# Dehn EM-1366\_DC Hermetic DC Connection Box IP66 with Type 2 Surge Arrester for 11 PV Strings and 11 MPPT

**URL:** https://aio.lv/en/product--dehn-em-1366dc--12537096
**Data updated:** 2026-06-25 19:49 (EEST)
**Category:** Solar Panel Accessories
**Manufacturer:** Dehn
**Manufacturer code:** EM-1366\_DC
**EAN:** 5904905311726
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 867.99 €
**Prices and availability valid until:** 2026-08-13 23:59
**Price without VAT (21%):** 717.35 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dehn-em-1366dc--12537096

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

The Dehn EM-1366\_DC is a professional hermetic DC connection box designed for photovoltaic systems. Featuring an IP66 protection rating, it ensures reliable operation in outdoor environments. Equipped with a Type 2 DC surge arrester rated for 1000V, this unit supports 11 PV strings and 11 MPPT inputs, providing essential overvoltage protection and organized cable management for large-scale solar installations.

## Long description

The Dehn EM-1366\_DC is a professional-grade hermetic DC connection box engineered specifically for large-scale photovoltaic installations. This robust unit serves as a central hub for managing solar array wiring while providing critical protection against electrical surges. With its high-performance IP66-rated enclosure, the device is fully protected against dust ingress and powerful water jets, making it an ideal choice for demanding outdoor environments where reliability and safety are paramount.
Advantages
The primary advantage of this connection box is its high capacity, supporting up to 11 individual PV strings and 11 MPPT inputs, which allows for complex solar array configurations within a single, organized unit. The integrated Type 2 DC surge arrester, rated for 1000V, offers superior protection for sensitive inverter components by diverting dangerous overvoltage transients safely to the ground. Its hermetic design ensures long-term durability and consistent performance even in harsh weather conditions, reducing the need for frequent maintenance and minimizing the risk of system downtime.
Suitable for
Large-scale commercial photovoltaic power plants
Ground-mounted solar arrays requiring centralized DC management
Systems utilizing multiple MPPT trackers for maximum energy harvest
Outdoor installations exposed to rain, snow, or high humidity
When it may not be suitable
This unit is not designed for residential systems with a small number of PV strings, as its high capacity would be underutilized. Furthermore, it is not intended for AC side protection or for systems operating at voltages exceeding the 1000V DC threshold.
Key specifications
Protection rating: IP66
Surge protection class: Type 2
Maximum operating voltage: 1000V DC
Input capacity: 11 PV strings
MPPT support: 11 inputs
Enclosure type: Hermetic
How to use
Installation should be performed by a qualified electrical professional in accordance with local safety regulations. The box should be mounted on a stable, vertical surface using the provided mounting points. Cables from the PV strings are routed through the cable glands to ensure a watertight seal. Each string must be connected to the corresponding input terminals inside the enclosure. Ensure that the grounding conductor is securely attached to the internal grounding busbar to allow the surge arrester to function correctly. After installation, verify all connections for tightness and ensure the enclosure lid is properly sealed to maintain the IP66 rating.
What to consider before purchase
Verify that your solar array configuration does not exceed 11 strings or 11 MPPT inputs
Ensure the system voltage does not exceed 1000V DC
Check the available mounting space to accommodate the dimensions of the enclosure
Confirm that the environmental conditions at the installation site are compatible with an IP66-rated device
Usage recommendations
Regularly inspect the enclosure for any signs of physical damage or moisture ingress. Periodically check the status indicator on the surge arrester module; if the indicator changes color, the module has reached the end of its service life and must be replaced immediately to maintain system protection.

## FAQ

### How much does the Dehn EM-1366\_DC Hermetic DC Connection Box for 11 PV Strings cost, and is it available for purchase?

The price is 867.99 € (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 24.07.2026 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, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Dehn EM-1366\_DC Hermetic DC Connection Box for 11 PV Strings be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Dehn 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 Dehn 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