LiTime 100A MPPT Bluetooth
#2 in MPPT solarFull review
The cheapest way to put about 6,000 W of panels on a 48 V bank, with Bluetooth included. Good for budget off-grid builds that can live with a fan and a short track record.
Amazon $309.99$309.99
The LiTime 100A MPPT Bluetooth is the better charge controller overall, rated 4.4 to 3.1. The LiTime 100A MPPT Bluetooth leads on value and features. The OutBack FLEXmax 100 AFCI wins on warranty and efficiency. The LiTime 100A MPPT Bluetooth costs $1,184.67 less ($309.99 vs $1,494.66).
OutBack FLEXmax 100 AFCI
#39 in MPPT solarFull review
For large 48 V off-grid or backup systems built around OutBack inverters, where 300 V strings and built-in arc-fault protection simplify the install.
NAZ Solar Electric $1,494.66$1,494.66
Prices were last checked October 24, 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 LiTime 100A MPPT Bluetooth for value ($3.10 per amp of charge current vs $14.95 per amp of charge current) and features (Bluetooth app, lithium profile, temperature sensor, 150 V PV input vs temperature sensor, 300 V PV input; no Bluetooth).
- Choose the OutBack FLEXmax 100 AFCI for warranty (5-year warranty vs 3-year warranty) and efficiency (98.8% peak efficiency (maker rating) vs 98% peak efficiency (maker rating)).
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 | LiTime 100A MPPT Bluetooth | OutBack FLEXmax 100 AFCI |
|---|---|---|
| Overall rating | 4.4/5 | 3.1/5 |
| Value 35% | 92 $3.10 per amp of charge current | 0 $14.95 per amp of charge current |
| Features 25% | 100 Bluetooth app, lithium profile, temperature sensor, 150 V PV input | 30 temperature sensor, 300 V PV input; no Bluetooth |
| Efficiency 20% | 75 98% peak efficiency (maker rating) | 95 98.8% peak efficiency (maker rating) |
| Warranty 20% | 50 3-year warranty | 100 5-year warranty |
Specifications
| LiTime 100A MPPT Bluetooth | OutBack FLEXmax 100 AFCI | |
|---|---|---|
| Charging | ||
| Type | MPPT solar charge controller | MPPT solar charge controller |
| Charge current | 100 A | 100 A |
| Battery voltage | 12/24/36/48 V | 24/36/48 V |
| Lithium profile | Yes | - |
| Custom profile | - | Yes |
| Temperature sensor | Included | Optional extra |
| Peak efficiency | 98% | 98.8% |
| Standby draw | 10 mA | 104 mA |
| Inputs | ||
| Max PV voltage (Voc) | 150 V | 300 V |
| Max PV power (12 V) | 1,500 W | - |
| Max PV power (48 V) | 6,000 W | 7,000 W |
| Monitoring and build | ||
| Bluetooth | Built in | No |
| Display | Yes | No |
| Load output | No | No |
| Cooling | fan + heat sink | fan |
| Water resistance | IP21 | IP54 (Type 3R) |
| Dimensions | 252 x 201 x 80.3 mm | 58.4 x 22.4 x 15.2 cm (23 x 8.8 x 6 in) |
| Weight | 5.5 lb | 16 lb |
| Warranty | 3 years | 5 years |
| Released | 2025-06 | - |