’ve seen hundreds of systems installed by third parties that simply don’t live up to their promise. Some are unsafe. Many are inefficient. Nearly all show signs of neglect.
That’s why we developed the AWPower 60-Point Solar System Audit, designed using insurance industry guidelines (we’re a SANTAM-approved partner). It is more than checking if the panels still work… the following is also important:
- Verifying electrical safety and compliance
- Checking for inverter or battery warning signs
- Assessing wiring, fuses, and connectors for wear
- Solar panels – risk of theft, risk of fire, efficiency & safety
- Confirming documentation: COC, SSEG, warranties
- Analysing system settings for export-readiness and efficiency
- Scoring the system’s performance across 9 categories
Many businesses don’t realise: if your system hasn’t been maintained or audited, your insurance claim could be denied in case of a fire or failure.
What About Long-Term Savings?
The good news is: well-maintained systems actually over-deliver. Especially when paired with smart upgrades like:
- Load shifting (timing heavy-use devices for solar hours)
- Exporting excess to the grid (where allowed)
- Adding EV charging to self-consume more solar
- Expanding your array as prices drop
As an example, one of our customers in the Western Cape upgraded their inverter in year six of their installation, added two EV chargers, and optimised their settings. Their monthly savings jumped by 27% compared to the previous year.
This is what smart solar ownership looks like.
What Should You Do Now?
If it’s been more than 18 months since your last system check, or if you’ve never had one, schedule an audit. Whether we installed your system or not, our team is trained to provide:
- A full performance and safety review
- Guidance on exporting and load-shifting strategies
- Firmware updates and system recalibrations
- Advice on battery and inverter upgrades
We also offer a SolarSupport service which includes an on-site system audit at the start of your subscription for systems not being installed by AWPower. For many clients, this audit alone uncovered savings opportunities or compliance gaps they didn’t know existed.
In Summary
Solar is a long-term investment, yes, but only if you treat it that way. After the five-year mark, it’s no longer about “going solar” but more about making sure your system works as hard as you do.
Book your AWPower Solar Audit today and future-proof your investment.
Mail us: info@awpower.co.za