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
The Renogy 40A DC-DC MPPT Charger is the better DC-DC charger overall, rated 3.2 to 2.2. The Renogy 40A DC-DC MPPT Charger leads on value. The Renogy 40A DC-DC MPPT Charger costs $434.62 less ($185.38 vs $620).
Redarc BCDC Classic 40 (BCDC1240D)
#22 in 40 A and upFull review
For overlanders who want a tough, potted charger that can live in the engine bay and take solar too. Buyers mounting inside the cabin can get similar charging for much less.
Amazon $620$620
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 40A DC-DC MPPT Charger for value ($4.63 per amp ($185.38, 40 A) vs $15.50 per amp ($620, 40 A)).
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 40A DC-DC MPPT Charger | Redarc BCDC Classic 40 (BCDC1240D) |
|---|---|---|
| Overall rating | 3.2/5 | 2.2/5 |
| Value 30% | 89 $4.63 per amp ($185.38, 40 A) | 2 $15.50 per amp ($620, 40 A) |
| Charge current 20% | 0 40 A | 0 40 A |
| Efficiency 10% | 56 93% peak efficiency | 50 efficiency not published (neutral score used) |
| Features 20% | 50 solar input, smart alternator support | 50 solar input, smart alternator support |
| Warranty 20% | 25 2-year warranty | 25 2-year warranty |
Specifications
| Renogy 40A DC-DC MPPT Charger | Redarc BCDC Classic 40 (BCDC1240D) | |
|---|---|---|
| Charging | ||
| Charge current | 40 A | 40 A |
| Input battery | 12 V | 12/24 V |
| Output battery | 12 V | 12 V |
| Battery types | AGM, gel, flooded, LiFePO4 | - |
| LiFePO4 profile | Yes | Yes |
| Smart alternator support | Yes | Yes |
| Peak efficiency | 93% | - |
| Solar | ||
| Solar input | MPPT, up to 670 W | MPPT |
| Max solar voltage | - | 32 V |
| Build | ||
| Bluetooth | No | No |
| Ingress rating | IP31 | - |
| Weight | 2.6 lb | 2.2 lb |
| Warranty | 2 years | 2 years |
| Released | 2026-08-23 | 2024-09 |