Victron Orion-Tr Smart 12/12-18 Isolated
#3 in Up to 30 AFull review
For boats and vehicles that need an isolated charger, or anyone who wants Victron Bluetooth and a 5 year warranty on a small house bank.
Off Grid Stores $162.19$162.19
The Victron Orion-Tr Smart 12/12-18 Isolated is the better DC-DC charger overall, rated 3.4 to 3.3. The Victron Orion-Tr Smart 12/12-18 Isolated leads on warranty and features. The ATEM POWER 25A DC-DC MPPT Charger wins on value and charge current. The ATEM POWER 25A DC-DC MPPT Charger costs $12.20 less ($149.99 vs $162.19).
ATEM POWER 25A DC-DC MPPT Charger
#4 in Up to 30 AFull review
A low cost dual input charger for a single 100 Ah battery in a 4x4 or small camper.
Amazon $149.99$149.99
Prices were last checked October 31, 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-Tr Smart 12/12-18 Isolated for warranty (5-year warranty vs 1-year warranty) and features (smart alternator support, Bluetooth, isolated vs solar input, smart alternator support).
- Choose the ATEM POWER 25A DC-DC MPPT Charger for value ($6 per amp ($149.99, 25 A) vs $9.01 per amp ($162.19, 18 A)) and charge current (25 A vs 18 A).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 30 A DC-DC charger; a clear win is highlighted. How we rank explains each one.
| Factor weight | Victron Orion-Tr Smart 12/12-18 Isolated | ATEM POWER 25A DC-DC MPPT Charger |
|---|---|---|
| Overall rating | 3.4/5 | 3.3/5 |
| Value 30% | 41 $9.01 per amp ($162.19, 18 A) | 71 $6 per amp ($149.99, 25 A) |
| Charge current 20% | 40 18 A | 75 25 A |
| Efficiency 10% | 0 87% peak efficiency | 50 efficiency not published (neutral score used) |
| Features 20% | 75 smart alternator support, Bluetooth, isolated | 50 solar input, smart alternator support |
| Warranty 20% | 100 5-year warranty | 0 1-year warranty |
Specifications
| Victron Orion-Tr Smart 12/12-18 Isolated | ATEM POWER 25A DC-DC MPPT Charger | |
|---|---|---|
| Charging | ||
| Charge current | 18 A | 25 A |
| Input battery | 12 V | 12 V |
| Output battery | 12 V | 12 V |
| Battery types | - | AGM, gel, calcium, lead acid, LiFePO4 |
| LiFePO4 profile | Yes | Yes |
| Smart alternator support | Yes | Yes |
| Peak efficiency | 87% | - |
| Isolated | Yes | - |
| Solar | ||
| Solar input | No | MPPT |
| Build | ||
| Bluetooth | Yes | No |
| Weight | 3 lb | 3.2 lb |
| Warranty | 5 years | 1 year |