Batteries

Rolls 4000 Series

£ 177.87GBP · price may vary

Model: RB-S12-24
Specifications: 5

System Battery Voltage12V
Storage Capacity (C100)106Ah
Storage Capacity (C20)85Ah
Storage Capacity (C10)72Ah
Weight (kg)21

Overview

Durable batteries designed for deep cycling service in renewable energy applications. Thick plate design with high density active material and increased liquid reserve. Polypropylene rigid container construction. Supplied fully charged. 1280 cycles to 50% DOD (depth of discharge) 800 cycles to 80% DOD 3 year warranty Please note the RB-S12-24, RB-S12-27 and RB-S12-31 do not have quarter turn caps so are not compatible with Rolls Level Indicators or Water Miser Caps.

Specifications

System Battery Voltage	12V
Storage Capacity (C100)	106Ah
Storage Capacity (C20)	85Ah
Storage Capacity (C10)	72Ah
Weight (kg)	21

Reading the specifications

Rolls 4000 Series is listed with 5 published specifications from Rolls Battery, including system battery voltage of 12V, storage capacity (C100) of 106Ah, storage capacity (C20) of 85Ah and storage capacity (C10) of 72Ah. Those figures are what decide whether this unit fits your system, so read them against the equipment it will connect to before comparing price.

For a battery, the figures that matter most are communication protocol (CAN or RS485) for talking to the inverter, nominal capacity in ampere-hours (Ah) or kilowatt-hours (kWh), usable capacity after depth of discharge — LiFePO4 typically allows 80–100%, lead-acid closer to 50% and system voltage: 12 V, 24 V and 48 V for low-voltage packs, or a high-voltage stack. Storage is what turns a solar array from a daytime bill-reducer into a system that covers evening loads and rides through outages. It is normally the single most expensive component, so sizing it correctly matters more than with any other part.

Choosing a battery: the checks that matter

The checks below apply to any battery. Run them against the specification table above — most disappointing solar purchases are compatible-on-paper units that fail one of these in practice.

Leave room to expand. Packs that parallel cleanly let you add capacity later; ones that do not force a full replacement.
Compare usable kilowatt-hours, not nameplate capacity. A 100 Ah lead-acid battery at 12 V is nominally 1.2 kWh but only about 0.6 kWh is safely usable, while a 100 Ah LiFePO4 pack gives you roughly 1.0–1.2 kWh.
Size from your evening consumption. Add up what actually runs after sunset for the hours you want covered, then divide by the usable capacity per unit — that number, not the array size, sets how many batteries you need.
Check the continuous discharge rating against your inverter. A battery that stores plenty of energy but can only deliver 50 A cannot support a large inverter at full output.

Where buyers lose money

Mixing old and new batteries, or different chemistries, in one bank. The weakest unit drags the whole bank down and can be damaged by the others.
Sizing the bank for total daily consumption rather than after-dark consumption, which typically doubles the cost for no benefit.
Installing lithium packs in an unventilated, hot enclosure. Sustained high temperature is the fastest way to lose cycle life.

Price and availability

Rolls 4000 Series is listed at £ 178 (GBP). Solar pricing moves with supply, import duties and exchange rates, and distributors set their own margins, so treat this as a comparison reference and confirm the current figure before you order.

SolarBazaar compares equipment rather than selling it. Shortlist here on specification and price, then buy from an authorised distributor or installer in your country: warranty cover on solar hardware is normally honoured through the channel you bought from, so confirm who supports Rolls Battery locally before ordering.

Rolls 4000 Series — frequently asked questions

How much does Rolls 4000 Series cost?

Rolls 4000 Series is listed at £ 178 (GBP). The figure is indicative — solar prices move with supply, duties and exchange rates, and each distributor sets its own margin — so confirm the current price with a supplier before ordering.

What are the specifications of Rolls 4000 Series?

We hold 5 published specifications for this battery, including system battery voltage 12V, storage capacity (C100) 106Ah, storage capacity (C20) 85Ah, storage capacity (C10) 72Ah and weight (kg) 21. The full table is on this page, listed under model RB-S12-24.

Who makes Rolls 4000 Series?

Rolls 4000 Series is a Rolls Battery product, listed under batteries with model reference RB-S12-24. The Rolls Battery brand page lists the rest of its range so you can compare across the catalogue.

Is Rolls 4000 Series right for my system?

That depends on what it has to connect to. For a battery, check round-trip efficiency, around 90–95% for lithium and 75–85% for lead-acid, communication protocol (CAN or RS485) for talking to the inverter and nominal capacity in ampere-hours (Ah) or kilowatt-hours (kWh) against the rest of your equipment before price enters the decision. Compare usable kilowatt-hours, not nameplate capacity. A 100 Ah lead-acid battery at 12 V is nominally 1.2 kWh but only about 0.6 kWh is safely usable, while a 100 Ah LiFePO4 pack gives you roughly 1.0–1.2 kWh.

Where can I buy Rolls 4000 Series?

SolarBazaar lists and compares equipment rather than selling it. Use the specifications and price here to shortlist, then buy through an authorised distributor or installer — buying in-channel is what keeps the manufacturer's warranty valid.

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