Last updated: 21 September 2026
Battery and charging
- Battery profiles it carries
- Five profiles, including lithium and a user-defined one
- Rated output power
- 720 W
“Battery Types: AGM/SLD , GEL ,FLD ,LI,USER”
Source: renogy.com/collections/dc-dc-battery-chargers/products/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt
“System Voltage 12V/24V to 12V/24V DC Nominal Output Power 720W Battery Voltage Range 9V to 32V DC”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
Battery care and safety
- Temperatures it may be stored in
- Sources disagree
−40 °C to 80 °C
“Operating Temperature Range -31ºF to 176ºF / -35ºC to 80ºC Storage Temperature -40ºF to 176ºF / -40ºC to 80ºC”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
100 °C on the product page
“Operating Temperature Range: -31℉ to 176℉/-35℃ to 80℃ Storage Temperature Range: -40℉ to 212℉/-40℃ to 100℃”
Source: renogy.com/collections/dc-dc-battery-chargers/products/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt
Size and fit
- Stated weight
- Sources disagree
3.35 lb / 1.52 kg
“Dimensions 7.01 x 4.78 x 1.47 in / 178.2 x 121.5 x 37.5 mm Weight 3.35 lb / 1.52 kg”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
4.10 lb on the product page
“Dimensions: 7.01 x 4.78 x 1.47 in/178.2 x 121.5 x 37.5mm Weight: 4.10 lb / 1.86 kg”
Source: renogy.com/collections/dc-dc-battery-chargers/products/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt
Compatibility
- Rated current, by system voltage
- 50 A on a 12-volt system, 25 A on a 24-volt one
- Battery voltage window
- 9–32 VDC — a 24-volt system as well as a 12-volt one
“Maximum Output Current Rating: 12V@50A ; 24V@25A”
Source: renogy.com/collections/dc-dc-battery-chargers/products/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt
“Output Voltage: 9-32 VDC”
Source: renogy.com/collections/dc-dc-battery-chargers/products/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt
Identity
- Model code
- RBC2125DS-21W-G3
“RENOGY Dual Input DC-DC On-Board with MPPT Battery Charger 12V/24V 50A IP67 VERSION A7 January 1, 2026 RBC2125DS-21W-G3 USER MANUAL”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
Other findings
- Dimension tolerance
- ±0.2 in, printed as ±0.5 mm
- Enclosure rating
- IP67
- Idle power consumption
- Under 100 mA with no load
- Lithium charge profile
- 14.4 V boost, adjustable 9.0–17.0 V
- Maximum solar input voltage
- 50 V of solar, 32 V of alternator
- Mounting footprint
- 123 mm between mounting holes, each 5 mm across
- Solar array limits
- 720 W, between 15 V and 50 V, and no more than 48 A
“Ø 0.2 in (5 mm) Dimension tolerance: ±0.2 in (0.5 mm)”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__QG_A6_20260101.pdf
“Maximum Operating Altitude: 3500m Enclosure Rating: IP67”
Source: renogy.com/collections/dc-dc-battery-chargers/products/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt
“No Load Current < 100mA Humidity 0% to 95%, RH, no condensation”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
“Battery Type SLD/AGM GEL FLOODED LI (LFP) User-defined User Setting Range Boost Voltage 14.4V 14.2V 14.6V 14.4V (Adjustable 9.0-17.0V) 14.4V 9.0-17.0V Float Voltage 13.8V 13.8V 13.8V — 13.8V 9.0-17.0V”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
“Max. Solar Input Voltage 50V Max. Alternator Input Voltage 32V”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
“4.84 in (123 mm) 4.06 in (103 mm) 1.46 in (37 mm) Ø 0.2 in (5 mm) 6.5 in (165 mm) 4.72 in (120 mm)”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__QG_A6_20260101.pdf
“Ensure that the solar panel parameters do not exceed 720W (15V to 50V, ≤48A); otherwise, it may cause damage to the battery charger.”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__QG_A6_20260101.pdf
Certification claims
- Certification claimed by the manufacturer
- Sources disagree
UL 1741, CE, RoHS and FCC Part 15 class B, as the maker lists them
“Certification: UL1741;CE;RoHS;FCC Part 15 class B”
Source: renogy.com/collections/dc-dc-battery-chargers/products/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt
CE, RoHS and FCC Part 15 Class B
“Certifications CE, RoHS, and FCC Part 15 Class B”
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
Sources
- 12V/24V 50A DC-DC Battery Charger with MPPT | Renogy USArchived document
Source: renogy.com/collections/dc-dc-battery-chargers/products/renogy-12v-24v-ip67-50a-dc-dc-battery-charger-with-mppt
Retrieved September 14, 2026
- Archived document
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__UM_A7_20260101.pdf
Retrieved September 21, 2026
- Archived document
Source: cdn.shopify.com/s/files/1/0631/0137/0483/files/RBC2125DS-21W-G3_12V_24V_50A_IP67_Battery_Charger_EN__QG_A6_20260101.pdf
Retrieved September 21, 2026