1.6 Precautions for Using Inverters
1-23
Chapter 1 BEFORE USE
1.6.2 Storage environment
[1] Temporary storage
Store the inverter in an environment that satisfies the requirements listed below.
Table 1.6-3 Storage and Transport Environments
Item Specifications
Storage temperature
(Note 1)
-25 to +70°C
Relative humidity 5 to 95% (Note 2)
Places not subjected to abrupt temperature changes
or condensation or freezing
Ambience
The inverter must not be exposed to dust, direct sunlight, corrosive or
flammable gases, oil mist, vapor, water drops or vibration.
The atmosphere can contain only a small amount of salt. (0.01 mg/cm
2
or less
per year)
86 to 106 kPa (during storage) Air pressure
70 to 106 kPa (during transportation)
Note 1) The indicated storage temperature range assumes storage over a relatively short
time period, such as during transportation.
Note 2) Even if humidity is within the specified requirements, avoid places where the
inverter will be subjected to sudden changes in temperature that will cause
condensation to form.
Precautions for temporary storage
(1) Do not leave the inverter directly on the floor.
(2) If the environment does not satisfy the specified requirements listed in Table 1.6-3, wrap the inverter
in an airtight vinyl sheet or the like for storage.
(3) If the inverter is to be stored in a high-humidity environment, put a drying agent (such as silica gel) in
the airtight package.
[2] Long-term storage
If you will not use the unit for a long time after purchase, store it in a following manner.
(1) The storage site must satisfy the requirements specified for temporary storage.
However, for storage exceeding three months, the surrounding temperature range should be within
the range from -10 to 30°C. This is to prevent electrolytic capacitors in the inverter from deterioration.
(2) The package must be airtight to protect the inverter from moisture. Add a drying agent inside the
package to maintain the relative humidity inside the package within 70%.
(3) If the inverter has been installed to the equipment or panel at construction sites where it may be
subjected to humidity, dust or dirt, then temporarily remove the inverter and store it in the
environment specified in Table 1.6-3.
Precautions for storage over 1 year
If the inverter has not been powered on for a long time, the property of the electrolytic capacitors may
deteriorate. Power the inverters on once a year and keep the inverters powering on for 30 to 60 minutes.
Do not connect the inverters to the load circuit (secondary side) or run the inverter.
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