Replacing the Battery
Qualified person
WARNING
Risk of burns due to flashes
Short-circuit currents in the battery can cause heat build-up and flashes.
- Remove watches, rings and other metal objects prior to carrying out any work on the battery.
- Use insulated tools for all work on the battery.
- Do not place tools or metal parts on the battery.
WARNING
Danger to life due to incompatible lithium-ion battery
An incompatible lithium-ion battery can lead to a fire or an explosion. With incompatible lithium-ion batteries, it is not ensured that battery management is intrinsically safe and will protect the battery.
- Ensure that the lithium-ion batteries are approved for use with the Sunny Island (see technical information “List of Approved Batteries” at www.SMA-Solar.com).
- If no lithium-ion batteries approved for the inverter can be used, lead-acid batteries can be used.
- Verify that the battery complies with locally applicable standards and directives and is intrinsically safe.
WARNING
Chemical burns and poisoning due to battery electrolyte
If handled inappropriately, battery electrolyte can cause irritation to the eyes, respiratory system and skin, and it can be toxic. This may result in blindness or serious chemical burns.
- Protect the battery enclosure against destruction.
- Do not open or deform the battery.
- Do not throw batteries into fire. Batteries may explode in fire.
- Whenever working on the battery, wear suitable personal protective equipment such as rubber gloves, an apron, rubber boots and goggles.
- Rinse acid splashes thoroughly for a long time with clear water, and consult a doctor.
- Install, operate, maintain and dispose of the battery according to the manufacturer’s specifications.
NOTICE
Damage to the battery due to incorrect settings
The set battery parameters influence the charging behavior of the Sunny Island inverter. The battery can be damaged by incorrect settings of the battery type, nominal voltage and capacity parameters.
- Ensure that the values recommended by the manufacturer are set for the battery (refer to the technical data of the battery in the manufacturer documentation). Note that the battery charging behavior names used by SMA Solar Technology AG and the battery manufacturer may, in some cases, differ in meaning (for the battery charging behavior of the Sunny Island inverter, see technical information “List of Approved Batteries”).
- Set the battery capacity for a ten-hour electric discharge (C10). The battery manufacturer specifies the battery capacity in relation to discharge time.
Check and log the status of the battery before performing maintenance work.
Transition resistances can impair the performance of the batteries.
- Ensure that the torques at the cable glands of the battery connections are correct each time that maintenance is performed.
Procedure:
- Stop the system and switch off the Sunny Island ( > Starting and Stopping the System).
- Ensure that the battery is not grounded unintentionally.
- Open the load-break switch of the battery fuse and secure against reconnection.
- Remove the battery to be replaced (see battery manufacturer's manuals).
- Mount and connect the new battery (see manuals of the battery manufacturer). The battery must comply with the technical requirements of the Sunny Island inverter (refer to the Sunny Island inverter installation manual for technical data of the DC connection).
- Quickly close the load-break switch of the battery fuse and close the battery fuse (see battery fuse documentation).
- Switch the Sunny Island on ( > Switching on the Sunny Island).
- Activate the user interface of the inverter ( > Establishing a connection to the user interface).
- Log in as Installer ( > Logging In and Out of the User Interface).
- Start the installation assistant.
- Select [Save and next] for each step up to the step Battery configuration.
- Select the button [New battery configuration].
- Set the parameter Type to the battery type used.
- Only make the following settings for lead-acid batteries.
Set the parameter Voltage to the battery voltage.
Set the parameter Nominal capacity to the C10 nominal capacity of the battery ( > Determining the Battery Capacity).
- Select [Save and next] until the installation assistant closes.
If the battery is unintentionally grounded, identify the connection between the battery and ground potential and remove the unintentional connection. This helps to prevent electric shock caused by malfunction of other system devices.