You’ve just ordered your EV, eyeing solar panels, or preparing to install a home battery system. Smart move—but if you haven’t checked your panel’s capacity first, you’re stepping into a safety and compliance minefield.
At Santiban Services Group, we start every project with a comprehensive load calculation.
It’s not just smart—it’s mandatory. And skipping it can result in:
Most residential breakers (e.g., 150A) aren’t rated for continuous 100% load—they’re typically 80% rated, meaning they can be loaded safely up to 120A continuous.
In simple terms: a 150A panel can only safely handle 120A of steady draw—not the full 150A— unless all components permit 100% loading.
1.Existing demands—HVAC, fridge, dryer, lighting, outlets
2. New additions—EV chargers, solar inverters, battery systems
3. Continuous loads—like EV charging counted at 48–80A for 3+ hours
4. Safety buffer for future expansion
The result determines if your panel can handle the load—or if you need smarter solutions like load managers (Tesla DPM, DCC-12, Emporia) or a panel upgrade.
A 150A panel with a 48A EV charger, HVAC, fridge, and laundry can easily exceed 120A. Thatmight not trip your breaker immediately—but it creates heat build-up that degrades insulation and can lead to arcing or fires.
One homeowner had a scorching incident on their main lugs due tocontinuous electrical stress.
A certified Santiban load calculation prevented a potential disaster—just in time.
• NEC-compliant load calcs per NEC Article 220
• Use of 125% factor for continuous loads (210.20(A))
• Load balancing with Tesla DPM or Emporia load managers when needed
• Permits, inspections, and documentation ensuring eligibility for tax credits
• Work backed by $1M+ insurance aggregate and licensed Tesla certification
Looking to reduce your cost by 30% with federal incentives (25C or 25D)? You’ll need:
• A permitted project
• Completed load calculation included
• NEC-compliant install by certified electricians
Skipping the calc or cutting corners could disqualify your tax credit and void warranties or insurance coverage.
It takes time, training, and trust in the process. But if you’re offered a cheap quote without one, it might be a ticking time bomb. NEC and local regulators hold contractors liable for unsafe installs—so hiring someone who skips load calculations is a risk you don’t want to take.
Powering your EV or home with solar? Let’s start smart:
Schedule your Load Calculation & System Planning
Or learn more about our services at www.santibanservicesgroup.com
• Real safety, not guesswork
• NEC 2023-compliant installations
• Full insurance protection
• Eligibility for maximum tax incentives
Let’s future-proof your home the right way.
© 2025 Developed by VinSunTech
