Deep Cycle Marine Battery

Renogy 12V 200Ah RNG-BATT-AGM12-200 AGM Deep Cycle Battery

Renogy 12V 200Ah RNG-BATT-AGM12-200 AGM Deep Cycle Battery is a rather popular, general-purpose 12V 200Ah AGM battery. Renogy RNG-BATT-AGM12-200 battery is an Absorbent Mat Glass (AGM) Sealed Lead-Acid (SLA) battery that is spill-proof and maintenance-free battery, suitable for deep-cycle and standby applications, like trolling motor battery, power inverter battery, solar battery, UPS battery, RV house battery, etc.

Although it is primarily intended for deep cycle applications, Renogy RNG-BATT-AGM12-200 is, due to its size, capable of cranking rather large diesel and especially gas engines.

renogy 12v 200ah agm 1

Renogy 12V 200Ah AGM Deep Cycle Battery Features and Specifications

Renogy RNG-BATT-AGM12-200 battery is a large and heavy, but also powerful and reliable AGM SLA battery, one of the most popular batteries in its class.

Its physical dimensions are (L x W x H) 20.6 x 9.4 x 8.8 inches (522 x 240 x 224 mm) and it is slightly larger than the official BCI Group 4D battery that features maximum dimensions of (L x W x H) 20.75 x 8.75 x 9.875 inches (527 x 222 x 250 mm) - this difference is not large, but before actually buying this battery, check the size of Your battery compartment.

Renogy 12V 200Ah AGM battery weighs 129 lbs (~58.5 kg) - it comes with carrying handles and two adults can carry the battery to very short distances - these handles are more 'load and unload handles' than 'carrying handles'.

The battery features M8 terminal bolts, allowing the user to firmly attach thick-enough cables to the battery.

New, fully charged battery feature a nominal voltage of 12 volts and a nominal capacity of 200Ah - in theory.

In real life, actual capacity depends on the battery temperature and discharge rate. For example, at 77°F (25°C), the actual capacity is:

- 3 hours rate (~51 Amps): 152.9 Ah

- 5 hours rate (~34.5 Amps): 172.3 Ah

- 10 hours rate (~19 Amps): 190.5 Ah

- 20 hours rate (10 Amps): 200 Ah.

As the battery is being discharged, voltage drops - in order to prolong the operating lifetime of the battery, it is recommended not to discharge the battery below 80% DoD, preferably not below 50% DoD.

Maximum charging voltage depends on the battery use (at 77°F/25°C):

- cycle use: 14.4 - 14.8 volts (-24mV/°C),

- standby use: 13.6 - 13.8 volts (-18mv/°C).

Also, from time to time it is good practice to equalize the cells using 14.2 volts @77°F/25°C charging voltage.

Fully charged Renogy 12V 200Ah AGM battery features internal resistance of 3.5 mΩ, ensuring that the battery can provide 2000 Amps for 5 seconds - such current can easily start diesel and gas engines, but it also shows that the battery is also capable of running various industrial loads like winches, pumps, electric trolling motors, electric vehicles, power inverters, etc.

The maximum recommended charging current is 60 Amps.

renogy 12v 200ah agm 2

The discharge temperature range is from -4°F to 140°F (from -20°C to 60°C), while the charge temperature range is from 32°F to 122°F (from 0°C to 50°C).

However, the normal operating range is considered to be 77°F±9°F (25°C±5°C) and the storage temperature range from -4°F to 140°F (from -20°C to 60°C).

For an AGM battery, Renogy RNG-BATT-AGM12-200 features a relatively low self-discharge rate, which depends on the storage temperature - at 77°F (25°C), the self-discharge rate is <3% per month.

As a deep cycle battery, Renogy 12V 200Ah AGM battery is able to withstand:

- 100% DoD discharges: ~290 cycles with the capacity loss down to 80% and ~370 cycles with the capacity loss down to 60%,

- 50% DoD discharges: ~550 cycles with the capacity loss down to 80% and ~700 cycles with the capacity loss down to 60%,

- 30% DoD discharges: ~1350 cycles with the capacity loss down to 80% and ~1700 cycles with the capacity loss down to 60%.

Renogy 12V 200Ah RNG-BATT-AGM12-200 AGM Deep Cycle Battery comes with a 2-year limited warranty.

Renogy Sealed Lead-Acid 12V 200Ah Batteries

Renogy manufactures (or manufactured) several sealed lead-acid 12V 200Ah batteries, including AGM, Pure Gel, and Hybrid Gel batteries, with their most important features and specifications given in the following comparison chart:

Model

Renogy 12V 200Ah AGM

RNG-BATT-AGM12-200

Renogy 12V 200Ah Pure Gel

RNG-BATT-GEL12-200

Renogy 12V 200Ah Hybrid Gel

RBT200GEL12-G1

Photo renogy agm 12v 200ah table renogy pure gel 12v 200ah table  renogy hybrid gel 12v 200ah table 
Nominal Voltage 12 volts 12 volts 12 volts
20h Capacity
(77°F, 25°C, 10.5V)
200 Ah 200 Ah 200 Ah
Cycle Use Charge Voltage
(77°F, 25°C)
14.4 - 14.5 volts 14.2 volts 14.2 - 14.4 volts
Float Charge Voltage
(77°F, 25°C)
13.5 - 13.8 volts 13.5 volts 13.6 - 13.8 volts
50% DoD Cycles
(down to 60% capacity)
700 1100 750
BCI Battery Group 4D (6D) 4D (6D) 4D (6D)
Physical Dimensions
(L x W x H)
20.6 x 9.4 x 8.8 inches
(523 x 240 x 224 mm)
20.6 x 9.5 x 8.7 inches
(523 x 241 x 221 mm)
20.6 x 9.4 x 8.8 inches
(523 x 240 x 224 mm)
Weight 129 lbs (~58.5 kg) 128 lbs (~58 kg) 127.9 lbs (~58 kg)
Standby Life
(77°F, 25°C)
~ 10 Years ~12 Years ~12 Years
Self-Discharge Rate
(77°F, 25°C)
<3% per month <2% per month <3% per month
Maximum Charging Current 60 Amps 40 Amps 60 Amps
Internal Resistance 3.5 mΩ 5 mΩ 4.2 mΩ
Max. 5s Discharge Current 2000 Amps - 2000 Amps
Warranty 2-Year Limited 3-Year Limited 3-Year Limited
Amazon Link Renogy 12V 200 Ah AGM Battery Renogy 12V 200 Ah Pure Gel Battery Renogy 12V 200 Ah Hybrid Gel Battery

Note: Amazon affiliate links open in the new windows, feel free to check them for the most up-to-date offers and prices. All three models are often labeled as '4D' batteries, but all three models are actually a little bit wider. Also, actual charging voltages differ even in official Renogy documentation, but not by much.

As one can see, the Renogy 12V 200Ah AGM model is a very sturdy battery that can accept relatively strong charging currents and can provide strong currents (for deep cycle battery), but it also features a larger self-discharge rate, the smaller number of charging/discharging cycles, shorter warranty, etc. than Renogy 12V 200Ah Pure Gel battery.

The performances of the Renogy 12V 200Ah Hybrid Gel battery are somewhere between AGM and Pure Gel batteries, although both Renogy Gel Batteries are intended for longer discharge times than Renogy AGM battery.

Renogy RNG-BATT-AGM12-200 AGM Deep Cycle Battery Discharge Charts

The following chart lists constant current discharge values for Renogy 12V 200 Ah AGM battery, given in Amps (measured at 77°F, 25°C):

Battery End Voltage Cell End Voltage 10 min 15 min 30 min 1 hour 2 hours 3 hours 4 hours 5 hours 8 hours 10 hours 20 hours
9.6 1.60 437.1 350.7 215.6 121.5 72.34 56.35 44.20 37.60 24.12 20.00 10.37
9.9 1.65 402.6 327.9 204.3 117.3 69.92 54.62 42.88 36.42 23.93 19.81 10.31
10.2 1.70 373.1 308.4 193.7 113.6 68.05 52.31 41.56 35.43 23.55 19.43 10.18
10.5 1.75 342.3 288.9 186.0 110.0 65.44 50.96 40.42 34.45 23.17 19.24 10.00
10.8 1.80 311.5 264.5 179.2 105.1 63.20 50.00 39.48 34.00 22.79 19.05 9.903
11.1 1.85 243.8 218.9 151.9 93.83 57.80 46.54 37.02 31.30 21.46 17.90 9.811

The following chart lists constant power discharge values for Renogy 12V 200 Ah AGM battery, given in Watts (measured at 77°F, 25°C):

Battery End Voltage Cell End Voltage 10 min 15 min 30 min 1 hour 2 hours 3 hours 4 hours 5 hours 8 hours 10 hours 20 hours
9.6 1.60 4465 3670 2350 1368 820.8 642.0 511.1 427.0 282.0 235.3 124.1
9.9 1.65 4299 3568 2295 1344 798.6 625.8 498.6 415.4 279.7 233.1 123.0
10.2 1.70 4012 3378 2185 1305 778.8 601.8 482.8 405.0 276.3 228.5 121.9
10.5 1.75 3734 3188 2109 1269 750.6 587.1 471.4 395.8 271.8 226.2 119.7
10.8 1.80 3440 2947 2040 1217 733.8 583.8 462.4 390.5 267.3 224.0 118.6
11.1 1.85 2729 2476 1750 1093 675.6 544.6 435.1 361.2 252.6 211.5 117.4

Constant current and power discharge charts are very important when dimensioning the battery or battery packs - just note that these values are for brand new, fully charged batteries and that one should take into account some safety margin due to the capacity loss over time.

Note: some manufacturers often provide constant power charts for single-cell - both our charts are given for the whole battery (6-cells, 12 volts, 200 Ah).

How to Charge Renogy RNG-BATT-AGM12-200 AGM Deep Cycle Battery

Renogy 12V 200Ah battery features many uses and thus can be recharged in many ways.

If it is being used as, for example, solar/wind battery, let the battery charge controller recharge the battery according to the available power, just be sure that the charging current is less than 60 Amps.

Similarly, if You plan on using a strong AGM battery charger, don't go above 60 Amps.

For example, 'just' 30 Amps battery charger can recharge the Renogy 12V 200Ah discharged down to 50% DoD in ~4 hours - assuming that the AGM battery charger is an intelligent one, featuring test and analysis phases and that the charging process is adjusted to the battery being charged.

Many AGM battery chargers on the market that feature maximum charging current in the 25-30 Ah range are suitable for charging Renogy 12V 200Ah AGM battery - just be sure to use AGM battery charging mode with temperature compensation.

Renogy RNG-BATT-AGM12-200 AGM As A Trolling Motor Battery

Renogy RNG-BATT-AGM12-200 AGM is an excellent electric trolling motor battery - brand new, fully charged battery is able to provide 50 Amps for three hours with the voltage drop down to 10.8 volts.

So, a single Renogy 12V 200Ah AGM battery is able to power a typical 50-55 pounds thrust electric trolling motor at full throttle for 3 hours.

Since trolling motors are rarely used at full throttle, this battery features much longer runtime when being used to power such electric trolling motor.

Note: if Your electric trolling motor is being constantly used at 100% throttle, it is not well dimensioned - You practically have no extra power for emergencies. In that case, getting a stronger electric trolling motor (or second one of the same thrust) may provide extra power, just be aware that the runtime is also shorter with a stronger motor (or with one more motor of the same thrust).

Renogy RNG-BATT-AGM12-200 AGM As An Power Inverter Battery

Renogy 12V 200Ah AGM battery is often used in off-the-grid electric systems and especially in emergencies.

Due to its capacity, it can store plenty of energy and release it when required.

Since most power inverters feature efficiency in 85-90% range, in order to power such inverters, the battery must be able to provide:

- 300W power inverter: up to 353 watts - for more than 5 hours with the voltage not dropping below 11.1 volts,

- 500W power inverter: up to 589 watts - for ~3 hours, with the voltage dropping slightly below 10.5 volts,

- 1000W power inverter: up to 1177 watts - for ~1 hour, with the voltage not dropping below 10.8 volts,

- 2000W power inverter: up to 2352 watts - for 15 minutes, with the voltage not dropping below 11.1 volts.

When the lead-acid batteries are being discharged in less than an hour, their actual capacity drops significantly when compared with their nominal capacity.

On the other hand, during emergencies and in the off-the-grid situations, power inverters are used to provide power to the most essential appliances and devices like telecommunication devices, refrigerators, lights, and similar.

Nonetheless, it is good to have some spare power for powering extra devices - as such, Renogy RNG-BATT-AGM12-200 AGM can be used as an excellent power inverter battery for power inverters up to 1kW (1000W) - stronger power inverters simply discharge the battery too fast.


renogy 12v 200ah agm mLong Story Short: Renogy RNG-BATT-AGM12-200 AGM is a large, heavy, but also strong and durable lead-acid battery that can be used for a broad range of applications.

And if even larger battery packs are required, Renogy RNG-BATT-AGM12-200 AGM can be connected in series to create 24V, 36V, etc. battery packs and/or in parallel to create 200Ah, 300Ah, etc. capacity battery packs.

Note: when connecting the batteries in series and/or parallel, it is recommended to use the same batteries from the same manufacturer, preferably from the same batch.

For more reviews and recommendations, feel free to check Renogy 12V 200Ah RNG-BATT-AGM12-200 AGM Deep Cycle Battery Amazon link (link opens in the new window).



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