BougeRV Sunflow 40A
#5 in MPPT solarFull review
A low-cost 40 A controller with app monitoring built in, for 12/24 V van and RV systems up to about 600 W.
Amazon $139.99$139.99
The BougeRV Sunflow 40A rates 4.0 among MPPT solar charge controllers; the Redodo 12V 40A DC-DC with MPPT rates 3.3 among DC-DC ones. The BougeRV Sunflow 40A costs $26 less ($139.99 vs $165.99).
Redodo 12V 40A DC-DC with MPPT
#9 in DC-DCFull review
For budget van and trailer builds that want alternator and solar charging in one cheap box. Specs are thin, so pick it on price rather than features.
Amazon $165.99$165.99
Prices 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.
Scores side by side
These two sit in different type classes (MPPT solar and DC-DC), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | BougeRV Sunflow 40A | Redodo 12V 40A DC-DC with MPPT |
|---|---|---|
| Overall rating | 4.0/5 | 3.3/5 |
| Value 35% | 87 $3.50 per amp of charge current | 90 $4.15 per amp of charge current |
| Features 25% | 75 Bluetooth app, lithium profile, temperature sensor; 95 V PV limit | 35 lithium profile; no Bluetooth |
| Efficiency 20% | 100 99% peak efficiency (maker rating) | 38 93% peak efficiency (maker rating) |
| Warranty 20% | 12 1.5-year warranty | 25 2-year warranty |
Specifications
| BougeRV Sunflow 40A | Redodo 12V 40A DC-DC with MPPT | |
|---|---|---|
| Charging | ||
| Type | MPPT solar charge controller | DC-DC charger with MPPT solar input |
| Charge current | 40 A | 40 A |
| Battery voltage | 12/24 V | 12 V |
| Lithium profile | Yes | Yes |
| Custom profile | Yes | - |
| Temperature sensor | - | No |
| Peak efficiency | 99% | 93% |
| Inputs | ||
| Max PV voltage (Voc) | 95 V | - |
| Max PV power (12 V) | 600 W | - |
| Monitoring and build | ||
| Bluetooth | Built in | No |
| Display | Yes | - |
| Load output | Yes | No |
| Cooling | passive | - |
| Dimensions | - | 5.83 x 1.89 x 7.44 in |
| Weight | - | 2.4 lb |
| Warranty | 1.5 years | 2 years |