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If you’re thinking about getting solar panels or an electric car, your switchboard is worth checking first. Everything you add to your home’s electrical system connects through it, and older boards often weren’t designed for the extra load.
Some switchboards can take solar and an EV charger without any changes. Many older ones can’t. Here’s how to tell the difference, and what you might need before the new work goes in.
Quick Answer:
- Older switchboards often need upgrading before solar or an EV charger can be installed, especially boards with ceramic fuses or no safety switches.
- A switchboard for solar needs space for a dedicated solar circuit, a solar main switch and the correct labelling.
- An EV charger draws a lot of power for hours at a time, so it needs its own circuit and the right safety switch protection.
- In some homes, the power supply also needs upgrading, not just the switchboard.
Why Older Switchboards Can Struggle
Homes use a lot more electricity than they did 30 or 40 years ago. Air conditioners, induction cooktops and home offices all add to the load. Solar and EV charging add even more.
Older switchboards tend to have a few common problems. They often use ceramic fuses rather than circuit breakers, and many have few or no safety switches. A lot of them don’t have room for new circuits either.
Some older boards are also mounted on backing panels that contain asbestos. Electricians generally won’t add new work to these, so the board has to be replaced first.
What are the Solar Switchboard Requirements?
Your solar inverter connects to your switchboard. That’s how the power from your panels gets used in your home or sent back to the grid.
To connect solar safely, your switchboard needs:
- space for a dedicated solar circuit
- a solar main switch, so the system can be turned off quickly
- clear labelling showing there’s a second power source on the board
- safety switches and circuit breakers that meet the current Wiring Rules
- a board in good, safe condition
These are the main solar switchboard requirements. If your board doesn’t meet them, your solar installer will usually tell you when they quote. It helps to know this early, so the cost of the upgrade is included from the start.
Signs your board may not be suitable include ceramic fuses, a board with no spare space, an asbestos backing panel, and scorch marks, buzzing or regular tripping. In any of these cases, a new switchboard for solar is usually the first step. If you might add a battery later, it’s worth leaving room for it on the new board now.
Do You Need a Switchboard Upgrade for an EV Charger?
In a lot of homes, yes. A switchboard upgrade for an EV charger is one of the most common jobs we do for people buying their first electric car.
You can charge an EV from a normal power point, but it’s slow. A home wall charger is much faster. A typical 7kW charger draws around 32 amps and can run at that level for several hours, often overnight.
To handle that safely, your switchboard needs:
- room for a dedicated circuit just for the charger
- the correct type of safety switch protection for EV charging
- enough capacity to run the charger alongside your heating, oven and hot water
If your board can’t do all three, a switchboard upgrade for an EV charger will sort it out. It means the charger runs safely without overloading your other circuits.
When Your Power Supply Is the Limit
Sometimes the switchboard isn’t the problem. The issue is how much power is coming into the house.
Most Melbourne homes have single-phase power. That’s fine for everyday use, but it can be stretched once you add a fast EV charger, ducted heating and solar.
There are two main ways to fix this. Our power upgrades can increase your home’s supply, for example by moving from single-phase to three-phase power. The other option is a smart charger with load management, which slows charging when the rest of the house is using a lot of power. We can explain which option suits your home and budget.
Get Your Switchboard Checked First
If you’re getting solar quotes or planning to buy an EV, it’s a good idea to have your switchboard checked early. You’ll know the full cost upfront and avoid delays on installation day.
Our licensed electricians at O’Shea Electrical can look at your current board and tell you whether it’s ready for solar or an EV charger. If it isn’t, our switchboard upgrades will give you a new board set up for what you’re adding now and anything you add later. You’ll get a Certificate of Electrical Safety once the work is done.
Get in touch with the team on 03 9070 9977 to book an assessment.
