YOTTA ENERGY SL-1000 SolarLEAF Inverter Supply User Manual

YOTTA ENERGY SL-1000 SolarLEAF Inverter Supply

Introduction

The SolarLEAF™ is a PV-coupled micro energy storage unit with in-built thermal regulation technology to minimize the balance of system costs and the added complexity of installing storage alongside solar projects. Each SolarLEAF™ has two pairs of DC ports (IN and OUT). The unit receives energy from one or more solar PV modules on the input port and connects to an inverter on the output port to deliver power to the load.

SolarLEAF System

SOLARLEAF SYSTEM COMPONENTS

• YOTTA SolarLEAF solar module-level storage [See Appendix A for additional detail].

MECHANICAL INSTALLATION

WARNING: Ensure the DC jumper wires from the SolarLEAF to the solar panel and microinverter are plugged into the correct terminals on the SolarLEAF or damage will occur and void the warranty. Take note of the DC input and DC output (Marked OUT- and OUT+) terminal locations on the SolarLEAF shown below.

Note: SolarLEAF weighs 25.7kg, or 56.7 lbs. SolarLEAF should always be lifted by 2 people by grasping the flange on the perimeter of the top of the unit.

Avoid mounting the SolarLEAF in a location that will interfere with the PV modules. Separate SolarLEAFs by a minimum of 50cm. Mount SolarLEAFs a minimum of 6cm from the roof. To comply with NFPA 855, no more than 600 SolarLEAF battery storage systems can be installed on a single roof.
Warning: Outdoor commercial use only. Not intended for marine environments or seismic locations. The system shall be installed in accordance with local electrical, building, fire and other codes or utility requirements as applicable to the installation and equipment, by qualified service personnel in accordance with the installation instructions and appropriate practices.

WARNING: AC power to the microinverters SHOULD NOT be turned on at this point of installation.

1. Orient the cables of the SolarLEAF as shown. Lower the SolarLEAF into the ballast rails on the racking.
2. Insert a 370-00018 bolt, through the foot of the SolarLEAF and a slot in the ballast rail.
3. Attach a 370-00016 WASHER, FLAT, and 370- 00021, NUT, EXT TOOTH LW, and torque to 10.9Nm. (8 lbf-ft)

ELECTRICAL INSTALLATION

The SolarLEAF system is an extension of existing solar systems with micro- inverters, where the ESS resides between the PV module and the micro-inverter. This schematic shows 4 PV panels connected to 4 SolarLEAFS connected to one 4 input micro-inverter. All connections to the Solar LEAF are low voltage DC (<60Vdc).

DC

• Input: Connect the (+/-) DC wires from the PV (MC4 compatible) to the Input ports (Marked PV – and PV+) of the SolarLEAF (MC4 compatible) .
• Output: Connect the (+/-) DC wires from the SolarLEAF (Marked OUT- and OUT+) to the positive and negative terminals of the coresponding channel of the microinverter input port.

Transportation & Storage

TRANSPORTATION
The SolarLEAF will be shipped at a SOC level of 30% to ensure transportation and storage safety. The units will be in a state of deep sleep.

• Battery & cells are monitored by the BMS
• The battery port is disconnected from the rest of the power electronics
• All (wireless and wired) communication is turned off within the SolarLEAF

STORAGE

• Unmated plug connectors must be protected from moisture and dirt with a sealing cap (MC4 Article PV-BVK4 for sockets and PV-SVK4 for plugs). The male and female parts must not be plugged together when soiled.

Operation & Maintenance

ACTIVATING THE SYSTEM
The individual units come plug-and-play ready. After connecting the inverter to a valid grid connection, the output of the currently-sleeping SolarLEAF should be connected to an available pair of ports on the inverter. The SolarLEAF will automatically WAKE when it detects a voltage greater than 12V DC on its PV port—so connecting the associated PV panel with the PV port will turn the unit on.

MODES

1. Charging: The key to the long-term health and reliability of a module-level battery system is the ability to maintain routine charge and discharge across all the units within the system. The SolarLEAF has a built-in MPPT charger that converts solar energy and charges the battery. The MPPT helps maximize solar power, especially in cases of module shading or soiling.
2. Time-of-Use Shifting: The SolarLEAF has the ability to store power until a user-defined time using a time-of-discharge profile. The profile instructs SolarLEAF when to produce output port power and the minimum amount of power to produce as long as it is available. After the profile is created, it is then sent to and stored in SolarLEAF.
3. PV Smoothing: If the battery is full and the SolarLEAF is in the PV pass-through mode, the power generated from the PV port is pushed to the Out port. The Out port is set to track the power of the PV port, but at a slower rate than the rate at which the PV power level changes. This creates a smoothing effect or a low-pass filtering effect. The Out port can also be set to a constant output, and as long as there is power available from the battery, the Out port will maintain this constant output power.
4. Grid-Outage / Rapid Shutdown: During a grid outage, the micro-inverters that route the SolarLEAF’s energy into AC are compliant with RSD requirements as defined in the micro-inverters datasheet.

DEACTIVATING THE SYSTEM

• For more than a week of storage, ensure that the SolarLEAF units are at 30% SOC.
• For more than a week of storage, ensure that the SolarLEAF units are at 30% SOC.
• To deactivate the system, the unit’s PV port cables should be disconnected from the PV panel and the Output port cables should be disconnected from the inverter.

Disposal

• Contact your local authorities for proper disposal and recycling regulations. DANGER: DO NOT CRUSH, DISSASSEMBLE, OR DISPOSE OF IN FIRE.

Glossary

• MPPT: Maximum power point tracking
• SOC: State of Charge of the (SolarLEAF) battery
• RSD: Rapid Shutdown

Technical Support

• +1 512-856-7788 2101 East Saint Elmo Road, Building 1, Suite150, Austin, TX 78744

CAUTION

• “No user-serviceable parts” Contact Yotta Energy for service and repair.

NOTE: This equipment meets the cell-level performance criteria of UL 9540A.

Appendix A

SOLARLEAF ORIENTATION

• The SolarLEAF is to be installed and tested with the TOP facing upwards and the fins facing toward the back.
• The back wall of the unit houses all of the interfaces, listed from left to right as follows:

PRODUCT SPECS FOR SOLARLEAF SL-1000

cells)
Temperature Range| -20°C to 43°C
Dimensions (LxWxD)| 400mm x 667mm x 108mm / 15.75” x 26.25” x 4.25”

Enclosure Rating

| Do not immerse in water, Outdoor only, IP 67 Do not keep under RH> 90 % (non-condensing) Do not expose to direct sunlight

ELECTRICAL INTERFACE / POWER PORTS

• Always use matching connectors and a proper disconnection tool to ensure easy connection/disconnection.

2101 EAST ST ELMO ROAD, STE 150 AUSTIN, TEXAS 78744. YOTTAENERGY.COM.

References

• Yotta Energy

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