Typical Services Provided By Solaris Power Systems
Battery and Charger Sizing
- This service is always provided for battery system and charger sales. The sizing is based on the time value of the applied loads and the necessary behavior of the recharging cycles, adjusted for defined ECV (End Cell Voltage), operating temperature, design margin, and safety factor on the DC side. On the AC side adjustments are made for inverter efficiency and power factor.
- Battery racks are defined with the battery sizing process based on type of battery, dimensions of storage area, and site specific seismic zone.
- Installation of battery systems and racks, electrical connections, battery charging system, etc.
- An acceptance test of the battery capacity should be made at the manufacturer’s factory or upon initial installation, as determined by the user. The test should meet a specific discharge rate and duration relating to the manufacturer’s rating or to the purchase specification’s requirements.
- A performance test of the battery capacity should be made within the first two years of service. It is desirable for comparison purposes that the performance tests be similar in duration to the battery duty cycle.
- A service test of the battery capability may be required by the user to meet a specific application requirement. This is a test of the battery’s ability, as found, to satisfy the battery duty cycle. A service test should be scheduled at the discretion of the user at periodic times between performance tests. When a service test is also being used on a regular basis it will reflect maintenance practices. When a battery has shown signs of degradation, service testing should be performed on its normal frequency and performance testing should be performed on an annual basis.
Modified performance testing
- A modified performance test is a test of battery capacity using a constant current, modified by increasing the current to bound the currents in the duty cycle. Deviations from the constant‐current test, which increase the current, are acceptable. The locations and duration of the changes in current levels could have profound effects on the battery’s ability to maintain its minimum required voltage.
- There are two methods for battery capacity testing: rate‐adjusted and time‐adjusted. For tests greater than 1 h, the time‐adjustment method is recommended. The rate‐adjustment method is recommended for test durations less than 1 h. For tests of 1‐h duration, either method can be used. Once a test method is chosen, all subsequent tests should use the same method.