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
3.2/5
A low cost dual input charger for a small van with a couple of 12 V panels and a lithium battery.
- 40 ACharge current
- MPPT, up to 600 WSolar input
- 93%Efficiency
Check price at LiTime$209.99
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Alternator and solar charging in one box for about $210
- Smart alternator support through the ACC wire
- Emergency reverse charge can start the vehicle from the house battery
Cons
- 26 V solar limit means panels must be wired in parallel
- Sold only on LiTime’s own store
- Warranty term not published for this model
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its current. How we rank explains each one.
Specifications
| Charging | |
|---|---|
| Charge current | 40 A |
| Input battery | 12 V |
| Output battery | 12 V |
| Battery types | LiFePO4, AGM, gel, SLA, calcium |
| LiFePO4 profile | Yes |
| Smart alternator support | Yes |
| Peak efficiency | 93% |
| Solar | |
| Solar input | MPPT, up to 600 W |
| Max solar voltage | 26 V |
| Build | |
| Bluetooth | No |
| Weight | 2.4 lb |
| Released | 2023-07-12 |
Alternatives in this current
VEVOR 40A DC-DC MPPT Charger
#10 in 40 A and upFull review
For a budget build where price matters most and the vehicle has a conventional alternator.
Amazon $121.90$121.90
Renogy 40A DC-DC MPPT Charger
#12 in 40 A and upFull review
A cheap dual input charger for a van with a 200 Ah lithium bank and a modest solar array.
Amazon $185.38$185.38
Compare
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