LiTime 12V 40A DC-DC Charger
#8 in DC-DCFull review
A bare-bones, low-cost alternator charger for a lithium house battery in an RV or van. Spend more for smart-alternator details, monitoring or a solar input.
Amazon $155.99$155.99
The LiTime 12V 40A DC-DC Charger is the better charge controller overall, rated 3.5 to 3.3. The LiTime 12V 40A DC-DC Charger costs $10 less ($155.99 vs $165.99).
Redodo 12V 40A DC-DC with MPPT
#9 in DC-DCFull review
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.
Amazon $165.99$165.99
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every DC-DC charge controller; a clear win is highlighted. How we rank explains each one.
| Factor weight | LiTime 12V 40A DC-DC Charger | Redodo 12V 40A DC-DC with MPPT |
|---|---|---|
| Overall rating | 3.5/5 | 3.3/5 |
| Value 35% | 92 $3.90 per amp of charge current | 90 $4.15 per amp of charge current |
| Features 25% | 35 lithium profile; no Bluetooth | 35 lithium profile; no Bluetooth |
| Efficiency 20% | 50 efficiency not published (neutral score used) | 38 93% peak efficiency (maker rating) |
| Warranty 20% | 25 2-year warranty | 25 2-year warranty |
Specifications
| LiTime 12V 40A DC-DC Charger | Redodo 12V 40A DC-DC with MPPT | |
|---|---|---|
| Charging | ||
| Type | DC-DC charger | DC-DC charger with MPPT solar input |
| Charge current | 40 A | 40 A |
| Battery voltage | 12 V | 12 V |
| Lithium profile | Yes | Yes |
| Custom profile | No | - |
| Temperature sensor | No | No |
| Peak efficiency | - | 93% |
| Inputs | ||
| Isolated | Yes | - |
| Monitoring and build | ||
| Bluetooth | No | No |
| Display | No | - |
| Load output | No | No |
| Dimensions | - | 5.83 x 1.89 x 7.44 in |
| Weight | - | 2.4 lb |
| Warranty | 2 years | 2 years |