# Spare Power Supply Kit for Heating System 300W with 12V 42Ah Battery and LCD — electro base

**URL:** https://aio.lv/en/product--electro-base-inv300-42ah-lcd--5035024
**Data updated:** 2026-02-12 14:17 (EET)
**Category:** UPS
**Manufacturer:** electro base
**Manufacturer code:** INV300-42Ah LCD
**EAN:** 3100001232329
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 312.94 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 258.63 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--electro-base-inv300-42ah-lcd--5035024

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.06.2026 | free |
| Pickup points | 30.06.2026 | 1.99 EUR |
| Courier delivery to door | 30.06.2026 | 4.99 EUR |

## Summary description

Spare power supply kit for heating systems by electro base, featuring a 300W inverter/charger and a 12V 42Ah battery with LCD display (MPN INV300-42Ah LCD). Designed to provide backup power to maintain heating operation during outages, it suits small residential or commercial heating units. The integrated LCD shows battery status and basic system information for easy monitoring and maintenance.

## Long description

Spare Power Supply Kit for Heating System 300W with 12V 42Ah Battery and LCD by electro base is a compact backup power solution designed to keep small heating units operational during mains interruptions. The kit combines a 300W inverter/charger with an integrated 12V 42Ah battery and an LCD display that provides an at-a-glance view of battery status and basic system information. Its form factor and power rating suit installation near heat pumps, boilers, or electric heaters where temporary power continuity is required.
Advantages
The kit provides uninterrupted power to heating devices for short-term outages and supports automatic switching between mains and battery power. The built-in LCD delivers clear information about battery voltage, charge status and inverter mode, simplifying monitoring and basic troubleshooting. With a 300W continuous output and a 12V 42Ah capacity, the system balances runtime and compact size to fit limited spaces and typical small residential or light-commercial heating loads.
Suitable for (tasks / use cases)
Maintaining boiler control electronics and circulation pumps during short power failures
Providing temporary power to electric heaters or convectors in small apartments or offices
Ensuring uninterrupted operation of thermostats, controllers and valves in heating systems
Use as a compact backup for remote or seasonal heating installations
Key specifications
Inverter/charger continuous output: 300W
Battery type: 12V lead-acid (42Ah) integrated
Display: LCD showing battery voltage, charge level and basic system status
Nominal system voltage: 12V DC
Typical applications: small residential and light-commercial heating equipment
Physical format: compact kit intended for close-coupled installation near heating equipment
How to use
Install the kit according to local electrical codes and the heating system manufacturer’s guidelines. Mount the unit in a dry, ventilated location close to the heating equipment to minimize DC cable runs. Connect the battery and inverter/charger to the heating device’s control circuit or the device’s auxiliary power input as applicable. When mains power fails, the inverter automatically supplies AC load from the battery; the LCD allows you to check voltage and charge at a glance. Regularly inspect connections and the battery display to ensure correct operation.
Usage recommendations
For reliable performance, place the kit where ambient temperature is stable and avoid exposure to direct sunlight or moisture. Periodically verify battery charge and perform maintenance per lead-acid battery guidelines, including checking terminal tightness and cleaning corrosion. Match the kit’s 300W rating against the actual power draw of connected heating components to avoid overload; for higher continuous loads, consider a larger capacity solution.

## FAQ

### How much does the Spare Power Kit 300W 12V 42Ah LCD — electro base cost, and is it available for purchase?

The price is 312.94 € (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 25.06.2026 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. All transactions are 100% secure and encrypted.

### Can Spare Power Kit 300W 12V 42Ah LCD — electro base 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 electro base 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 electro base 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/5035024/36799364_large.webp