Overview:

1) Installers should reference the technical installation documents from the manufacturer website for specifications.

Step by Step Guide to Reach Technical Installation Documents (click to expand)

- Use this link https://us.qcells.com/q-tron-blk-m-g2-ac/

Click on 'Technical Resource Guide' which will take you to the resources linked below.
Please review all relevant documents / Technical resources which are not crossed out.

2) Installers are responsible for obtaining certifications required to be a certified installer with QCells.

Design Requirements:

String Sizing Requirements

Maximum 11 AC modules per branch circuit (maximum 20A breaker)
- 1.45A max continuous output for each AC module
Voltage Rise (Refer to system design guide, VRise calculations - here)
- Under 2%
- Consider using 10 AWG for longer runs or if approaching 11 AC modules per branch circuit.
Maximum count per system
- 144 AC modules
  - 44 for 1 x Q.Home combiner & +100 using off the shelf combiner box (see image below)
    If greater than 44 - need external production CT - (P2 on GEM board).
    See technical resources for specifications.

Click for String Sizing Requirement visuals

Maximum system With Battery (PW3 ONLY)
- Only PW3 acceptable
  - 7.68 AC kW per PW3
  - 10 kW with expansion (See QCells application note - here)

Equipment location
- No direct sunlight
- No southern facing

Installation Requirements

Rail Placement with respect to micro inverters (click to expand)

Ensure rail position is not obstructing the microinverter.
Avoid pinched cables

AC cables (click to expand)

Only use proprietary QCells AC cables.
- Can run QCells AC cables up until the junction box
  - ONLY from the junction box to the combiner, can use non QCells AC cables.
- Can run QCells AC cables direct if not using the Junction box.
- For long home runs
  - Use the voltage rise table and ensure we do not run direct (Have to use a Jbox).

Combiner requirements

Maximum 80A DG breaker
- 4 x 20A breakers

Combiner requirements (click to expand)

Maximum 80A DG breaker
- 4 x 20A breakers
- 95A with gateway (80A DG breakers + 15A Gateway breaker)
Acceptable breaker types
- Eaton (BR) ONLY
  - Maximum 60A (BR260) single breaker
- No Quad or Triplex
Wiring & Phasing
- PV2 breaker must be wired with L2 to the top breaker terminal due to its position on the bus (see image below)

Equipment location
- No direct sunlight
- No southern facing
Internet & Communication Requirements
- Cell Modem / Cell Kit (Required for all LR projects)
  - Purchased separately
- Install Wifi dongle as default
  - Needed for commissioning
- Commissioning screenshots or monitoring portal verification
  - Connection priority
    If either (or both) Ethernet or Wi-Fi & Cellular is connected.
    Device will connect to the cloud via Ethernet -> Wi-Fi -> Cellular as priority. (see image below)

Conduit Installation (click to expand)

Bottom Entry ONLY (Recommended)
- Designated spots for conduit holes shown as 1,2, & 3 (see image below)
Designated 'Do Not Drill' zones on the top, side and bottom (see image below).

CT Installation Requirements (click to expand)

Specifications
- 200A QCell CT devices ONLY
- Wire Run
  - Do NOT run through the same conduit as other conductors.
- Consumption CT
  - 5.2 m (CT-JS-CLAMP-200A-5.2m) or 25 m (CT-JS-CLAMP-200A-25m)
    Can extend to 100 m / 300 feet - NOT RECOMMENDED
  - Splicing - Can splice CTs together
    If matching models ONLY
    Up-to 2 pairs ONLY
    Recommended - 2 wire twisted (300V, 18-20 AWG)
- Production CT
  - Pre installed in the combiner panel
  - External Production CT
    2 m
  - Any production CT is NOT ALLOWED TO SPLICE / EXTEND

Consumption CT Location Requirements (click to expand)

Load + Solar
- CTs shall be configured to measure all home loads + solar as default.
- Verify settings located in commissioning settings
Load Only
- Can be configured to only measure home loads only.
  - In the event of any MSP constraints that do not allow for Load + Solar configuration.
- Verify settings located in commissioning settings

CT polarity & Labelling
- Consumption CTs - Pointing towards loads (away from source)
- CTs can have polarity reversed remotely via monitoring portal or commissioning app
CT wires termination point
- CT shall be terminated on the dedicated C1 & C2 terminals.

External Production CT
- If installing more than 44 modules on additional strings in an off the shelf sub panel.
  - CT polarity & Labelling
    Arrowing point away from source (PV)
  - CT wires termination point
    CT shall be terminated on the dedicated P2 terminals

QCells AC PV + Tesla PW3 Battery (click to expand)

Ensure both manufacturer guidelines are followed - references linked below
- QCells application note
- Tesla PW3 installation requirements

Commissioning Requirements (click to expand)

Commissioning photos (if no monitoring access is provided)
Review the resources here
Cell Modem / Cell Kit installation manual & Communication Redundancy
- WiFi dongle & Cell Modem / Cell Kit needed for commissioning
  - Cell Kit purchased separately
PCS
- Backfeed Power Limitation (Current Limit out of the combiner)
  - PV ONLY
    PV backfeed breaker does not need to follow NEC 705.12
    Example: For a 200/200A panel, backfeed breaker does not have a limit at 40A (follow AHJ discretion), as long as backfeed power limit is set at 40A.
- Busbar Overload Control - Pending release (No ETA)

Monitoring Access

Admin Sign up

How EPCs will sign up
- Their Admin of their company will sign up.
  - See instructions below for admin.

Example
- Company Name: SUNNYEPC
- Company address: 123 Bright Way, Sunny City, USA
- Company Type: Installation, operation/management
- Partner Admin Email Address: [email protected]
- Partner Admin First and Last name: Sunny Sunnerson

Adding Users

Once done, they assign “users” for all employees........

QCells AC Module - Design, Install & Commissioning quick guide