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header-product Uninterruptible Power Supply FSP ST 850 0.85 kVA 510 W 4 AC outlets
137.49 €

Uninterruptible Power Supply FSP ST 850 0.85 kVA 510 W 4 AC outlets

Uninterruptible Power Supply FSP ST 850 Photo 1
Uninterruptible Power Supply FSP ST 850 Photo 2
Uninterruptible Power Supply FSP ST 850 Photo 1
Uninterruptible Power Supply FSP ST 850 Photo 2
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Uninterruptible Power Supply FSP ST 850 0.85 kVA 510 W 4 AC outlets

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Short description

The FSP ST 850 is a Line-Interactive UPS with a capacity of 0.85 kVA and an output power of 510 W. It features 4 Type F AC outlets and a USB Type-B port. The 9 Ah battery operates at 12 V and has a recharge time of 6.8 hours, ensuring reliable power backup for your devices.
Available for order: 200 pcs.
Warranty: 2 Years
SKU: 10801948
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
23.09.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
28.09.2026 {{selectedOffer.courierDeliveryString}}
From 6.81 € (Weight: 7.60 kg)
Parcel couriers
Unisend LV / Latvijas Pasts pakomāts / Venipak Pickup LV / Venipak Locker LV / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa
28.09.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
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Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment
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Product information

Description

The FSP ST 850 is a reliable line-interactive uninterruptible power supply designed to protect your electronic equipment from power disturbances. With an output power capacity of 0.85 kVA and 510 W of active power, this tower-format device ensures a stable power supply for connected devices. It features four Type F AC outlets, a USB Type-B port, and a built-in 9 Ah battery operating at 12 V with a recharge time of 6.8 hours. Equipped with automatic voltage regulation, it helps reduce the impact of unstable electrical input, safeguarding your hardware against unexpected outages and voltage fluctuations.

Advantages

The FSP ST 850 offers dependable backup power during electrical outages, ensuring that connected devices remain operational or can be shut down safely. Its line-interactive topology, combined with automatic voltage regulation, helps smooth out fluctuations from the mains supply, providing a stable operating environment. The tower form factor allows for straightforward placement in home or office environments. Furthermore, the unit automatically recharges its battery once mains power is restored, ensuring it is ready for the next power event without manual intervention.

Suitable for

  • Home office computers and peripheral equipment
  • Small networking devices and routers
  • Desktop workstations and personal electronics
  • Point of sale systems and basic office hardware

When it may not be suitable

This uninterruptible power supply may not be suitable for high-power enterprise servers, heavy-duty industrial machinery, or high-draw gaming systems that exceed its 510 W output capacity. Additionally, devices requiring a continuous pure sine wave under all operating conditions may need a different topology if strict medical or scientific standards apply.

Key specifications

  • UPS topology: Line-Interactive
  • Output power capacity: 0.85 kVA
  • Output power: 510 W
  • Form factor: Tower
  • Waveform: Sine
  • Input operation voltage range: 81 V to 270 V
  • Input frequency: 50/60 Hz
  • AC outlets: 4 Type F outlets
  • Battery specifications: 9 Ah, 12 V
  • Battery recharge time: 6.8 hours
  • Product colour: Black

How to use

Place the tower unit on a flat, stable surface in a well-ventilated area away from direct sunlight and moisture. Connect the power cord of the UPS to a standard grounded wall outlet. Plug your essential electronic devices into the designated Type F AC outlets on the rear panel. Connect the USB Type-B port to a compatible computer if monitoring software is utilized. Turn on the power switch to activate the unit and begin normal operation. The internal battery will charge automatically when connected to mains power.

What to consider before purchase

  • Verify that the total power consumption of your connected devices does not exceed 510 W
  • Check the available physical space to ensure the tower form factor fits comfortably in your setup
  • Confirm that your equipment plugs are compatible with the four Type F AC outlets
  • Take into account the 6.8-hour recharge time following a complete battery discharge

Usage recommendations

Regularly test the power backup functionality by simulating a short outage to ensure optimal battery performance. Keep the ventilation openings clear of obstructions and operate the unit within recommended indoor temperature and humidity ranges to prolong battery life.

Specifications

Form factor: The shape or design of the product.
Tower
Input frequency: The frequency (Hz) which is required to power the product.
50/60
Input operation voltage (max): The maximum input voltage supported by the device.
270 V
Input operation voltage (min): The minumum voltage needed by the device during operation.
81 V
Waveform:
Sine
Output power: The power that the device can produce.
510 W
Output power capacity: The maximum power that the device can produce.
0.85 kVA
UPS topology: The two main UPS topologies are Double-Conversion True Online and Standby / Eco. Many quality-based considerations are involved when choosing the the optimal UPS for the job, like how they are coping with voltage disturbances.
Line-Interactive
Product colour: The colour e.g. red, blue, green, black, white.
Black
All features

Weight & dimensions

Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
7.6 kg
Height: The measurement of the product from head to foot or from base to top.
280 mm
Depth: The distance from the front to the back of something.
288 mm
Width: The measurement or extent of something from side to side.
99 mm

Packaging content

Batteries included:
Yes

Operational conditions

Operating relative humidity (H-H):
0 - 90
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
0 - 40

Design

Display type: Type of display (screen) e.g. LCD.
LCD
Control type: The way in which the device is controlled.
Buttons
Built-in fan:
Yes
Cooling type: The method used to cool the device or to cool the air around the device.
Active
Product colour: The colour e.g. red, blue, green, black, white.
Black
Form factor: The shape or design of the product.
Tower

Battery

Hot-swap battery:
Yes
Battery recharge time: Approximate time required to recharge the battery from completely empty to completely full
6.8 h
Number of battery cells:
1
Battery voltage: The voltage (V) of the battery.
12 V
Battery capacity: The amount of electric charge a battery can deliver at the rated voltage. The more electrode material contained in the cell the greater its capacity. A small cell has less capacity than a larger cell with the same chemistry, although they develop the same open-circuit voltage. Capacity is measured in units such as amp-hour (A·h).
9 Ah

Ports & interfaces

Ethernet LAN (RJ-45) ports: Number of Ethernet LAN (RJ-45) ports (connecting interfaces) in the device. Ethernet LAN (RJ-45) ports allow a computer to connect to the ethernet.
2
USB 2.0 ports quantity: Number of USB 2.0 ports (connecting interfaces) in the device. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), USB 2.0 ports are usually black.
1
USB port type:
USB Type-B
USB port: The device features a socket into which a USB cable can be plugged.
Yes
AC outlets quantity: The number of sockets in the device where AC electrical power can be connected.
4 AC outlet(s)
AC outlet types: The type of outlet for AC electricity.
Type F

Features

Power source type: What the power source is.
AC
Audible alarm modes:
Alarm when on battery, Fault, Low battery alarm, Overload alarm
Audible alarm(s): Alarms that make a sound when they are activated (set off).
Yes
Power protection features: Features that protect the device against power problems e.g. overload.
Battery discharge, Overcharge, Overload
Noise level: The amplitude level of the undesired background noise, usually measured in decibels (db).
40 dB
Output voltage regulation:
5
Output frequency:
50/60
Output operation voltage (max): The maximum output voltage produced by the device.
240 V
Output operation voltage (min): The minumum voltage produced by the device during operation.
110 V
Input frequency: The frequency (Hz) which is required to power the product.
50/60
Input operation voltage (max): The maximum input voltage supported by the device.
270 V
Input operation voltage (min): The minumum voltage needed by the device during operation.
81 V
Waveform:
Sine
Output power: The power that the device can produce.
510 W
Output power capacity: The maximum power that the device can produce.
0.85 kVA
UPS topology: The two main UPS topologies are Double-Conversion True Online and Standby / Eco. Many quality-based considerations are involved when choosing the the optimal UPS for the job, like how they are coping with voltage disturbances.
Line-Interactive

Description

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Customer reviews

Customer questions

FAQ

How much does the Uninterruptible Power Supply FSP ST 850 cost, and is it available for purchase?

The price is 137.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 200 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 23.09.2026 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 Uninterruptible Power Supply FSP ST 850 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the Uninterruptible Power Supply FSP ST 850 online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

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 FSP 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 FSP 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: form factor, input frequency, input operation voltage (max), input operation voltage (min), waveform, output power, output power capacity, ups topology, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.
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14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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