SolarEdge Power Optimizer Inter-Compatibility Application Note

Version 1.5, September 2023

Version History

Version 1.5, September 2023 – Section added on Smart Modules.
Version 1.4, September 2023 – Legal notice added.
Version 1.3, July 2023 – Error in Table 1 corrected and footnote 2 modified.

Introduction

This application note specifies the inter-compatibility between SolarEdge Power Optimizers of the S-series and P-series. Furthermore, it specifies the compatibility of P-series Power Optimizers with earlier PBxxx and OPxxx series Power Optimizers.

For the compatibility of commercial Power Optimizers, consult this technical note.

Notes

Inter-compatibility refers to the ability to install different Power Optimizers in the same PV string.
All Power Optimizers installed within the same PV string must be inter-compatible, as specified in compatibility tables 1 and 2.
A single PV string refers to Power Optimizers connected to each other using their output cables to form a string.

Guidelines for Replacing Power Optimizers

When replacing a Power Optimizer, it must be compatible with the other Power Optimizers in the string. Use the following general guidelines:

You can include different series and models of Power Optimizers in the same installation if you install them in separate PV strings. However, Power Optimizers that are inter-compatible can be installed in the same PV string.
When replacing a Power Optimizer, use SolarEdge Designer to verify that the PV panel specifications, such as power, Isc, and Voc (at minimum ambient temperature), are compatible with the replacement Power Optimizer. Consult the Power Optimizer datasheet for details.

Compatibility with Smart Modules

SolarEdge Smart Modules all have compatible, built-in Power Optimizers (P370 or S440). These Power Optimizers are compatible, thus ensuring that all SolarEdge Smart Modules are inter-compatible.

P-Series and S-Series Compatibility

In existing installations, installing P-series and S-series Power Optimizers in the same PV array is only possible based on their inter-compatibility, as specified in Table 1. When replacing P-series Power Optimizers with S-series Power Optimizers, ensure the inverter's firmware version has been updated as follows:

For inverters with LCDs, the minimum required CPU firmware version is 3.2537.
For inverters compatible with SetApp, the minimum required CPU firmware version is 4.8.xx.

The following tables describe the Power Optimizer series and models that can be installed in the same PV string, during installation, or when a Power Optimizer is replaced. If a cell contains a checkmark (✔), the relevant Power Optimizers can be installed in the same string.

Table 1: Residential S-Series and P-Series Power Optimizer Compatibility

Optimizer Model	Compatible With (S-Series Models)
Optimizer Model	S440	S500	S500B	S650B
S-Series
S440	✔	✔
S500	✔	✔	✔
S500B		✔	✔	✔
P-Series
P3xx	✔	✔
P400¹	✔	✔
P500¹	✔	✔
P401	✔	✔
P350^1,2/P370^1,2/P401^1,2	✔	✔
P404/P485/P505	✔	✔
P601		✔	✔

Table 2: Power Optimizer Inter-Compatibility (P-Series, OP-Series, PB-Series, M-Series)

Series	Optimizers	Compatible With (Models)
Series	Optimizers	M2640	P320/P340/P350/ P370/P375/P395	P370T	P400	P401	P404	P405	P485	P500	P505	P601	P350^1,3/P370^1,3/P401^1,3	OP250-LV	OP300-LV
P-series	P300		✔		✔	✔
	P320		✔		✔	✔
	P340		✔		✔	✔
	P350		✔		✔	✔
	P370		✔		✔	✔
	P370T			✔
	P375		✔		✔	✔
	P395		✔		✔	✔
	P400				✔
	P401					✔
	P350^1,3/P370^1,3/P401^1,3											✔	✔
	P404⁴						✔	✔	✔
	P405⁴						✔	✔	✔
	P485⁴						✔	✔	✔
	P500								✔	✔
	P505								✔	✔	✔
	P601								✔	✔	✔
OP-series	OP250-LV		✔		✔	✔								✔	✔
	OP300-LV		✔		✔	✔								✔	✔
	OP300-MV		✔		✔	✔								✔	✔
	OP350-LV		✔		✔	✔								✔	✔
	OP350-MV		✔		✔	✔								✔	✔
	OP400-MV		✔		✔	✔								✔	✔
	OP400-EV		✔		✔	✔								✔	✔
OP480		✔		✔	✔								✔	✔
OP500-IV		✔		✔	✔								✔	✔
PB-series	PB250-AOB		✔		✔	✔
	PB350-AOB		✔		✔	✔
	PB350-TFI		✔		✔	✔
	PB250-CSI		✔		✔	✔
M-series	M2640	✔

IMPORTANT NOTE: Using a configuration that conflicts with the above compatibility tables may lead to warranty exclusion.

¹ Important - Check the PV panel's Voc. If Voc is less than 60V, use S440 or S500. If Voc is greater than 60V, contact SolarEdge Support.

² Operation with SMI or SolarEdge Key is not supported by S-series Power Optimizers.

³ Only compatible when connected to a SolarEdge inverter.

⁴ For P405 and P485, the same replacement options apply for both single and dual input versions.

	SolarEdge Residential Power Optimizer Inter-Compatibility Technical Note This technical note from SolarEdge details the inter-compatibility guidelines for residential Power Optimizers, covering S-Series, P-Series, and R-Series models for both new installations and RMA (Return Material Authorization) purposes. It provides compatibility tables and essential notes for installers and technicians.
	SolarEdge Power Optimizer Inter-Compatibility Technical Note This technical note details the inter-compatibility between SolarEdge Power Optimizers of the S-series and P-series, including compatibility with previous series and service part numbers. It provides guidelines and tables for proper installation and replacement.
	SolarEdge S-Series Power Optimizer Specifications and Connections Technical application note detailing the specifications, features, and connection guidelines for SolarEdge S-Series Power Optimizers, including comparisons with P-Series models like S440, P401, S1200, and P1100.
	SolarEdge Power Optimizer S440, S500, S500B Datasheet Datasheet for SolarEdge Power Optimizers S440, S500, and S500B, designed for residential PV installations. Highlights features like module-level optimization, safety shutdown, superior efficiency, and compatibility with SolarEdge inverters.
	SolarEdge Product Waiver Approval for S500B and S650B Power Optimizers Official waiver approval from SolarEdge for specific configurations of S500B and S650B Power Optimizers in European installations, detailing approved parameters and warranty conditions.
	SolarEdge Installation Guide: Comprehensive Setup and Operation Detailed installation guide for SolarEdge power harvesting systems, covering inverters, power optimizers, safety instructions, and system commissioning for optimal solar energy production.
	SolarEdge S650A Power Optimizer for Residential Installations - Technical Specifications Detailed technical specifications and features of the SolarEdge S650A Power Optimizer, designed for residential rooftop solar installations, offering superior efficiency and advanced safety.
	SolarEdge Product Waiver Approval for S440 Power Optimizers Official waiver approval from SolarEdge for the use of S440 Power Optimizers with specific PV modules, detailing conditions and warranty implications.