Information on Batteries

Info on Marine Deep Cycle Gel Batteries


Long-time power.

Deep cycle gel / agm batteries are quite suitable for marine and other applications when there's a need for long-time power.
These batteries are maintenance-free, gas-tight, and leak-free and can even be mounted in any position, except upside-down. However, upright is the best position.


What battery capacity do you need?

Battery capacity means how many hours the battery can deliver a quantity of power, indicated in Ah (Ampere hours).

How many Ah your gel battery should have, depends on the consumption of the connected devices/appliances.

So first, you need to figure out:
- which devices do I want to supply with battery power,
- what is the wattage of these devices,
- how many hours per day will I use them at the same time.

Example of assumed power usage:
Device 1 has a wattage of 20 watts, usage: 3 hours = 60 Wh
Device 2 has a wattage of 40 watts, usage: 2 hours = 80 Wh
Device 3 has a wattage of 1100 watts, usage: 0.2 hours = 220 Wh
Total = 360 Wh
Therefore, you need 30 Ah of battery energy per day. (360 Wh / 12 V) to use these devices.

However, because you don't want to discharge the battery too far, choose a battery capacity that is three times the required energy, which means a 90Ah battery. (30 Ah x 3)


Discharge / Recharge of the gel / agm battery.

The batteries can be deeply discharged. To be on the safe side it is recommended that you don't go beyond a discharge of 70-80%. That way you can benefit from a longer battery life.
If you don't use the battery for a longer time it is advised to charge the battery once a month. You could also consider using a trickle charger.

What charger do you need?

Use a charger with the correct voltage and charging current. For example, for a 100Ah gel battery, you should use a charger with an Ah between 15 - 25 Ah (charger's Ah should be 15-25% of the battery capacity).

If you have solar panels, you might consider a solar charge controller or a DC to DC charger with dual(start battery & solar panel) input.


Launched in December 2021:

ECO-WORTHY 12V 100AH Deep Cycle GEL AGM Battery

Acording to the company, its new GEL /AGM battery is quite suitable for Solar Systems, Electric Vehicles, Golf Carts,Lawn and Garden Tools, Toys and Hobbies, UPS Systems, Industrial and Medical Equipment,Emergency Lighting, Leisure, Alarm Security, and more.

The new battery has features such as:
- Lifespan: long life: 1,500 cycles, in optimal conditions,
- Discharge: can be discharged up to 95%,
- Solar energy design,
- Faster charging speed,
- Reduced resistance,
- Weight: 61.7 lbs (27.8 kg),
- Dimensions: (L x W x H): 12.8 x 6.6 x 8.5 inches,
- Warranty: 1 year,
- Price indication: $210

For this ECO-WORTHY 12V 100AH Deep Cycle GEL AGM Battery, see the Amazon ad link here for more information, and best pricing.



12 V deep cycle gel batteries.

Below, you'll find information on well-rated 12 Volt deep-cycle gel batteries.


Weize 12V 100Ah Deep Cycle Pure Gel Battery

- Lifespan: up to 15 years, in optimal conditions
- Package weight: 67 lbs (30 kg)
- Dimensions: (L x W x H): 12.8 x 6.8 x 8.5 Inches
- Warranty: 1 year
- Price indication: $210

For this Weize 12V 100Ah Deep Cycle Gel Battery, see the Amazon ad link here for more information, reviews and best pricing.



Renogy 12V 100Ah Deep Cycle Hybrid Gel Battery

- Lifespan: up to 12 years, in optimal conditions
- Battery weight: 68 lbs (30.6 kg)
- Dimensions: (L x W x H): 13 x 6.61 x 8.5 Inches
- Warranty: 1 year
- Price indication: $265

For this Renogy 12V 100Ah Deep Cycle Hybrid Gel Battery, see the Amazon ad link here for more information, reviews and best pricing.



Mighty Max 12V 100Ah Deep Cycle Gel Battery

- Battery weight: 63.9 lbs (28.7 kg)
- Dimensions: (L x W x H): 12.9 x 6.8 x 8.7 Inches
- Warranty: 1 year
- Price indication: $220

For this Mighty Max 12V 100Ah Deep Cycle Gel Battery, see the Amazon ad link here for more information, reviews and best pricing.



Renogy 12V 200Ah Deep Cycle Hybrid Gel Battery

- Battery weight: 127.9 lbs (57.5 kg)
- Dimensions: (L x W x H): 20.6 x 9.4 x 8.8 Inches
- Warranty: 1 year
- Price indication: $400

For this Renogy 12V 200Ah Deep Cycle Hybrid Gel Battery, see the Amazon ad link here for more information, reviews and best pricing.



The LOSSIGY 12V 200Ah LiFePO4 battery

This battery is quite suitable for Marine, RV, Off-grid applications, and features:

- Capacity: (nominal)12.8V / 200Ah - max. 2,560Wh
- Built-in 100A battery management system(BMS)
- Max. load: 1280 Watts
- Discharge: low self-discharge rate
- Charging voltage: 14.6V
- Life cycles: 2000-5000 cycles
- Lifespan: up to 10 years
- Battery weight: 46 lbs (21 kg)
- Dimensions: (L x W x H): 19.05 x 6.69 x 9.45 Inches
- Warranty: 5 years - Price indication: $700

The battery comes with two connecting wires, four M8 removable terminals, manual.

For this LOSSIGY 12V 200Ah LiFePO4 battery, see the Amazon ad link here for more information, reviews and best pricing.