# Photovoltaic string combiner

Canonical URL: https://eloragrid.ai/symbols/photovoltaic-string-combiner
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: COMB
Drawing use: Schematic
Reference families: Manufacturer

A string combiner brings identified solar DC circuits together at a defined connection arrangement.

## In plain English

### What does Photovoltaic string combiner mean?

A string combiner brings identified solar DC circuits together at a defined connection arrangement.

### A simple example

Several string connections can feed a common outgoing DC route through their selected protection and monitoring.

### What the drawings help you do

Show each incoming string and the common outgoing DC connection, including any separately specified protection, isolation and monitoring. A combiner is a junction arrangement; its name alone does not establish which protective devices are installed or which string combinations are permitted.

### Before using this reference

- Label every incoming string and the common outgoing circuit.
- Identify installed protection and isolation separately.
- Reference the selected enclosure, terminals and monitoring documents.

### Does the combiner automatically protect every string?

No. The protective arrangement depends on the selected design and installed devices. Show the actual fuses, switching and monitoring instead of inferring them from a generic combiner block.

### Terms

- Combiner: A defined arrangement that brings several circuits to a common connection.
- String identification: The labels that let a reader trace each incoming solar circuit.

Concept diagram: Identified string circuits → Combining arrangement → Common DC connection
Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.

- [Solar string combiner functions](https://www.ti.com/solution/smart-combiner-box)


## What it represents

A string combiner brings identified solar DC circuits together at a defined connection arrangement.
Several string connections can feed a common outgoing DC route through their selected protection and monitoring.
Show each incoming string and the common outgoing DC connection, including any separately specified protection, isolation and monitoring. A combiner is a junction arrangement; its name alone does not establish which protective devices are installed or which string combinations are permitted. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- Label every incoming string and the common outgoing circuit.
- Identify installed protection and isolation separately.
- Reference the selected enclosure, terminals and monitoring documents.
- A combining connection does not replace the need to specify each circuit's protection and isolation.

## Information to show or reference

- Label every incoming string and the common outgoing circuit.
- Identify installed protection and isolation separately.
- Reference the selected enclosure, terminals and monitoring documents.

## Important distinction

A combining connection does not replace the need to specify each circuit's protection and isolation.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: Identified string circuits
- Concept output: Common DC connection

## Public references

- [Solar string combiner functions](https://www.ti.com/solution/smart-combiner-box) — Texas Instruments. Solar string combiner functions: public technical context for the named function. Product and compliance details remain with the publisher.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.