Victron Orion XS 12/12-50
#1 in DC-DCFull review
The best all-round alternator charger for most vans and RVs with a 12 V lithium bank. It is small, very efficient and fully configurable from a phone.
Amazon Inverters R Us $328.10$328.10
The Victron Orion XS 12/12-50 is the better charge controller overall, rated 4.5 to 2.8. The Victron Orion XS 12/12-50 leads on efficiency, warranty and features. The Victron Orion XS 12/12-50 costs $20.90 less ($328.10 vs $349).
Kisae Abso DMT1250
#10 in DC-DCFull review
For 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 $349$349
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.
Which should you buy?
- Choose the Victron Orion XS 12/12-50 for efficiency (98.5% peak efficiency (maker rating) vs 90% peak efficiency (maker rating)), warranty (5-year warranty vs 1-year warranty) and features (Bluetooth app, lithium profile, temperature sensor, smart-alternator support; no temperature sensor vs lithium profile, temperature sensor, smart-alternator support; no Bluetooth).
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 | Victron Orion XS 12/12-50 | Kisae Abso DMT1250 |
|---|---|---|
| Overall rating | 4.5/5 | 2.8/5 |
| Value 35% | 68 $6.56 per amp of charge current | 64 $6.98 per amp of charge current |
| Features 25% | 90 Bluetooth app, lithium profile, temperature sensor, smart-alternator support; no temperature sensor | 55 lithium profile, temperature sensor, smart-alternator support; no Bluetooth |
| Efficiency 20% | 100 98.5% peak efficiency (maker rating) | 0 90% peak efficiency (maker rating) |
| Warranty 20% | 100 5-year warranty | 0 1-year warranty |
Specifications
| Victron Orion XS 12/12-50 | Kisae Abso DMT1250 | |
|---|---|---|
| Charging | ||
| Type | DC-DC charger | DC-DC charger with MPPT solar input |
| Charge current | 50 A | 50 A |
| Battery voltage | 12 V | 12 V |
| Lithium profile | Yes | Yes |
| Custom profile | Yes | Yes |
| Temperature sensor | Optional extra | Optional extra |
| Peak efficiency | 98.5% | 90% |
| Standby draw | 1.5 mA | 0 mA |
| Inputs | ||
| Max PV voltage (Voc) | - | 32 V |
| DC input range | 9 to 17 V | 10.5 to 32 V |
| Isolated | No | No |
| Smart alternator | Yes | Yes |
| Ignition sensing | Yes | Yes |
| Monitoring and build | ||
| Bluetooth | Built in | No |
| Display | No | Yes |
| Load output | No | No |
| Parallel units | Yes | - |
| Cooling | - | fan |
| Water resistance | IP65 | - |
| Dimensions | 5.4 x 4.85 x 1.6 in | 9.5 x 6.7 x 2.9 in |
| Weight | 0.7 lb | 4.1 lb |
| Warranty | 5 years | 1 years |