Trailer-based solar power food refrigeration and freezing system

A method for automating a power system for trailer-based food refrigeration and freezing system, said method comprising:

• providing a power system, at least one refrigeration and freezer unit that generates an electrical load on the power system, a solar power system, wherein the solar power system provides power to the power system from a first battery, and a propane standby generator that provides the additional power to the power system when it receives the signal from the solar power system;
• activating the solar power system;
• charging the first battery with the electricity from the solar power system;
• drawing power from the first battery to operate the at least one refrigeration and freezer unit;
• and powering up the propane standby generator when additional power is needed to charge the first battery so that the first battery is not depleted;
• providing a startup control procedure for the refrigeration and freezer units that prevents an overload of the power system;
• determining the initial startup delay so that a compressor has time to bleed off at least a portion of high pressure;
• determining a staggered delay so that there is sufficient time between the powering up of each of the refrigeration and freezer units;
• programming a unit start time for each of the refrigeration and freezer units;
• activating the startup control procedure;
• and providing power to each of the refrigeration and freezer units as each of the unit start times is reached.

A method for automating a power system for trailer-based food refrigeration and freezing system, said method comprising:

• providing a power system, at least one refrigeration and freezer unit that generates an electrical load on the power system, a solar power system, wherein the solar power system provides power to the power system from a first battery, and a propane standby generator that provides the additional power to the power system when it receives the signal from the solar power system;
• activating the solar power system;
• charging the first battery with the electricity from the solar power system;
• drawing power from the first battery to operate the at least one refrigeration and freezer unit;
• powering up the propane standby generator when additional power is needed to charge the first battery so that the first battery is not depleted;
• providing a startup control procedure for the refrigeration and freezer units that prevents an overload of the power system;
• determining the initial startup delay so that a compressor has time to bleed off at least a portion of high pressure;
• determining a staggered delay so that there is sufficient time between the powering up of each of the refrigeration and freezer units;
• activating the startup control procedure;
• waiting until expiration of the initial startup delay so that a compressor has time to bleed off at least a portion of high pressure;
• providing power to a refrigeration and freezer unit and 1) determining when a power draw of the unit is below a minimum power threshold, then 2) withdrawing power and waiting for a preprogrammed interval of time when the power draw of the unit is above the minimum power threshold and repeating steps 1) and 2) until the power draw of the unit is below the minimum power threshold, and then allowing the unit to complete powering up;
• and determining when all of the refrigeration and freezer units have power and terminating the startup control procedure when they do, but waiting until expiration of a staggered delay when they do not and then repeating the steps of providing power to a refrigeration and freezer unit until all of the units are powered up.