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Osaka12V 280AhTall tubularNew (Box Pack)
Osaka HT-3500 Tubular Battery 280Ah Price in Pakistan
Osaka HT-3500 Tubular Battery 280Ah price in Pakistan: Rs 41,500. 12V 280Ah · Tall tubular · 9 plates.
Rs 41,500Single battery
In Stock
15% advance Rs 6,225
On delivery Rs 35,275
✔ 7-day checking warranty · ✔ Checked before dispatch · ✔ 48–72 hours after advance payment, all over Pakistan
Osaka HT-3500 Tubular Battery 280Ah Overview
See the latest Osaka HT-3500 price in Pakistan here. The HT-3500 is a 12V 280Ah tall tubular battery from Osaka's HT ProMax Tall Tubular line, built with 9 plates. The HT-3500 suits homes with a 1.5 to 3 kVA system, usually as a pair in a 24V inverter or hybrid solar inverter, running fans, lights and a router. On a 300W load it gives about 4.8 hours of backup. Being flooded tubular, the HT-3500 needs simple distilled water top-ups and pays you back with long service in hot Pakistani summers.
Read full overview
The biggest member of Osaka's HT ProMax tall tubular line is the HT-3500, rated 280Ah at 12V with 9 plates. Osaka's page that used to show the TA-3000 now shows the HT-3500, so the older code still turns up in searches and shop lists. It is a flooded battery built for long, repeated discharge, the kind of duty a busy home inverter or solar system puts on it. Syed Non Custom Solar sells it with the rate on this page kept current.
Our backup estimate is Ah x 12 x 0.5 x 0.85 divided by the load in watts. For the HT-3500 that gives about 4.8 hours on 300W, which covers fans, LED lights and the router, and about 2.4 hours at 600W with a fridge running. Treat these as a guide; real backup falls as the battery ages or if it starts the outage only partly charged. The (Battery Backup Calculator) helps with other loads.
With this capacity, the HT-3500 suits a 1.5 to 3 kVA system, most often as a pair on a 24V inverter or hybrid solar inverter. Solar charging every day suits its 9-plate tubular build, as long as the controller is set to the flooded profile. A large wet battery like this gives off gas when charging, so it belongs in an airy corner, never a sealed box. Plan for its weight when choosing a stand.
Keep the water topped up. Every month or so, and more often in summer, open the caps and add distilled water to the marker. Do not use tap water or add acid. Clean the terminals and tighten the nuts. Osaka lists a 12-month warranty for this model; ask us how to claim before you place an order. Our (How to Check Battery Water and Top It Up Safely) guide covers the steps.
The HT-3500 has 30Ah and two plates more than the HT-2500 (250Ah, 7 plates). The HT-4000 from the HT Tall Tubular line has the same 9 plates but goes up to 330Ah, for users who want still more backup. Weighed against lithium, the HT-3500 costs less to buy and any local shop can test it, while lithium uses more of its charge and needs no water; (Lithium vs Tubular Battery: Which Is Better for Solar?) explains when each makes sense.
Osaka HT-3500 Tubular Battery 280Ah Specifications
- Voltage
- 12V
- Capacity
- 280Ah
- Battery type
- Tall tubular, flooded deep cycle
- Plates
- 9 plates per cell
- Warranty
- 12 months (brand warranty)
- Maintenance
- Top up distilled water every 1–2 months
- Best for
- UPS / inverter, Solar
All specifications
Battery
- Brand
- Osaka
- Model
- HT-3500
- Series
- HT ProMax Tall Tubular
- Type
- Tall tubular, flooded deep cycle
- Voltage
- 12V
- Capacity
- 280Ah
- Plates
- 9 plates per cell
- Construction
- Tall tubular
Use & fit
- Best for
- UPS / inverter, Solar
- Maintenance
- Top up distilled water every 1–2 months
Warranty
- Warranty
- 12 months (brand warranty)
Price last updated 12 November 2026, checked by the Syed Non Custom Solar & Batteries price team (how we check prices).
What the Osaka HT-3500 Tubular Battery 280Ah Can Run
- 2 fans + 4 LED lights + router (about 300W): about 4.8 hours
- Fridge + 2 fans + lights (about 600W): about 2.4 hours
Backup times are estimates at 50% depth of discharge (safe for lead-acid life) and normal inverter losses; real backup depends on your load and battery age.
Pros
- 280Ah tall tubular design made for daily deep discharge
- 9 plates listed, so you can match it against the label
- About 4.8 hours on a 300W fan-and-light load
- Easy to service: water top-ups and checks can be done at home
- Works with both UPS and solar inverters
Cons
- Needs distilled water top-ups every few weeks
- Heavy and gives off gas while charging, so it needs an airy spot
- Only about half the Ah is usable if you want long life, unlike lithium
More Like the Osaka HT-3500 Tubular Battery 280Ah
Delivery in Your City
Before You Buy
Osaka HT-3500 Tubular Battery 280Ah FAQs
How many hours of backup does the Osaka HT-3500 give?
About 4.8 hours on a 300W load and about 2.4 hours on a 600W load, using 50% depth of discharge and 85% inverter efficiency. A weaker charger or an older battery gives less.
What size UPS should I pair with the HT-3500?
A 280Ah 12V battery suits a 1.5 to 3 kVA system, usually as a pair in a 24V inverter or hybrid solar inverter. For the HT-3500, check that your UPS charger is set for tubular batteries so it charges fully.
How long is the HT-3500 covered?
The listed warranty is 12 months. For the HT-3500, service life depends on heat, how deep you discharge it and water care. Ask us for claim terms before you order.
Does the HT-3500 need distilled water top-ups?
Yes. It is a flooded tubular battery. For the HT-3500, check the level every 4 to 6 weeks and top up with distilled water only, up to the marker.
How many plates does the HT-3500 have?
It has 9 plates and is rated 280Ah at 12V. Weight is not on our sheet, so check the label or datasheet.
Osaka HT-3500 se kitni dair backup milay ga?
300 watt load (pankhay, bulb, router) par taqreeban 4.8 ghantay aur 600 watt (fridge + pankhay) par taqreeban 2.4 ghantay. Pani har 4-6 hafton mein check karein.
What is the Osaka HT-3500 Tubular Battery 280Ah price in Pakistan?
The Osaka HT-3500 Tubular Battery 280Ah price in Pakistan is Rs 41,500 today (November 2026). Prices follow the market and the dollar rate, so the live price on this page is always the latest.
Is this a Non Custom battery?
Syed Non Custom Solar is our store name. The Osaka HT-3500 Tubular Battery 280Ah is a new Osaka battery with the brand warranty card, charged and checked before dispatch, and delivered all over Pakistan.
How do I pay for the Osaka HT-3500 Tubular Battery 280Ah?
Pay 15% advance (Rs 6,225) by scanning our QR with any banking app and the remaining Rs 35,275 on delivery. Cash on delivery is not available at the moment.
How long does delivery take?
Delivery takes 48–72 hours after advance payment, all over Pakistan. You get a tracking number on the Track Order page.
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