This is a 2-pole DIN-rail-mount DC fuse holder for solar PV string protection, rated 1000 V DC, designed to accept standard 10x38 mm gPV photovoltaic fuses from 6 A through 32 A. Two product configurations: the holder alone (paired with separately-sold PV fuses), or the complete set (holder + matched fuse). 35 mm DIN rail mount, 17.5 mm modular width per pole, IEC compliant, high-temperature plastic body.
Product Description
This is a 2-pole DC fuse holder engineered for solar photovoltaic string protection. PV string fuses are mandatory in any solar array of three or more parallel strings: when one string develops a fault, the parallel-connected healthy strings can deliver back-fed current into the fault, exceeding the cable's rated current and creating a fire hazard. The string fuse interrupts this fault current before damage occurs.
This holder accepts the industry-standard 10x38 mm cylindrical gPV photovoltaic fuse cartridge. The 1000 V DC rating means it suits virtually all residential and small-commercial solar arrays where the string open-circuit voltage stays below 1000 V (most installations). The 2-pole format breaks both positive and negative conductors of one string simultaneously, which is required by IEC standards for ungrounded PV systems.
Two purchase options are available: the holder shipped without a fuse cartridge (when you already have your fuses, or are sizing them at install time), or the complete set with both holder AND a matched fuse pre-selected by amperage. Available fuse current ratings are 6 A, 10 A, 15 A, 20 A, 25 A, 30 A, and 32 A.
Key Benefits
- 1000 V DC rating fits most residential and small commercial solar PV arrays
- 2-pole format breaks positive AND negative simultaneously — required for ungrounded PV
- Accepts standard 10x38 mm gPV fuse cartridges (industry standard, widely available)
- Sold as holder alone OR as matched holder+fuse set for fast deployment
- Standard 35 mm DIN rail mounting fits any solar combiner box or control panel
- 17.5 mm modular width per pole — same footprint as standard MCBs in the same panel
Key Features
The defining feature is the combination of 1000 V DC rating, 2-pole format, and 10x38 mm gPV fuse compatibility. PV string fuse holders need significantly higher arc-quenching capability than AC fuse holders because DC arcs do not self-extinguish at zero crossings. The 1000 V DC-20B rating means this holder is qualified for the high-energy DC interruption found in PV applications. The high-temperature plastic body resists thermal runaway in the event of fuse degradation, which is the dominant failure mode in older PV installations.
Technical Specifications
The defining parameters are the 1000 V DC rating, the 2-pole format, the 10x38 mm gPV fuse compatibility, and the 35 mm DIN rail mounting. Full specs below.
| Parameter | Value |
|---|---|
| Pole configuration | 2P (breaks positive + negative simultaneously) |
| Rated voltage | 1000 V DC |
| DC utilization category | DC-20B |
| Fuse cartridge size | 10 x 38 mm cylindrical |
| Fuse type | gPV (photovoltaic) |
| Fuse current ratings (set option) | 6 A, 10 A, 15 A, 20 A, 25 A, 30 A, 32 A |
| Mounting | 35 mm DIN rail (TH35) |
| Modular width | 17.5 mm per pole (35 mm total for 2-pole) |
| Body material | High-temperature flame-retardant plastic |
| Safety standard | IEC compliant |
| Certification | CE |
| Form factor | EAPV-32 / EAPV-32L |
| Internal SKU | 54G-PV-FUSE-001 |
Technical data sourced from manufacturer documentation.
What's Included
- Holder-only variants: 1 x 2-pole DC fuse holder (no fuse — buy the fuse separately)
- Set variants (EAPV-32-2P or EAPV-32L-2P): 1 x 2-pole holder + 2 x matched 10x38 mm gPV fuses at the selected amperage
Compatibility & Applications
This holder fits any 35 mm DIN rail in a solar combiner box, PV junction box, or distribution panel. Typical applications include:
- Residential rooftop solar PV string protection
- Small commercial solar array combiner boxes
- Off-grid solar systems with multiple parallel strings
- Solar PV system retrofits adding string-level protection where it was missing
- DIY solar installations following IEC and local electrical code
Not suitable for: AC circuit protection (this is DC-only, the AC arc-extinguishing characteristic is different), system voltages above 1000 V DC (use 1500 V DC-rated holders for utility-scale arrays), single-pole protection where IEC requires 2-pole break, or fuse cartridge sizes other than 10x38 mm.
Why Trust Us
Operated for 5+ years across 35+ countries by a UK-incorporated company specializing in renewable energy and small-electronics components. Every order ships with tracked delivery, a 30-day return window, and a manufacturer-backed warranty against defects. Technical questions are answered by email at info@54energy.net. Last updated: May 2026.
Important safety note: solar PV system protection components must be installed by a qualified electrician in accordance with IEC 60269 and local electrical codes. Incorrectly sized or omitted PV string fuses are a recognized fire risk in solar installations.
Frequently Asked Questions
Why do I need 2-pole instead of 1-pole?
In an ungrounded PV system (functionally insulated, IT system), neither the positive nor the negative conductor is referenced to ground. A fault on either conductor can be hazardous, and IEC standards therefore require that protective devices break BOTH conductors simultaneously. Single-pole breakers leave the un-broken conductor energized during a fault. 2-pole is the correct choice for any modern PV string installation.
How do I size the fuse for my string?
The fuse rating must be greater than 1.25× the string's short-circuit current (Isc) and less than the cable's rated ampacity. For a typical residential PV string with 10–11 A Isc, a 15 A or 16 A gPV fuse is the standard choice. Always check both your panel datasheet and the inverter manufacturer's recommendations — oversized fuses do not protect; undersized fuses cause nuisance trips on hot summer afternoons.
What is the difference between EAPV-32 and EAPV-32L?
Both are 2-pole 1000 V DC holders for 10x38 mm gPV fuses up to 32 A. The model number suffix differentiates internal lever / cover variants used during manufacturer revisions. Functionally and dimensionally they are interchangeable for installation purposes.
How fast does shipping take?
Orders are dispatched from regional fulfillment partners in North America, Europe, and Asia. Typical delivery is 5 to 15 business days depending on destination country, with tracked shipping included. Specific timelines per destination are listed in the Shipping Policy.
How does this PV fuse holder compare to others in its category?
Within the solar PV string protection category, the meaningful comparison points are DC voltage rating, pole count, and the holder+fuse pre-matched option. This product offers 1000 V DC, 2-pole format, and the option to buy holder-only or as a complete pre-matched set — the configuration that fits the broadest set of residential and small-commercial PV deployments and drives the lowest return rate within our solar-protection category.
Can I request a quote or estimate?
No need to request quotes or estimates. You can purchase all products online directly on our website. Accepted payment methods are credit card, debit card, and Apple Pay, processed securely via Stripe.
