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 LiTime 12V 40A DC-DC Charger rates 3.5 among DC-DC ones. The BougeRV Sunflow 40A costs $16 less ($139.99 vs $155.99).
LiTime 12V 40A DC-DC Charger
#8 in DC-DCFull review
A bare-bones, low-cost alternator charger for a lithium house battery in an RV or van. Spend more for smart-alternator details, monitoring or a solar input.
Amazon $155.99$155.99
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 | LiTime 12V 40A DC-DC Charger |
|---|---|---|
| Overall rating | 4.0/5 | 3.5/5 |
| Value 35% | 87 $3.50 per amp of charge current | 92 $3.90 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) | 50 efficiency not published (neutral score used) |
| Warranty 20% | 12 1.5-year warranty | 25 2-year warranty |
Specifications
| BougeRV Sunflow 40A | LiTime 12V 40A DC-DC Charger | |
|---|---|---|
| Charging | ||
| Type | MPPT solar charge controller | DC-DC charger |
| Charge current | 40 A | 40 A |
| Battery voltage | 12/24 V | 12 V |
| Lithium profile | Yes | Yes |
| Custom profile | Yes | No |
| Temperature sensor | - | No |
| Peak efficiency | 99% | - |
| Inputs | ||
| Max PV voltage (Voc) | 95 V | - |
| Max PV power (12 V) | 600 W | - |
| Isolated | - | Yes |
| Monitoring and build | ||
| Bluetooth | Built in | No |
| Display | Yes | No |
| Load output | Yes | No |
| Cooling | passive | - |
| Warranty | 1.5 years | 2 years |