TL;DR
- Most pre-2010 Mackay homes need a switchboard upgrade before solar/battery/EV.
- Typical residential upgrade: $1,500-$3,500 including RCDs and compliance.
- Asbestos-backed boards are common in Mackay 1970s/80s homes — must be removed safely.
- An upgrade pays itself back through insurance premium reduction and solar capacity.
Why solar often triggers a switchboard upgrade
Adding solar means adding another circuit, another breaker, and in many cases an inverter isolator. An old board with no spare slots, mixed fuse types, or exposed live conductors can't safely accept the new circuits.
Signs your switchboard needs replacing
- Ceramic fuses — rewirable, pre-RCD era. Replace.
- Asbestos-backed panel (grey or cream, flaking). Common in 1960s-1980s Mackay homes.
- No RCD / safety switch — mandatory for new solar installs.
- Main breaker under 63 A — inadequate for modern loads (A/C, EV, solar, battery).
- Mixed / brand-soup breakers — dangerous, non-compliant.
- Heat discolouration or buzzing — active fault, unsafe.
What's included in a typical upgrade
- New enclosure (metal or Schneider Resi9 / Clipsal Max9).
- Main switch 100 A or 125 A single-phase (or three-phase 63 A).
- RCBOs on every circuit (best practice post-AS/NZS 3000:2018).
- Dedicated breakers for solar, battery, EV (as required).
- Surge protection device (Type 2 SPD) — highly recommended for Mackay.
- Electrical certificate of compliance (CoC) and Ergon notification.
Cost bands (2026, Mackay)
| Scenario | Cost band | Notes |
|---|---|---|
| Straightforward residential (non-asbestos) | $1,500-$2,400 | 4-6 hour job |
| Asbestos panel removal | +$500-$900 | Licensed A-class removal |
| Three-phase upgrade (adding phase) | $3,500-$7,500 | Ergon coordination required |
| Commercial 100-200 A switchboard | $5,000-$18,000 | Depends on circuits and meters |
Insurance and resale implications
Modern switchboards reduce the risk of electrical fire and are often a condition of building insurance. Real estate sales are increasingly flagging old boards in B&P reports. A $2-3k upgrade can protect $500k+ of assets and speed up sale.
FAQs
Will I lose power during the upgrade?
Yes, typically 1-2 hours. We coordinate the outage time with you and can leave key circuits (fridge, Wi-Fi) on a temporary feed where practical.
Do I need approval from Ergon?
If the meter box is affected or main switch rating changes, yes. We handle Ergon service request and meter reconfiguration as part of the job.
Can I upgrade the switchboard same day as solar install?
Yes — we often combine them for a single visit. Saves you a callout and reduces total cost.
Switchboard assessment
Free inspection in Mackay. Send a photo for a preliminary quote in 24 hours.
Request assessment