Fundraising Fox

Proper Voltage

Carlsbad, US · Delaware corporation · 1 known investors

propervoltage.com ↗

Proper Voltage develops control and integration technology that regulates voltage across the state of charge, allowing advanced batteries to operate in existing power systems without inverter redesign or recertification. It designs and delivers battery systems for critical power and UPS environments, as well as defense and commercial applications.

CleantechEnergyHardwarein /propervoltage

Founders & leadership

CW
Charles WelchExecutive Officer, Director
DF
David FelzerExecutive Officer, Director
CB
Craige BerteroDirector
GS
Gregory SlawsonExecutive Officer

Investors · 1

Commonweal VenturesNew York · $500K – $2.5M

Reported raises · per SEC filings

Form D private placements
▶$6.5MraisedMay 2026 · 19 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Craige BerteroDirector
  • Charles WelchExecutive Officer, Director
  • Gregory SlawsonExecutive Officer
  • David FelzerExecutive Officer, Director
Offering amount
$10M
Amount sold
$6.5M
First sale
May 2026
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$18.5MraisedMay 2026 · 42 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Charles WelchExecutive Officer, Director
  • David FelzerExecutive Officer, Director
  • Craige BerteroDirector
  • Gregory SlawsonExecutive Officer
Offering amount
$18.5M
Amount sold
$18.5M
First sale
Feb 2019
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.