Many homeowners ask: “My house has a 100-amp panel—do I really need to upgrade, or can I just add a subpanel?” At Sunderland Electric, we get this question all the time. The answer depends on your household’s energy use, the age of your system, and your future.
Understanding a 100-Amp Panel
A 100-amp service panel was once standard in many homes. For smaller households without big electric loads, it can still work today. However, modern lifestyles demand more power—think EV chargers, hot tubs, HVAC systems, and kitchen upgrades.
Signs your 100-amp panel might be struggling:
– Breakers trip often.
– No room left for new circuits.
– Lights dim when appliances run.
– You’re planning to add power-hungry systems.
What Does “Splitting Circuits” Mean?
“Splitting circuits” usually means installing a subpanel. A subpanel doesn’t increase your overall amperage—it just provides more breaker space.
A subpanel makes sense if:
– Your 100-amp panel isn’t overloaded.
– You only need extra breaker slots.
– You’re adding circuits for smaller needs, like a garage or workshop.
Example: A 60-amp subpanel can handle lighting, outlets, or tools without requiring a total panel upgrade.
When It’s Time to Upgrade Instead
A full 200-amp panel upgrade may be the better choice if:
– You’re adding high-demand appliances (EV chargers, hot tubs, induction cooktops, HVAC).
– Your home is older, and the wiring doesn’t meet modern safety standards.
– You’ve already maxed out your 100-amp capacity.
– You want future-proofing and better resale value—most buyers today expect 200-amp service.
Cost Comparison
– Subpanel installation: $500–$1,500
– Full 200-amp upgrade: $2,500–$5,000+ (depending on permits, wiring, and utility requirements)
While a subpanel is budget-friendly, it’s only a temporary fix if your home’s total demand exceeds 100 amps.
How to Decide
1. Get a load calculation: Our licensed electricians at Sunderland Electric can measure your home’s true power demand.
2. Review your future needs: Planning to add solar, EV chargers, or new HVAC? An upgrade may be smarter.
3. Think long-term: Subpanels solve today’s space issues, but a full upgrade ensures your home is ready for tomorrow.
If your 100-amp panel is handling your household load but lacks breaker space, a subpanel is a practical solution. But if your energy demands are growing—or will soon—upgrading to a 200-amp panel is the safest, future-proof choice.
At Sunderland Electric, we help homeowners decide the best option for their needs. Our licensed electricians provide reliable panel upgrades, subpanel installations, and load calculations to keep your home safe and efficient.
📞 Call Sunderland Electric today to schedule your panel evaluation!