IET Systems Resources

IET Brochures

Security Industry Math Formulas

  • Click here to visit IET's Security Industry Math Formula Reference online.
  • Click here to download IET's Security Industry Math Formula Reference (PDF).

Solar Information

  • GAISMA - Gaisma website provides sunrise, sunset, dusk and dawn times for thousands of locations all over the world. Sun data is shown in table format for selected dates and as a graph for the whole year. Possible daylight saving times are taken into account.
  • NOAA Solar Calculator - Find sunrise, sunset, solar noon and solar position for any place on Earth.
  • Solar Insolation Map - Map of U.S. Typical Winter Peak Sun Hours (PDF).
  • MK Battery Technical Manual - Technical manual for MK Battery Sealed Valve Regulated (SVR) Gelled Electrolyte Lead-Acid Batteries (PDF).