# Junction box HiSmart NV821808 unipolar 400A

**URL:** https://aio.lv/en/product--hismart-nv821808--10842251
**Data updated:** 2025-12-30 12:45 (EET)
**Category:** Solar Panel Accessories
**Manufacturer:** HiSmart
**Manufacturer code:** NV821808
**EAN:** 6942108747712
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 15.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hismart-nv821808--10842251

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.89 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Unipolar junction box HiSmart NV821808 rated for 400A. Designed to provide a single-pole connection point for high-current DC systems, it serves as a protective enclosure for wiring and terminal connections. Suitable for solar, battery storage and other high-current installations, it simplifies wiring layout and enhances safety by organizing and insulating live conductors.

## Long description

Unipolar junction box HiSmart NV821808 rated for 400 A. Designed as a single‑pole connection point for high‑current systems, it provides a protective enclosure for cable terminations and simplifies wiring organization in electrical distribution panels. The transparent cover allows visual inspection of the cable connections while the PA (nylon) flame‑retardant body and plated brass terminals ensure insulation, mechanical strength and reliable conductivity. The unit is intended for installation on a DIN rail and is suitable for use in solar, battery storage and other high‑current installations.
Advantages
The junction box supports nominal currents up to 400 A and voltages up to AC/DC 690–1000 V AIEC. Its transparent cover enables quick verification of connections without disassembly. The body is made of V0 UL94 flame‑retardant PA nylon, providing thermal resistance and strong insulation. Brass‑plated terminals offer good conductivity, mechanical durability and corrosion resistance. Compact dimensions and DIN‑rail mounting simplify integration into electrical panels.
Suitable for
Solar photovoltaic system DC combiner and distribution
Battery storage and inverter DC connections
High‑current single‑pole distribution in control and distribution panels
Industrial electrical installations requiring DIN‑rail mounted junctions
Key specifications
Nominal current: 400 A
Voltage: AC/DC 690–1000 V AIEC
Cable cross‑section ranges: 1× 95–185 mm² / 2× 6–35 mm² / 5× 2.5–16 mm² / 4× 2.5–10 mm²
Terminals: brass plated
Body material: PA (nylon), flame retardant, UL94 V0
Mounting: DIN rail
Dimensions: 49 × 95 × 49 mm
How to use
Mount the junction box on a standard DIN rail inside the electrical panel. Route and strip cables to the recommended cross‑section sizes, insert conductors into the appropriate terminal positions and fasten the screws to secure connections. After wiring, close the transparent cover to protect connections from dust and to allow visual inspection without disassembly. Observe polarity and system voltage ratings when installing in DC circuits.
Usage recommendations
Use suitable torque settings for terminal screws and verify tightness after initial energization. Ensure cable sizes and insulation types match the specified cross‑section ranges. Install the junction box in a dry, ventilated enclosure and comply with applicable electrical codes and safety standards.

## FAQ

### How much does the Junction box HiSmart NV821808 400A cost, and is it available for purchase?

The price is 18.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All HiSmart products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized HiSmart service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10842251/60193046_large.webp