The Sterling Pro Batt Ultra BB1260 is the better charge controller overall, rated 3.5 to 2.8. The Sterling Pro Batt Ultra BB1260 leads on value and warranty. The Sterling Pro Batt Ultra BB1260 costs $30.25 less ($318.75 vs $349).
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 $318.75For 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 $349Prices 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.
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 | Sterling Pro Batt Ultra BB1260 | Kisae Abso DMT1250 |
|---|---|---|
| Overall rating | 3.5/5 | 2.8/5 |
| Value 35% | 79 $5.31 per amp of charge current | 64 $6.98 per amp of charge current |
| Features 25% | 55 lithium profile, temperature sensor, smart-alternator support; no Bluetooth | 55 lithium profile, temperature sensor, smart-alternator support; no Bluetooth |
| Efficiency 20% | 50 efficiency not published (neutral score used) | 0 90% peak efficiency (maker rating) |
| Warranty 20% | 25 2-year warranty | 0 1-year warranty |
| Sterling Pro Batt Ultra BB1260 | Kisae Abso DMT1250 | |
|---|---|---|
| Charging | ||
| Type | DC-DC charger | DC-DC charger with MPPT solar input |
| Charge current | 60 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 | - | 90% |
| Standby draw | 1 mA | 0 mA |
| Inputs | ||
| Max PV voltage (Voc) | - | 32 V |
| DC input range | 11 to 20 V | 10.5 to 32 V |
| Isolated | - | No |
| Smart alternator | Yes | Yes |
| Ignition sensing | Yes | Yes |
| Monitoring and build | ||
| Bluetooth | No | No |
| Display | - | Yes |
| Load output | No | No |
| Cooling | fan | fan |
| Water resistance | IP21 | - |
| Dimensions | 190 x 160 x 70 mm | 9.5 x 6.7 x 2.9 in |
| Weight | 3.1 lb | 4.1 lb |
| Warranty | 2 years | 1 years |
