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Installation Manual
Installation Manual for PV Link and SnapRS
Models: S2502, RS802, and RS802-clip
WARNING
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.
(W000209)
Register your Generac product at:
https://pwrfleet.generac.com
1-888-GENERAC
(888-436-3722)
SAVE THIS MANUAL FOR FUTURE REFERENCE
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Summary of Contents for Generac Power Systems S2502
- Page 1 Installation Manual Installation Manual for PV Link and SnapRS Models: S2502, RS802, and RS802-clip WARNING Loss of life. This product is not intended to be used in a critical life support application. Failure to adhere to this warning could result in death or serious injury.
- Page 2 Use this page to record important informa- Operation and Maintenance tion about your Generac Product Proper maintenance and care of the energy storage sys- tem ensures a minimum number of problems and keeps Record PV Link™ and SnapRS™ information for your operating expenses at a minimum.
- Page 3 019592 Installation Manual for PV Link and SnapRS Installation Manual...
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- Page 5 Table of Contents Mounting to Rail-less Racking.........20 Section 1: Introduction and Safety Connecting PV modules........20 Introduction ............7 2014 NEC and Earlier Editions........20 Read This Manual Thoroughly ........7 2017, 2020, and 2023 NEC Compliant Safety Rules ............7 Systems..............20 SnapRS Installation Guidlines.........22 How to obtain service ...........
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- Page 7 Introduction and Safety Section 1: Introduction and Safety Introduction NOTE blocks are used to alert personnel to special in- structions about a particular operation that may be haz- Thank you for purchasing a Generac PWRcell ® product. ardous if performed incorrectly or carelessly. Observe them carefully.
- Page 8 Introduction and Safety WARNING CAUTION Risk of injury. Do not operate or service this machine if Equipment Damage. Connect only to REbus-compatible not fully alert. Fatigue can impair the ability to service devices to the DC bus. Never connect to any other DC this equipment and could result in death or serious power source.
- Page 9 Introduction and Safety Electrical Hazards WARNING DANGER Electrocution. Potentially lethal voltages are generated by this equipment. Render the Electrocution. Water contact with a power equipment safe before attempting repairs or source, if not avoided, will result in death or maintenance. Failure to do so could result in serious injury.
- Page 10 Introduction and Safety This page intentionally left blank. Installation Manual for PV Link and SnapRS Installation Manual...
- Page 11 General Information Section 2: General Information PV Link Specifications Description Units S2502 Rated power 2,500 (continuous) Peak efficiency MPPT input voltage 60 — 360 Rated power input voltage 200 — 360 Maximum input voltage 420 (absolute maximum) Maximum input current (operating) 13 A @ 122 °F (50 °C) 10 A @ 158 °F (70 °C)
- Page 12 General Information Important Product Information SnapRS Dimensions Figure 2-3. PV Link Serial Number Location Figure 2-1. Serial number tag (A) includes a remov- able layer that can be peeled off leaving the underlying la- bel in place. Adhere the removable layer to the inside cover of this manual and record the information from this tag in Table 1 PVlink and SnapRS Important...
- Page 13 General Information GFDI Information Component Locations The PV Link’s internal ground fault detector and interrupt- PV Link Component Locations er (GFDI) is designed to trip at 240 mA (± 40 mA) of PV DC voltage ground current. Ground faults are displayed Figure 2-4.
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- Page 15 Installation Design Section 3: Installation Design Voltage Considerations 2. Use Equation (2) to determine the Max Number of Modules Voc, where PV Link Max Voc = 420 VDC. Use the formulas in this section to determine the maxi- mum number of PV modules of a given type that can be connected to a PV Link.
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- Page 17 PVRSS Compliance Section 4: PVRSS Compliance 2011 NEC and Older Editions 2017 NEC (and forward) 2011 NEC and older editions do not require PVRSS The 2017, 2020, and 2023 NEC have PVRSS require- compliance. ments mandating the need to reduce voltages of con- trolled conductors to less than 80 VDC within the array, NOTE: The PV Link will still provide 2014 NEC compliant and less than 30 VDC outside the array, as well as some...
- Page 18 PVRSS Compliance This page intentionally left blank. Installation Manual for PV Link and SnapRS Installation Manual...
- Page 19 REbus communication • Ensure at least a 1 in (25.4 mm) clearance between the heatsink fins and adjacent surfaces to allow suf- PV Link / S2502 ficient air flow for cooling. Made in the USA SnapRS™ compatible substring optimizer Conforms to UL1741, UL1699B Certified to CSA C22.2 #107.1...
- Page 20 2023 NEC compliant systems, connect the substring PV modules in series using one SnapRS device in be- NOTE: For PV Link model S2502, attachment tween each module. flange slots (B) may be widened using tooling, such as a drill and bit, where the rail-less racking mount bolt needs to fit for mounting.
- Page 21 Mounting and Connecting Figure 5-4. 011990 Figure 5-4. Single PV Substring with SnapRS Devices PV Substring Input - PWRcell Inverter PV Substring Input + REbus Homerun REbus Output - SnapRS Device REbus Output + PV Module Figure 5-5 NOTE: See .
- Page 22 Mounting and Connecting Proceed as follows to install PV modules in series to PV • Figure 5-4. PV modules are installed in series Link: with SnapRS devices connected inline between each module. 1. Connect the negative lead of the first module in the string to the PV Link at the location marked PV •...
- Page 23 Mounting and Connecting 3. Connect the PV substring positive lead to PV Link at the location marked PV Substring Input + (F). Component Locations for more information. 4. Connect the PV substring negative lead with its connected SnapRS device to PV Link at the loca- tion marked PV Substring Input - (E).
- Page 24 Mounting and Connecting Connecting to Inverter CAUTION Equipment damage. Connect the PV Link output to a RE- bus-compatible device (± 190 VDC nominal regulated DC bus) only. Connecting to conventional PV inverters or any other device could cause equipment damage. (C000659) Figure 5-8.
- Page 25 Operating Instructions Section 6: Operating Instructions User Interface via Inverter • Verify REbus +/- are connected with correct polarity to each PV Link. PV Link Information and control features are available on • Verify each PV Link has a low resistance ground the PWRcell Inverter control panel when REbus is ener- connection to the inverter ground bar.
- Page 26 Operating Instructions Figure 6-2. Figure 6-5. PV Link S2502 Menu PLM Channel: Enable Vin Startup: 135.0V Mod. Settings String Count: Test PVRSS Enable PVRSS: RCPn: 00010003XXXX Cancel Save < EXIT SCROLL > NEXT • SELECT 016075 020070 Figure 6-5. PVRSS Commissioning (4 of 8) Figure 6-2.
- Page 27 Operating Instructions Figure 6-8. 11. Complete steps 1 - 10 for each PV Link in the system. PV Link S2502 Menu • Verify the “SnapRSInstalld” number is equal Enable to the number of SnapRS physically installed Mod. Settings on the associated PV Link.
- Page 28 Operating Instructions Disabling PV Link NOTE: The device page display should read Dis- abled. If it does read not Disabled, press the center NOTE: Disabling a PV Link does NOT power down the button and Disable the PV Link. PV array if SnapRS devices are not installed. If SnapRS 2.
- Page 29 Maintenance Section 7: Maintenance CAUTION Equipment damage. Never open the PV Link. The opti- mizer is factory-sealed and contains no field serviceable parts. Opening the optimizer could result in equipment damage. (C000655) Maintenance Figure 7-1. For maximum performance, keep heat- sink fins (A) free of leaves and other debris.
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- Page 31 Troubleshooting Section 8: Troubleshooting CAUTION Equipment damage. Connect the PV Link output to a RE- bus-compatible device (± 190 VDC nominal regulated DC bus) only. Connecting to conventional PV inverters or any other device could cause equipment damage. (C000659) Problem Cause Solution Low Sun w/...
- Page 32 Troubleshooting SnapRS Health Check There are no functional tests which can be performed on SnapRS devices in the field. However, some simple digi- tal multimeter (DMM) checks can confirm the general health of a SnapRS device. DMM Red to SnapRS –, DMM Black to SnapRS + Resistance reads ~ 12 MΩ...
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- Page 35 Troubleshooting This page intentionally left blank. Installation Manual for PV Link and SnapRS Installation Manual...
- Page 36 Part No. DMAN00013 Rev. E 02/11/2025 Generac Power Systems, Inc. © 2025 Generac Power Systems, Inc. S45 W29290 Hwy. 59 All rights reserved Waukesha, WI 53189 Specifications are subject to change without notice. 1–888–GENERAC (1–888–436–3722) No reproduction allowed in any form without prior written www.generac.com...
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