Redodo 12V 40A DC-DC with MPPT

Last updated: October 31, 2026

Redodo 12V 40A DC-DC with MPPT
3.1/5#13 of 22 in 40 A and up DC-DC chargers
3.1

For budget van and trailer builds that want alternator and solar charging in one cheap box. Specs are thin, so pick it on price rather than features.

  • 40 ACharge current
  • MPPTSolar input
  • 93%Efficiency
  • 2 yearsWarranty
Check price at Amazon$165.99

Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • Alternator and solar input for well under $200
  • Recharges a 100 Ah lithium battery in about 2.5 hours of driving
  • Can wake a LiFePO4 battery whose BMS has shut off
  • Anderson connectors make wiring quick
Cons
  • No app, display or custom voltages; status is on LEDs
  • Solar input limits and alternator input range aren’t published
  • No temperature sensor

How it scores

The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its current. How we rank explains each one.

Specifications

Model numberR12V40A-DC-Z
Charging
Charge current40 A
Output battery12 V
LiFePO4 profileYes
Peak efficiency93%
Solar
Solar inputMPPT
Build
BluetoothNo
Weight2.4 lb
Warranty2 years
Released2023-07

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