Ritar RT12280S · Stationary UPS battery 28Ah AGM
Specifications
| Brand | RITAR |
|---|---|
| Part number | RT12280S |
| Voltage (V) | 12 |
| Capacity (C20) | 28Ah (c20) |
| Technology | AGM |
| Length | 165.00 mm |
| Width | 126.00 mm |
| Height | 174.00 mm |
| Terminal type | M6 |
Ritar RT12280S 12V 28Ah is a stationary battery for backup power systems: UPS, alarms, telecom and emergency lighting. Long float-life under permanent charge and instant response to mains outages with no noticeable voltage drop.
Why this stationary battery?
- Instant responsewhen the mains drop, no voltage dip
- Long life under 24/7 chargeoptimised for permanent service
- Compatible with your systemexisting UPS units and alarm control panels
Where it fits: the Ritar RT12280S is one of our batteries for ups / ups, belongs to our Ritar batteries and by capacity it sits among our 28Ah batteries.

Stationary battery Ritar RT12280S RT 28Ah 12V
The 12 V, 28 Ah Ritar RT12280S stationary battery from the RT range with AGM technology is designed for UPS, alarms, telecoms and emergency lighting. Measuring 165 × 126 × 174 mm, it is the direct replacement for UPS, alarm and emergency systems fitted from the factory with a 28 Ah battery of this format.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Instant response to mains failures.
- Low self-discharge and high reliability.
- Standard format for UPS and emergency systems.
What the Ritar RT12280S is for
The Ritar RT12280S is designed for UPS, alarms, telecoms and emergency lighting: it sits on float charge and responds instantly to a mains failure. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 8.80 kg and M6 terminals.
Will it fit your current battery tray?
It has external dimensions of 165 × 126 × 174 mm and weighs 8.80 kg. It uses M6 terminals, the system that anchors and connects it in the vehicle. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters.
What Ritar does differently
Ritar is one of the world's largest VRLA battery manufacturers. Its RA, RT, RL, HR and FT series equip UPS, telecoms and solar systems worldwide with very consistent quality. All the Ritar batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
The Ritar RT12280S: RT range and AGM technology
Within the Ritar catalogue, the RT series groups the references designed for this use. The RT12280S is the 28 Ah model of that family, with the same performance as its siblings in other sizes.
AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery.
Usage and maintenance tips
Replace all the batteries in the set at once and avoid environments continuously above 25 °C. Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery.
Warranty and coverage
The Ritar RT12280S comes with the manufacturer's official warranty against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you.
Delivery times and returns
Order before 6:00 pm with stock available and it leaves today: mainland Spain and Portugal receive it in 1 to 2 working days, the islands and the rest of the EU in 1 to 5 days. You have 14 days to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.
Other 28Ah batteries: We stock 11 models of 28 Ah to compare by price, technology and cold cranking: see all 28Ah batteries.
Recommended accessories
Frequently asked questions
Is this battery AGM? What is it for?
Yes: the RT12280S from Ritar uses AGM (Absorbent Glass Mat) technology, a sealed lead-acid battery whose electrolyte soaks a glass-fibre mat. It tolerates heat better and handles more cycles than a conventional battery.
What size is this battery?
Measure the battery tray before ordering: a one-millimetre difference is enough for the hold-down clamp not to close. It measures 165×126×174 mm in length × width × height, with the terminals included in the height.
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