# Storage water heater Sunsystem SWPNL300 — 300 L capacity with 3.3 m internal heat exchanger

**URL:** https://aio.lv/en/product--sunsystem-swpnl300--11461987
**Data updated:** 2026-02-15 12:38 (EET)
**Category:** Water Heaters
**Manufacturer:** Sunsystem
**Manufacturer code:** SWPNL300
**EAN:** 2000001355329
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 720.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 595.86 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sunsystem-swpnl300--11461987

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Wednesday | free |
| Courier delivery to door | 22.06.2026 | 53.99 EUR |

## Summary description

The Sunsystem SWPNL300 is a storage water heater with 300 L capacity and a 3.3 m internal heat exchanger designed to store domestic hot water and accept heat from an external source. It integrates with boilers, solar thermal or other heating systems to provide large-volume hot water for residential or small commercial installations, simplifying heat transfer and ensuring reliable supply.

## Long description

The Sunsystem SWPNL300 is a storage water heater with a 300‑litre capacity and a 3.3‑metre internal heat exchanger designed to store domestic hot water and receive heat from an external source. The cylinder is intended for integration with boilers, solar thermal collectors or other central heating systems, enabling large‑volume hot water supply for residential and small commercial installations. The internal coil ensures efficient heat transfer while keeping potable water separated from the heating circuit.
Advantages
The Sunsystem SWPNL300 combines a high storage volume with an extended internal heat exchanger that increases contact area for better energy transfer. It supports connection to multiple heat sources and reduces the need for frequent heating cycles. The construction provides corrosion protection and thermal insulation to maintain water temperature over longer periods, and the unit is compatible with standard plumbing and control components used in domestic heating projects.
Suitable for
 Residential systems requiring large domestic hot water storage
 Small commercial premises such as guesthouses or offices
 Integration with solar thermal panels for seasonal heat storage
 Combination with boilers, heat pumps or other external heat sources
Key specifications
 Storage capacity: 300 litres
 Internal heat exchanger length: 3.3 metres
 Function: indirect storage water heater with internal coil
 Application: domestic hot water storage and heat exchange from external sources
 Typical installation site: indoor plant room or utility area
How to use
Install the Sunsystem SWPNL300 according to local plumbing and safety standards, positioning the cylinder on a stable, level base with adequate access for pipework and maintenance. Connect the internal heat exchanger to the chosen heat source circuit using appropriate fittings, valves and safety devices. Fill and vent the system, then commission by gradually heating and checking for leaks, proper flow through the heat exchanger, and correct operation of thermostats and safety controls. Regularly inspect insulation and connections and follow the manufacturer's maintenance recommendations for water quality and anode inspection where applicable.
Usage recommendations
For optimal performance, match heat source output and flow rate to the internal exchanger size, maintain water quality to reduce corrosion and scaling, and include appropriate safety valves and expansion vessels in the installation. Consider professional installation and periodic servicing to ensure reliable long‑term operation.

## FAQ

### How much does the Sunsystem SWPNL300 storage water heater 300 L cost, and is it available for purchase?

The price is 720.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 Wednesday 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: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Sunsystem SWPNL300 storage water heater 300 L 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 Sunsystem 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 Sunsystem 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/11461987/66099166_large.webp