Completed GJS solar installation on a Cape Town roof

GJS Insights

Energy and electrical insight for Cape Town properties.

Research-led articles for homeowners, businesses and property teams who want practical context before making electrical and solar decisions.

Cape Town home with rooftop solar panels installed at Spartikus Estate
Featured Insight

Cape Town Electricity Tariffs Changed on 1 July 2026. Here Is What Homeowners Should Understand.

Cape Town’s 2026/27 electricity tariff increase is smaller than many households have seen in recent years, but it still forms part of a longer conversation about how homes manage electricity costs.

7 min read
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Electrical protection board with labelled breakers and surge protection
Fault finding

Why Does My DB Board Keep Tripping?

A breaker that keeps tripping is doing a job. The important part is finding out whether the cause is the load, an appliance or a fault in the installation.

8 min read
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GJS electrician inspecting a residential electrical installation for compliance
Compliance

What Is an Electrical COC and When Do You Need One?

A Certificate of Compliance records that an electrical installation was inspected, tested and found compliant at the time it was issued.

9 min read
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Three-phase main switchgear and colour-coded supply cables
Electrical planning

Single Phase vs Three Phase Power: What Homeowners Should Know

Most homes run comfortably on single phase. Three phase becomes relevant when the property has larger loads or needs power distributed differently.

8 min read
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Inverter and battery equipment installed for the R-Labs solar project
Solar and backup

Inverter, Battery and Solar: What Size System Do You Actually Need?

System size starts with the loads you need to run, how long they must run and how much energy the property uses through a normal day.

10 min read
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GJS electrician testing wiring during a Cape Town residential build
Projects

Common Electrical Problems in New Builds and Renovations

Most expensive electrical corrections begin as small planning decisions made before the ceilings close and the finishes go in.

9 min read
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Modern main distribution board with labelled breakers and metering
Electrical maintenance

How to Know When Your DB Board Needs an Upgrade

A DB board upgrade is not about making the board look newer. It is about protection, condition, capacity and whether the installation still suits the property.

8 min read
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Solar planning

Estimate the effect of solar on your electricity bill.

The GJS Solar Savings Calculator gives a practical starting point before a site assessment.

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