The Victron SmartSolar MPPT 100/20-48V and the Victron SmartSolar MPPT 75/15 are evenly matched, rated 4.3 and 4.2. The Victron SmartSolar MPPT 75/15 costs $22.95 less ($70.55 vs $93.50).
For small 48 V systems with one or two strings of panels, such as a shed, pump or backup bank. A dependable, inexpensive Victron with the app and a five-year warranty.
Amazon $96.31 DRSA $93.50The pick for small van, trailer or boat systems with one or two panels. It costs little, has a polished app and a five-year warranty.
Amazon Expion360 $70.55Prices 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.
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 | Victron SmartSolar MPPT 100/20-48V | Victron SmartSolar MPPT 75/15 |
|---|---|---|
| Overall rating | 4.3/5 | 4.2/5 |
| Value 35% | 71 $4.67 per amp of charge current | 71 $4.70 per amp of charge current |
| Features 25% | 77 Bluetooth app, lithium profile, temperature sensor; no temperature sensor | 70 Bluetooth app, lithium profile, temperature sensor; no temperature sensor |
| Efficiency 20% | 75 98% peak efficiency (maker rating) | 75 98% peak efficiency (maker rating) |
| Warranty 20% | 100 5-year warranty | 100 5-year warranty |
| Victron SmartSolar MPPT 100/20-48V | Victron SmartSolar MPPT 75/15 | |
|---|---|---|
| Charging | ||
| Type | MPPT solar charge controller | MPPT solar charge controller |
| Charge current | 20 A | 15 A |
| Battery voltage | 12/24/36/48 V | 12/24 V |
| Lithium profile | Yes | Yes |
| Custom profile | Yes | Yes |
| Temperature sensor | Optional extra | Optional extra |
| Peak efficiency | 98% | 98% |
| Standby draw | 10 mA | 10 mA |
| Inputs | ||
| Max PV voltage (Voc) | 100 V | 75 V |
| Max PV power (12 V) | 290 W | 220 W |
| Max PV power (48 V) | 1,160 W | - |
| Monitoring and build | ||
| Bluetooth | Built in | Built in |
| Display | No | No |
| Load output | Yes | Yes |
| Parallel units | Yes | Yes |
| Cooling | passive (no fan) | - |
| Water resistance | IP43 (electronics), IP22 (connection area) | IP43 (electronics), IP22 (connection area) |
| Dimensions | 100 x 131 x 60 mm | 100 x 113 x 50 mm |
| Weight | 1.4 lb | 1.3 lb |
| Warranty | 5 years | 5 years |
| Released | - | 2021-05 |
