Renogy 12V 20Ah Deep Cycle

MPN RBT1220LFP-TM

The Renogy 12V 20Ah Deep Cycle is a battery pack with a nominal voltage of 12.8 V nominal, a rated capacity of 20 Ah at 0.5C, 25°C, Lithium iron phosphate cells, dimensions of 7.13 × 3.03 × 6.61 inch, M6 × 1.25 × 10 mm bolts and a continuous discharge of 20 A.

Last updated: 21 September 2026

What we found

10 devices are compared as NOT run by it, by setting each maker's published figures against the other — neither names the pairing.
Matched to chargers, by setting each maker's published figures against the other — neither names the pairing.
Specifications are published for it, each with its source.

Battery and charging

Cells: Lithium iron phosphate
Voltage: 12.8 V nominal
Rated capacity: 20 Ah at 0.5C, 25°C
Rated charge cycles: 4000 cycles at 80% depth of discharge
Maximum continuous discharge: 20 A continuous
Series and parallel limit: Up to four in series, four in parallel
Highest charge current it will take: 20 A
Charging voltage: 14.2 V
Working voltage range: 10 V to 14.8 V

Battery care and safety

Ingress protection: IP65
Low-temperature charge protection: Charging stops at 0 °C and resumes at 5 °C
Short-circuit cut-off: 120 A, and the load has to be removed to reset it
Temperatures it may be charged in: 0 to 55°C when charging
Temperatures it may be run in: -20 to 60°C when running
Temperatures it may be stored in: -20 to 60°C in storage

Size and fit

Overall dimensions: 7.13 × 3.03 × 6.61 inch
Torque for the battery terminal nuts: 5 to 6 N·m
Stated weight: 5.95 lbs
Terminal thread: M6 × 1.25 × 10 mm bolts
Group size the maker does not name: A BCI group is claimed but never named

Other findings

Charge overcurrent protection: Trips at 30 A and recovers by itself after 8 seconds
Discharge overcurrent protection: Trips at 30 A, with a second stage at 60 A
Low temperature discharge protection: Discharge stops at −20 °C and resumes at −15 °C

Certification claims

Standards the maker claims: Nine named by the maker, none with a certificate number

Compatible chargers

These chargers are here because the published figures line up, not because anyone has said they go together — that is our reading of two documents that never mention each other, not a claim by either maker and not a test by us. Even where every figure agrees, these are not established:

Which charge profile the charger is actually set to — several publish four or more, and only one of them is this pack’s chemistry
What it holds the pack at once bulk charging ends, which is a different figure from the one it boosts to, and which some profiles do not apply at all
The charge current the pack will accept, against what the charger delivers into it
Whether the charger can restart a pack its own BMS has already disconnected
The wiring in between — where a converter feeds a distribution panel, the pack is one load on a circuit rather than a device on the end of a lead

Worth confirming with the charger's manufacturer or a dealer before buying.

Renogy state this pack's charge voltage as 14.2 V — their datasheet reads "Charge Voltage 14.2V".

Neither company names the other, and nobody has tested this pairing.

DCC50S 12V 50A DC-DC On-Board Battery Charger with MPPTSKU DCC50S12V output50AFigures comparedView charger: DCC50S 12V 50A DC-DC On-Board Battery Charger with MPPT →
THE GAP RUNS THE OTHER WAY ON THIS ONE. The pack asks for 14.2 V and the charger's Li (LFP) profile boosts to 14.4 V — two tenths above rather than below — and the pack's own stated range runs to 14.8 V, so the charger's figure is inside it. As on every lithium pairing here the charger applies no float stage, so the higher boost figure is not held indefinitely. Worth reading beside the 100Ah trolling-motor pack on the same charger, where the same 14.4 V sits BELOW that pack's stated 14.6 V: one charger setting, two Renogy packs, and it misses both in opposite directions.
WF-9500LiS Series Power ConverterFigures comparedView charger: WF-9500LiS Series Power Converter →
Set to lithium, WFCO's manual for this converter says it reaches 14.6 VDC in bulk: "boosting the output voltage to 14.6 VDC and allowing the maximum current to flow as required by the loads." That is at or above the figure the pack asks for, where the same maker's WF-8900 tops out at 14.4 V. Bulk runs between one and four hours — the one-hour minimum is for cell balancing rather than charge — and absorption then holds 13.6 V. The lithium profile is selected by a switch on the unit, and an amber LI light shows it is in that mode.
WF-9500-AD Series Power ConverterFigures comparedView charger: WF-9500-AD Series Power Converter →
This converter decides for itself: WFCO's manual says it will "evaluate the charging cycle of a battery, determine the type of battery being used, and then choose the appropriate charging program(profile)", recognising lead-acid, AGM and lithium. Once it has settled on lithium it charges in two stages and reaches 14.6 VDC in bulk, at or above the figure this pack asks for. The condition matters and is theirs, not ours: the 14.6 V depends on the converter detecting lithium.

Devices whose figures this pack does not meet

Neither maker names the other. These devices publish a draw this pack’s own maker does not rate it to deliver continuously. That is a comparison of two documents and not a manufacturer’s refusal — check both against your own equipment before deciding anything.

The motor's maker asks for 100 Ah minimum for a lead-acid or AGM battery, and 50 Ah to 100 Ah where the battery is lithium, and the battery must be able to supply 60 A of continuous current. This pack is rated 20 Ah and 20 A continuous. The pack's maker permits the series wiring this needs: "Series & Parallel (4S4P)".

Neither company names the other, and this is a comparison of two documents rather than anybody's refusal.

Compared on continuous figures only: nothing here is about surge.

This pack is rated 20 Ah and 20 A continuous.

The pack's maker permits the series wiring this needs: "Series & Parallel (4S4P)".

Minn Kota ask for “at least a 105 amp-hour rating”, in a paragraph about lead-acid: “The motor will operate with any lead acid, deep cycle marine 12-volt battery/batteries.

Source: johnsonoutdoors.widen.net/content/zp8zgjh29h/pdf/Terrova-BT-Installation-2327132rj.pdf

For best results, use a deep cycle, marine battery with at least a 105 amp-hour rating.” This pack is LiFePO4.

Progressive Dynamics PD1620 Pure Sine Wave InverterFigures compared — they do not meetView device: Progressive Dynamics PD1620 Pure Sine Wave Inverter →
Renogy rate this pack at 20 A continuous — their datasheet reads "20A" — and the PD1620 draws up to 200 A at full load by Progressive Dynamics' own figure. The pack is not rated to deliver that continuously, short by 180 A.
Progressive Dynamics PD1618 Pure Sine Wave InverterFigures compared — they do not meetView device: Progressive Dynamics PD1618 Pure Sine Wave Inverter →
Renogy rate this pack at 20 A continuous — their datasheet reads "20A" — and the PD1618 draws up to 180 A at full load by Progressive Dynamics' own figure. The pack is not rated to deliver that continuously, short by 160 A.
Progressive Dynamics PD1610 Pure Sine Wave InverterFigures compared — they do not meetView device: Progressive Dynamics PD1610 Pure Sine Wave Inverter →
Renogy rate this pack at 20 A continuous — their datasheet reads "20A" — and the PD1610 draws up to 100 A at full load by Progressive Dynamics' own figure. The pack is not rated to deliver that continuously, short by 80 A.
Garmin Force Current (10–32 V, kayak)Figures compared — they do not meetView device: Garmin Force Current (10–32 V, kayak) →
The motor's maker asks for 100 Ah minimum for a lead-acid or AGM battery, and 50 Ah to 100 Ah where the battery is lithium, and a 40 A continuous draw, which the circuit breaker is specified against.
Minn Kota Terrova 112 lb (60" shaft, CHIRP sonar, wireless remote)Figures compared — they do not meetView device: Minn Kota Terrova 112 lb (60" shaft, CHIRP sonar, wireless remote) →
For a lithium pack the same maker's thrust-to-capacity table names a different figure for this motor: “112 lb Lithium 125–150Ah 1.5–2.5 hours Heavy-duty” Those are two of Minn Kota's own numbers for two different chemistries, and an amp-hour rating does not carry from one to the other, so they are set out here rather than compared.
Source: minnkota.johnsonoutdoors.com/us/blog/selecting-best-trolling-motor-battery
Garmin Force Kraken (20–45 V, 48" to 110" shafts)Figures compared — they do not meetView device: Garmin Force Kraken (20–45 V, 48" to 110" shafts) →
Garmin Force Pro (20–45 V, 50" and 57" shafts, brushless)Figures compared — they do not meetView device: Garmin Force Pro (20–45 V, 50" and 57" shafts, brushless) →
Garmin Force (20–45 V, 50" and 57" shafts)Figures compared — they do not meetView device: Garmin Force (20–45 V, 50" and 57" shafts) →
Minn Kota Terrova 55 lb (54" shaft, wireless remote)Figures compared — they do not meetView device: Minn Kota Terrova 55 lb (54" shaft, wireless remote) →
For a lithium pack the same maker's thrust-to-capacity table names a different figure for this motor: “55 lb AGM or Lithium 100Ah 2–4 hours Most common setup” Those are two of Minn Kota's own numbers for two different chemistries, and an amp-hour rating does not carry from one to the other, so they are set out here rather than compared.
Source: minnkota.johnsonoutdoors.com/us/blog/selecting-best-trolling-motor-battery
Minn Kota Terrova 80 lb (60" shaft, wireless remote)Figures compared — they do not meetView device: Minn Kota Terrova 80 lb (60" shaft, wireless remote) →
Two in series give the right 25.6 V, so a comparison on voltage alone would pass it — and Renogy permit 4S4P, so the wiring is allowed. It fails on current: the pack sustains 20 A and this motor draws up to 56 A, nearly three times that. It would trip its own protection under load, and the 40 Ah pair is a fraction of the 100–125 Ah Minn Kota guide to for lithium on this motor: “80 lb Lithium 100–125Ah 2–3 hours Best for long days”. A pack that matches the voltage and cannot supply the current is exactly the pairing a voltage-first list gets wrong.
Source: minnkota.johnsonoutdoors.com/us/blog/selecting-best-trolling-motor-battery

Figures compared — they do not meet

Neither maker names the other. What these chargers publish and what this pack publishes do not meet, and each row below says how. That is our comparison of two documents and not a manufacturer’s refusal — check both against your own equipment before deciding anything.

WF-8900 Series Power ConverterFigures compared — they do not meetView charger: WF-8900 Series Power Converter →
Renogy state this pack's charge voltage as 14.2 V — their datasheet reads "Charge Voltage 14.2V". WFCO's own manual gives this converter a target output of 13.6 VDC in normal use, rising to 14.4 VDC only in Bulk Mode, which it leaves "until the current draw drops to approximately five Amps, or until the timer reaches four hours (whichever happens first)". So the converter's normal output is below what this pack is specified to charge at, and 14.2 V is reached only during that Bulk phase. Neither company names the other, and neither has said anything about this pairing.

Sources

Renogy 12.8V 20Ah Deep Cycle Lithium Iron Phosphate Battery — User ManualManufacturer document
Renogy
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBT1220LFP-TM-G2_12.8V_20Ah_Lithium_Iron_Phosphate_Battery_EN__UM_A1.pdf
Retrieved September 11, 2026
Renogy DCC50S — User Manual, section 6.2 Battery Charging ParametersManufacturer document
Renogy
Source: renogy.com/cdn/shop/files/RBC30D1S-G3_G4_RBC50D1S-G6_DC-DC_with_MPPT_EN__UM_B5.pdf
Retrieved September 14, 2026
WFCO WF-9500LiS Series Power Converter Operator ManualManufacturer document
WFCO Technologies
Source: forestriverinc.com/files/component-manuals/Electrical/WFCO - Power Converter Model WF-9500LiS Series Operator Manual.pdf
Retrieved September 20, 2026
WFCO WF-9500-AD Series Power Converter Operator ManualManufacturer document
WFCO Technologies
Source: forestriverinc.com/files/component-manuals/Electrical/WFCO - Power Converter Model WF-9500 -AD Series Operator Manual.pdf
Retrieved September 20, 2026
WFCO WF-8900 Series Power Converter Operator ManualManufacturer document
WFCO Technologies
Source: forestriverinc.com/files/component-manuals/Electrical/WFCO - Power Converter Model WF-8900 Series Operator Manual.pdf
Retrieved September 19, 2026
Progressive Dynamics PD1600 Series Operation GuideManufacturer document
Progressive Dynamics
Source: forestriverinc.com/files/component-manuals/Electrical/Progressive Dynamics - Inverter Model PD1600 Series Operation Guide.pdf
Retrieved September 20, 2026