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.
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
| Model number | R12V40A-DC-Z |
|---|---|
| Charging | |
| Type | DC-DC charger with MPPT solar input |
| Charge current | 40 A |
| Battery voltage | 12 V |
| Lithium profile | Yes |
| Temperature sensor | No |
| Peak efficiency | 93% |
| Monitoring and build | |
| Bluetooth | No |
| Load output | No |
| Dimensions | 5.83 x 1.89 x 7.44 in |
| Weight | 2.4 lb |
| Warranty | 2 years |
For boats and big RV banks that need lots of alternator current and fine control over charge voltages. Van builders short on space will find the Orion XS smaller and easier.
Amazon $318.75A 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 $155.99For RV owners who want 50 A and a wired remote display without paying Victron or Redarc prices. The short warranty and one-source-at-a-time design hold it back.
Amazon $349Compare the Redodo 12V 40A DC-DC with MPPT with any other charge controller →
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