Battery Calculator
PCM Thermal Buffer System
More hot water. Same water heater.
Adjust the sliders — results update live at the top of your screen.
Adjust parameters on the left and watch the chart and numbers update instantly.
Calculator
Daily Cycle
Recharge
Peak
Recharge
Peak
Recharge
Peak
vs. Conventional
Key Benefits
Thermal Battery
Stores ~6.3 kWh of heat — 5–14× the density of a standard water buffer tank.
Never Runs Cold
118 gal per peak — back-to-back showers, laundry, and dishwashers all run together.
Potable Safety
Fully closed-loop HX — zero PCM contact with drinking water. Code-compliant.
Off-Peak Charging
Load the thermal battery overnight to reduce demand charges.
Drop-In Compatible
Works with any existing water heater, tankless unit, or boiler.
Compact Output
15"×24"×48" delivers what a 200–300 gal conventional buffer would require.
Who It's For
🏠 Residential
🏪 Light Commercial
📊 System Output
Output Comparison
Daily Cycle
A typical day with 3 peak demand events and full recharges between each:
Recharge
~2.5 hrs
118 gal
Recharge
118 gal
Recharge
118 gal
vs. Conventional Heater
| Feature | Conventional Heater | PCM Thermal Buffer System | Advantage |
|---|---|---|---|
| Peak Event Capacity | 40–80 gal (tank only) | ~118 gallons | 4–6× More Output |
| Daily Hot Water | 40–80 gal/day | 285–300 gal/day | Up to 7× Daily Yield |
| Recovery Time | 60–90 minutes | 2.5 hrs full recharge | 3 Full Cycles/Day |
| Peak Demand Handling | Runs out mid-peak | PCM + tank sustains flow | Never Runs Cold |
| Potable Water Safety | Standard / direct | Fully closed-loop HX | Zero PCM Contact |
| Energy Strategy | Always-on heating | Off-peak thermal charging | Lower Demand Charges |
| Energy Density | Baseline (water) | 5–14× higher per volume | Compact Footprint |
| Installation | Standard plumber | Plumber + 240V/20A circuit | Simple Add-On |
| Best Market Fit | 1–3 person home | Families, Airbnb, gyms, salons | Residential & Commercial |
Key Benefits
Thermal Battery Technology
PCM stores ~6.3 kWh of heat — 5–14× the density of a standard water buffer tank.
Never Runs Cold
118 gallons per peak event — back-to-back showers, laundry, and dishwashers all run simultaneously.
Potable Water Safety
Fully closed-loop HX ensures potable water never contacts the PCM. Code-compliant by design.
Off-Peak Charging
Charge the thermal battery overnight to reduce energy demand charges and flatten your load profile.
Drop-In Compatible
Works alongside any existing water heater, tankless unit, or boiler. No replacement required.
Compact for Its Output
A 15"×24"×48" tank delivers what would require a 200–300 gal conventional buffer.