Keep three solar string paths organized from array to inverter

A clear wiring layout makes a multi-string solar installation easier to follow. This TOMZN solar PV combiner box brings three separate input and output paths into one covered enclosure, with the fuse holders, DC breakers and surge-protection modules arranged side by side for a tidy DC-side installation.

Key Benefits

• Three input/output paths — Route three positive/negative string pairs through separate channels with each channel clearly separated.
• Integrated protection components — Keep the fuse holders, surge modules and DC breakers together in an 18-module enclosure.
• Hinged translucent door — See the component arrangement through the cover and open the front for qualified servicing.
• Marked cable connections — Positive, negative and grounding positions help the installer identify the intended circuit paths.
• 600V DC system specification — Provides a defined maximum system-voltage specification for compatibility checks during solar-system design.

For a compatible array with separate inverter or MPPT inputs, this box creates one organized point for the string-side hardware. Choose the listed breaker configuration to suit the complete circuit design, with coordinated fuse and breaker sizing for each string path.

Frequently Asked Questions

How does the three-channel layout support my installation?

Three positive/negative input pairs connect to three corresponding output pairs, keeping each PV string path organized for a compatible inverter or MPPT arrangement.

What does the 18-way format provide?

The 18-module enclosure brings three groups of fuse holders, surge-protection modules and DC breakers together behind one hinged cover.

Which breaker and fuse configurations are available?

Choose from 16A, 20A, 25A, 32A, 40A, 50A and 63A breaker configurations. The supplied matching table pairs these with 15A, 20A, 25A and 30A fuses respectively, with 30A fuses specified for the 32–63A breaker choices. A qualified installer can match both ratings to the planned circuit.

What features support outdoor installation?

The listed IP65 enclosure, covered front panel and dedicated cable entries support an appropriately mounted outdoor PV installation. Maintain the specified protection through sealed entries, correct grounding and installation to the manufacturer requirements; keep the enclosure above standing water.

How should the box be installed?

Have a qualified solar installer connect the box as part of a coordinated PV protection design, verifying string voltage, current, fuse coordination, polarity, grounding and inverter compatibility. Select surge and lightning protection appropriate to the site.

SPECIFICATIONS

Brand Name: TOMZN

Certification: CE

Does it include a Battery?: No

Does it include wireless functionality?: No

EU LVD Voltage: High voltage: Above 50Vac or 75Vdc

High-concerned chemical: none

Is Smart Device: no

Model Number: 18-3-3-600V

Origin: Mainland China

Type: Mini,Circuit breaker

is_customized: Yes

Model: TOPV18-3-3
Number of input ways: 18
Number of input channels: 3
Number of output channels: 3
Maximum system voltage: DC 600V
Enclosure rating: IP65
Fuse holder rating: 1100V DC (with fuse)
Circuit breaker type: 2P DC 600V
SPD type: 2P DC 600V
Protection features: Overcurrent protection, surge protection, disconnection function
Application: Outdoor photovoltaic combiner box.