EVI 850VA Line-Interactive UPS
EVI 850VA Line-Interactive UPS is priced at Kes 5,300 here at Novelty Tech Solution in Nairobi, Kenya
Specifications & Features
| Spec | Detail |
|---|---|
| Capacity | 850 VA / ≈ 480 W output power. |
| Topology | Line-Interactive UPS. |
| Voltage & Outlets | Output: ~ 230 V AC, 2 universal AC outlets. |
| Input Voltage Range | About 140 V – 290 V AC for main operation. |
| Battery Type & Specs | Sealed Lead-Acid (SLA) battery, nominal 12 V; capacity: ~ 9 Ah for most models. Some variations mention 7 Ah or in some listings “7 Ah or 9 Ah depending on model”. |
| Recharge Time | Typically 6-8 hours to full (or near full) charge. |
| Runtime on Battery | Roughly 10-20 minutes, depending on load. At lower loads nearer the watts rating’s lower end, higher. |
| Output Waveform | Simulated sine wave. |
| Automatic Voltage Regulation (AVR) | Yes: includes “Boost & Buck” AVR to correct moderately low or high input voltages. |
| Cold-Start Capability | Yes (can start from battery when mains is off). |
| Indicators / Display | LED status indicators; sometimes LED panel. Audible alarm on low battery / overload. |
| Operating Temperature | ~ 0-40 °C. |
| Physical / Form Factor | Tower form factor. |
Pros
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Good power headroom for a lot of home / small office setups (480 W allows you to back up a fairly beefy desktop or several smaller devices).
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AVR helps mitigate problems of brownouts or voltage spikes without immediately draining battery. Useful in regions with unstable mains.
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Cold-start ensures backup even when mains is completely off.
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2 universal outlets useful for plugging in different devices.
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Reasonable runtime for the class; 10-20 mins gives you time to safely shut down or ride through short outages.
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Common availability and spare parts (battery, etc.) in Nairobi / East Africa.
Limitations / Things to Check
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Simulated sine wave is less ideal for very sensitive electronics, active PFC power supplies, certain audio equipment, or precise lab gear. Pure sine wave UPS tends to work better in those cases.
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Battery capacity varies: If you get the 7 Ah version vs the 9 Ah version, runtime difference can be noticeable. Always check which battery is supplied.
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Runtime drops fast as load increases. If you use something near the max 480 W, runtime may be very short (a few minutes).
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Recharge time is long (~6-8 h), so after a full discharge, need hours to get back to full backup.
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Warranty / battery lifespan: Batteries degrade; after some years capacity will drop. Check warranty on battery vs UPS unit.
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Transfer time (switching from mains to battery) might cause a brief interruption (typical for line interactive UPS). Not ideal for super-sensitive loads.
What You Should Verify / Consider
When buying / using this unit, check:
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Exactly which battery Ah rating your unit has (7 Ah vs 9 Ah).
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What kind of waveform (sometimes sellers don’t specify clearly).
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Whether your load (PC + monitor + any other devices) stays well under 480 W to get decent runtime.
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That your power outlets can physically accept “universal” plugs used.
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That the dealer provides warranty including battery.
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