20 09 2012 - Solar Batteries

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Energy is stored during the daylight hours and supplied through the night. The accumulators of this energy are of the rechargeable type and are divided according to the electrolyte that defines their characteristics and therefore their most suitable use. Various types of batteries are available with differing storage capacities, chemical compositions, shapes and measurements.
Mareco Luce, based on careful research and experience, has selected two specific batteries to be used in its urban solar range:

- Lithium-Ion (Li-ion) +
- Lead Acid Gel (Gel)

Lithium-Ion battery (internal)
This battery is at the cutting edge of technology and builds upon the giant steps that lithium-ion batteries have taken in recent years. Best known for their use in mobile phones, laptops and tablets these batteries have the best power-to-weight ratio for their category.
The major benefit of this battery is that it can be integrated into the light fitting without requiring a large battery box. This is possible through its compact size and resistance to elevated temperatures. The battery is fitted with a computer circuit to allow it to interact directly with the light fitting and exchange charge information.

Key advantages of Mareco Luce’s Li-Ion Battery:

- Long average life: 4-5 years*
- Integrated in the fitting
- Extremely compact
- No maintenance
- Quick-release connection
- Best power to weight ratio for its category
- Intelligent power management
- Charging to 100% of capacity always

*approximate and affected greatly by charging cycles and weather conditions of location

Technical characteristics of Mareco Luce’s Li-Ion Battery:

- Nominal voltage: 14.8V
- Voltage range: 10.8V÷16.8V.
- Nominal Capacity: 15.3Ah, 230Wh.
- Dimensions: 164x90x64mm.
- Weight: 1.35Kg.
- Temperature: -15°C÷60°C.

Anti-shock system
The anti-shock body is made of plastic material (a special mix of ABS and Polycarbonate), this coupled with the internal cell housing and the care taken during assembly guarantee that the batteries resist the wear and tear of everyday use.
Water-resistant
The “interlocking” system ensures that the body is sealed and resists bad weather; the critical areas are protected against ingress by a specially designed membrane.
Built-in power
Each single cell is tested and added into the battery pack based on the capacity, in this way improving the performance and the duration.
These batteries have the best size/capacity ratio on the market.
Cell balancing
The electronic circuitry balances the charge in the single cells so that the discharge is distributed in a uniform manner.

Lead Acid Gel Battery (external)
Gel batteries are Lead-acid accumulators where the electrolyte is not a liquid but assumes viscosity and appearance of a gelatinous substance.
The life of this battery is measured in charge/discharge cycles and it has a capacity of approximately 3800 cycles. If we consider that in normal working conditions it will be charging/discharging each day, we can calculate that 3800/365days = 10.4years. Although an average life time of 7/8 years is closer to reality.

Key advantages of Mareco Luce’s Gel Battery:
- 1200W/h capacity each battery
- Battery duration 3800 cycles of change/discharge (better than a standard

AGM Solar battery with 1500 cycles) 1 cycle=1 day of usage
- Designed for deep discharging
- No maintenance required

Technical characteristics of Mareco Luce’s Gel Battery
- Nominal Voltage: 12V
- Nominal Capacity: 100Ah, 1200Wh
- Dimensions: 306x168x211mm.
- Weight: 28.3 Kg
- Temperature range: -20°C÷50°C

Construction
The Valve Regulated Lead Acid (VRLA) or sealed battery works through the internal chemical reaction: “recombination”. They are also fitted with pressure release valves in the case of a potentially dangerous build-up of gas.
These accumulators are:
- truly Maintenance Free (MF);
- immune to the risk of accidental spillage of acid;
- suitable for installation in close proximity to people and electronic apparatus.
The gelatinous consistency of the electrolyte guarantees increased protection to the plates during discharge, thus rendering these batteries ideal for applications that require “deep” discharges.
In difficult working conditions, in terms of the number of cycles of charge-discharge and in depth of discharge, if the battery recharges properly its lifecycle is approximately 4 times longer than a standard Lead-acid battery.

Application
- Deep discharges.
- Elevated number of charge-discharge cycles.
- Installations where accidental spillage or leakage of liquid is not allowed.
- Applications where maintenance is not possible or feasible.

Specifically designed for:
- marine applications
- electrical vehicles and machinery
- emergency systems and UPS
- solar

For further information we would invite you to download our Solar Catalogue