Renogy 12V 60A DC-DC Charger
#6 in 40 A and upFull review
For big lithium banks on a budget, where raw current matters more than features. The short warranty and thin spec sheet are the trade-off.
Amazon $202.49$202.49
The Renogy 12V 60A DC-DC Charger is the better DC-DC charger overall, rated 3.7 to 3.4. The Renogy 12V 60A DC-DC Charger leads on value and features. The Sterling Power BB12120 120A wins on warranty and efficiency. The Renogy 12V 60A DC-DC Charger costs $560.81 less ($202.49 vs $763.30).
Sterling Power BB12120 120A
#9 in 40 A and upFull review
For boats and large RVs with a big lithium bank and an alternator rated well above 140 A.
Amazon $763.30$763.30
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 Renogy 12V 60A DC-DC Charger for value ($3.37 per amp ($202.49, 60 A) vs $6.94 per amp ($763.30, 110 A)) and features (smart alternator support, isolated vs smart alternator support).
- Choose the Sterling Power BB12120 120A for warranty (2-year warranty vs 1-year warranty) and efficiency (94% peak efficiency vs 90% peak efficiency).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 40 A and up DC-DC charger; a clear win is highlighted. How we rank explains each one.
| Factor weight | Renogy 12V 60A DC-DC Charger | Sterling Power BB12120 120A |
|---|---|---|
| Overall rating | 3.7/5 | 3.4/5 |
| Value 30% | 100 $3.37 per amp ($202.49, 60 A) | 60 $6.94 per amp ($763.30, 110 A) |
| Charge current 20% | 100 60 A | 100 110 A |
| Efficiency 10% | 22 90% peak efficiency | 67 94% peak efficiency |
| Features 20% | 50 smart alternator support, isolated | 25 smart alternator support |
| Warranty 20% | 0 1-year warranty | 25 2-year warranty |
Specifications
| Renogy 12V 60A DC-DC Charger | Sterling Power BB12120 120A | |
|---|---|---|
| Charging | ||
| Charge current | 60 A | 110 A |
| Input battery | 12 V | 12 V |
| Output battery | 12 V | 12 V |
| LiFePO4 profile | Yes | Yes |
| Smart alternator support | Yes | Yes |
| Peak efficiency | 90% | 94% |
| Isolated | Yes | - |
| Solar | ||
| Solar input | No | No |
| Build | ||
| Bluetooth | No | No |
| Weight | 5.3 lb | 4 lb |
| Warranty | 1 year | 2 years |
| Released | 2019-10 | - |