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 is the better charge controller overall, rated 4.0 to 2.9. The BougeRV Sunflow 40A leads on value, features and efficiency. The Morningstar ProStar MPPT 40 wins on warranty. The BougeRV Sunflow 40A costs $398.01 less ($139.99 vs $538).
Morningstar ProStar MPPT 40
#12 in MPPT solarFull review
For boats and remote installs where reliability matters more than price or app features. Most RV owners will get more for their money elsewhere.
Amazon $538$538
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.
Which should you buy?
- Choose the BougeRV Sunflow 40A for value ($3.50 per amp of charge current vs $13.45 per amp of charge current), features (Bluetooth app, lithium profile, temperature sensor; 95 V PV limit vs temperature sensor; no Bluetooth) and efficiency (99% peak efficiency (maker rating) vs 98% peak efficiency (maker rating)).
- Choose the Morningstar ProStar MPPT 40 for warranty (5-year warranty vs 1.5-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every MPPT solar charge controller; a clear win is highlighted. How we rank explains each one.
| Factor weight | BougeRV Sunflow 40A | Morningstar ProStar MPPT 40 |
|---|---|---|
| Overall rating | 4.0/5 | 2.9/5 |
| Value 35% | 87 $3.50 per amp of charge current | 0 $13.45 per amp of charge current |
| Features 25% | 75 Bluetooth app, lithium profile, temperature sensor; 95 V PV limit | 22 temperature sensor; no Bluetooth |
| Efficiency 20% | 100 99% peak efficiency (maker rating) | 75 98% peak efficiency (maker rating) |
| Warranty 20% | 12 1.5-year warranty | 100 5-year warranty |
Specifications
| BougeRV Sunflow 40A | Morningstar ProStar MPPT 40 | |
|---|---|---|
| Charging | ||
| Type | MPPT solar charge controller | MPPT solar charge controller |
| Charge current | 40 A | 40 A |
| Battery voltage | 12/24 V | 12/24 V |
| Lithium profile | Yes | - |
| Custom profile | Yes | Yes |
| Temperature sensor | - | Optional extra |
| Peak efficiency | 99% | 98% |
| Inputs | ||
| Max PV voltage (Voc) | 95 V | 120 V |
| Max PV power (12 V) | 600 W | 550 W |
| Monitoring and build | ||
| Bluetooth | Built in | No |
| Display | Yes | No |
| Load output | Yes | Yes |
| Parallel units | - | Yes |
| Cooling | passive | passive (aluminum heatsink) |
| Water resistance | - | IP20 |
| Dimensions | - | 20 x 17 x 7 cm (7.9 x 6.7 x 2.8 in) |
| Weight | - | 3.1 lb |
| Warranty | 1.5 years | 5 years |