Browse All Our Solar Storage Batteries

Lucas solar storage batteries provide rechargeable energy storage for compatible standalone and off-grid solar installations. The sealed AGM cyclic range includes useful 12V capacities from 85Ah through to 260Ah, covering small remote systems, sheds, workshops, gates, pumps, lighting and larger professionally designed battery banks.

Selecting a solar battery requires an energy calculation rather than choosing the largest Ah figure available. Daily electrical consumption, system voltage, required autonomy, permitted depth of discharge, solar-panel output, controller settings, inverter load, temperature and expected recharge time must all be considered.

Popular AGM solar battery capacities

The Lucas LSLC cyclic range offers several useful capacity levels for solar storage:

• 12V 85Ah: suitable for compatible lower-demand systems where available space and battery weight are limited.
• 12V 104Ah: a versatile general-purpose size for many small and medium standalone installations.
• 12V 120Ah and 125Ah: medium-capacity options supplied in different physical formats.
• 12V 140Ah: additional nominal storage for systems designed around its larger dimensions and weight.
• 12V 180Ah and 200Ah: high-capacity batteries for larger loads and professionally planned banks.
• 12V 260Ah: a substantial fixed-installation battery requiring appropriate handling, support, cabling and charging equipment.

Capacities that appear close are not necessarily interchangeable. The 120Ah, 125Ah and 140Ah batteries use different cases and weights. Check the exact product dimensions, terminal type and installation requirements before ordering.

Size the system in watt-hours, not Ah alone

Amp-hours only describe capacity at a stated voltage. To compare stored energy, multiply nominal voltage by amp-hours:

• 12V × 85Ah: 1,020Wh nominal energy.
• 12V × 104Ah: 1,248Wh nominal energy.
• 12V × 120Ah: 1,440Wh nominal energy.
• 12V × 140Ah: 1,680Wh nominal energy.
• 12V × 200Ah: 2,400Wh nominal energy.

Nominal watt-hours are not the same as usable energy. AGM batteries should not be treated as though their complete rated capacity is available on every cycle. The permitted depth of discharge, discharge rate, temperature, battery age and conversion losses all reduce practical runtime. Use the Lucas technical data and system designer's limits when calculating usable storage.

Calculate daily solar energy requirements

List every load in watts and multiply it by the number of hours it operates each day. Add the results to calculate daily watt-hours, then allow for inverter, wiring and controller losses. Include equipment that starts automatically overnight or during poor weather.

The battery bank must support the required load while retaining an appropriate reserve, and the solar array must be capable of returning the energy used. A large battery connected to an undersized solar panel may remain partly charged and suffer reduced service life.

12V, 24V and 48V solar battery banks

Multiple identical 12V batteries can be connected to create a higher-voltage or higher-capacity bank. The wiring arrangement changes the result:

• Parallel connection: keeps the same voltage and adds Ah capacity. Two 12V 100Ah batteries in parallel form a 12V 200Ah bank.
• Series connection: adds voltage while Ah remains the same. Two 12V 100Ah batteries in series form a 24V 100Ah bank.
• Four in series: four matched 12V 100Ah batteries form a 48V 100Ah bank.

Series and parallel banks require correctly sized cables, over-current protection, isolation and balanced connection methods. Improper wiring can cause uneven loading, overheating, equipment damage or serious injury. Larger battery banks should be designed and installed by a competent solar or electrical professional.

Use matched batteries in every solar bank

Batteries operating together should be the same Lucas model, technology, voltage, capacity and age. Do not combine a new battery with an older unit or mix 104Ah, 120Ah and 140Ah batteries within one series or parallel bank.

Differences in internal condition can cause unequal charging and discharge, leaving one battery overworked while another remains underused. If one battery in an established bank fails, test the complete bank and obtain professional advice before replacing a single unit.

AGM cyclic batteries for solar storage

Lucas LSLC batteries use sealed AGM/VRLA construction and are intended for cyclic operation. This makes them more appropriate for compatible solar storage than an automotive starter battery designed primarily to deliver a brief burst of cranking current.

Sealed does not mean that installation requirements can be ignored. Batteries must be secured upright in an approved location, protected against short circuits and installed with the ventilation, spacing and temperature control required by the manufacturer and applicable system design.

Match the solar charge controller

The solar charge controller must support the battery-bank voltage, AGM chemistry and required charging current. Its absorption, float, temperature-compensation and other settings should follow the current Lucas charging specification.

Do not rely on a controller's generic AGM label without checking its actual voltage settings. Connecting a larger battery bank does not automatically increase available charging current, so confirm that the solar array and controller can recharge the bank within an appropriate period.

Inverter size and battery current

High-power inverters can draw a large current from a 12V battery bank. For example, a heavy AC load may demand far more battery current than its mains-side amperage suggests. Inverter rating, peak starting surge, battery-cable size, fuse protection and permitted battery discharge current must be considered together.

A high Ah rating does not automatically make a single battery suitable for every inverter. Obtain a professional load and cable calculation for pumps, refrigeration, power tools, heaters or other equipment with substantial continuous or starting demands.

AGM solar batteries and lithium storage are different

AGM and lithium batteries have different charging limits, permitted depths of discharge, management requirements, weights and operating characteristics. A controller or inverter setting intended for AGM must not automatically be used for lithium, and lithium equipment containing a battery-management system must be integrated in accordance with its manufacturer.

These Lucas AGM cyclic batteries are not direct replacements for proprietary high-voltage wall-mounted home batteries connected to a grid-tied or hybrid inverter. Domestic grid-connected storage normally requires a compatible certified system and professional installation.

Where Lucas solar storage batteries can be used

Subject to correct professional sizing and installation, compatible AGM cyclic batteries may support solar-powered lighting, remote monitoring, electric gates, agricultural equipment, pumps, sheds, workshops, cabins and other standalone electrical systems.

Application labels are only a guide. Confirm the actual daily load, charging opportunity and environmental conditions rather than assuming one battery size will suit every gate, shed or off-grid building.

Find the correct Lucas solar storage battery

Browse the Lucas solar storage batteries above by voltage, Ah capacity, nominal watt-hours, dimensions, terminal type and weight. If you need help comparing products, send us the system voltage, daily watt-hour usage, solar-panel wattage, controller and inverter models, required days of autonomy and available installation space. Final bank design, wiring and protection should be confirmed by a competent solar installer.