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 and the Renogy Rover 40A are evenly matched, rated 4.0 and 4.0. The BougeRV Sunflow 40A leads on efficiency. The Renogy Rover 40A wins on warranty. The BougeRV Sunflow 40A costs $20 less ($139.99 vs $159.99).
Renogy Rover 40A
#6 in MPPT solarFull review
A popular 40 A controller for 12/24 V RV and cabin systems with up to about 520 W of panels. Budget for the BT-2 module if you want app monitoring.
Amazon $159.99$159.99
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.
Which should you buy?
- Choose the BougeRV Sunflow 40A for efficiency (99% peak efficiency (maker rating) vs 98% peak efficiency (maker rating)).
- Choose the Renogy Rover 40A for warranty (3-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 | Renogy Rover 40A |
|---|---|---|
| Overall rating | 4.0/5 | 4.0/5 |
| Value 35% | 87 $3.50 per amp of charge current | 80 $4 per amp of charge current |
| Features 25% | 75 Bluetooth app, lithium profile, temperature sensor; 95 V PV limit | 69 Bluetooth add-on, lithium profile, temperature sensor; 100 V PV limit |
| Efficiency 20% | 100 99% peak efficiency (maker rating) | 75 98% peak efficiency (maker rating) |
| Warranty 20% | 12 1.5-year warranty | 50 3-year warranty |
Specifications
| BougeRV Sunflow 40A | Renogy Rover 40A | |
|---|---|---|
| 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 | Yes |
| Custom profile | Yes | - |
| Temperature sensor | - | Included |
| Peak efficiency | 99% | 98% |
| Standby draw | - | 100 mA |
| Inputs | ||
| Max PV voltage (Voc) | 95 V | 100 V |
| Max PV power (12 V) | 600 W | 520 W |
| Monitoring and build | ||
| Bluetooth | Built in | Optional add-on |
| Display | Yes | Yes |
| Load output | Yes | - |
| Cooling | passive | - |
| Water resistance | - | IP32 |
| Dimensions | - | 9.38 x 6.78 x 3.05 in |
| Warranty | 1.5 years | 3 years |