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Q 1. What is the capacity of the Rolls 4KS21P battery?

A. The Rolls 4KS21P is rated at 1148Ah at the C20 rate and 1481Ah at the C100 rate. These figures reflect the battery's deep cycle capability and suitability for sustained energy delivery over extended discharge periods.

Q 2. What voltage does the Rolls 4KS21P operate at?

A. The Rolls 4KS21P is a 4 Volt battery comprising 2 cells. It is intended for use in battery banks where multiple units are connected in series or parallel to achieve the required system voltage.

Q 3. What are the physical dimensions of the Rolls 4KS21P?

A. The battery measures 400mm in length, 238mm in width, and 629mm in height including the terminal. It weighs 121kg. These dimensions should be verified against your installation space prior to ordering.

Q 4. What polarity configuration does the Rolls 4KS21P use?

A. Polarity must be confirmed by checking the label on the product itself. Do not assume terminal orientation prior to installation. Incorrect connection can cause damage to the battery and connected equipment.

Q 5. What type of battery technology is used in the Rolls 4KS21P?

A. The Rolls 4KS21P uses standard lead-acid deep cycle technology within a dual container construction. This design is characteristic of the Series 5000 range and is intended to provide structural durability and reliable long-term performance.

Q 6. What is the warranty on the Rolls 4KS21P?

A. The Rolls 4KS21P is covered by a 5-year manufacturer's warranty. This reflects Rolls Battery Engineering's confidence in the product's durability and service life under appropriate operating conditions.

Q 7. Is the Rolls 4KS21P compatible with start-stop vehicle systems?

A. Start-stop compatibility for the Rolls 4KS21P has not been confirmed. This battery is a deep cycle unit primarily designed for stationary and industrial applications rather than automotive start-stop use. Refer to the product label for further guidance.

Q 8. Are there alternative capacity options available in the Rolls Series 5000 range?

A. Yes. Related Series 5000 variants available from PartsForMachines include the 4CS17P, 4KS25P, and 4KS27P. These models offer differing capacity ratings and may be more suitable depending on your system's energy storage requirements.

Q 9. What applications is the Rolls 4KS21P suited to?

A. The Rolls 4KS21P is designed for deep cycle applications including off-grid renewable energy storage, solar battery banks, industrial backup power, and other stationary or cyclic uses requiring sustained, high-capacity discharge over long service intervals.

Q 10. How is the Rolls 4KS21P delivered and what is the returns policy?

A. The Rolls 4KS21P is dispatched via pallet shipment and typically arrives within 35 working days to UK mainland addresses. Delivery is subject to a separate quote; please contact PartsForMachines directly for pricing. A 30-day returns policy applies to this product.

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