Osaka HT-4000 Tubular Battery 330Ah Price in Pakistan

The Osaka HT-4000 is the heavyweight of the HT tall tubular range: 330Ah at 12V, built on 9 plates. It is meant for houses that want long backup from a single 12V battery, or for 24V systems where two of these make a very large bank. Like the rest of the family it is a flooded tubular design, so it is tough under daily cycling and needs water from time to time. Syed Non Custom Solar shows its current rate on this page.

Backup is where this size earns its place. With our formula, Ah x 12 x 0.5 x 0.85 / watts, the HT-4000 carries a 300W load of fans, lights and a router for about 5.6 hours. With a fridge running and the total near 600W, it still gives about 2.8 hours. That is enough to ride out most load-shedding blocks in Karachi or Lahore without touching the bottom half of the battery. Run your own numbers on the (Battery Backup Calculator).

This capacity suits a 1.5 to 3 kVA setup, usually as a pair in a 24V inverter or hybrid solar inverter. On solar it pairs well with panels that refill it during the day and let it run the evening load. Make sure the charger can actually push enough current into 330Ah; a weak UPS charger will leave it under-charged, which slowly kills any lead-acid battery. It is heavy, so plan a solid stand and two people to move it.

Care: open the caps every few weeks and top up with distilled water to the mark, never above. Keep the top dry and the lugs greased. A big flooded battery gives off more gas when charging, so ventilation matters even more than with small units. The steps are in (How to Check Battery Water and Top It Up Safely). The listed warranty is 12 months; confirm the claim process with us before you order.

The HT-3500 also has 9 plates but stops at 280Ah, so the HT-4000 gives about 18 percent more stored energy from the same plate count. If that is more than you need, the HT-2500 (250Ah, 7 plates) is the next step down. Against lithium, the HT-4000 wins on upfront cost and local repair, while lithium uses more of its charge, weighs far less and lasts more cycles; see (Lithium vs Tubular Battery: Which Is Better for Solar?) before you choose.

Battery

Brand

Osaka

Model

HT-4000

Series

HT Tall Tubular

Type

Tall tubular, flooded deep cycle

Voltage

12V

Capacity

330Ah

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)