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
3.1/5
For solar-only off-grid systems that want MidNite’s proven 200 V Classic for less money and can live without Ethernet and arc-fault protection.
- 79 ACharge current
- 12/24/36/48/60/72 VBattery
- 200 V maxPV input
- 5 yearsWarranty
Check price at Amazon$649
Price checked October 24, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 200 V input allows longer strings and thinner wire than 150 V units
- Built-in graphic display; several units coordinate charging
- Costs less than the full Classic
- Five-year warranty, extendable
Cons
- No Ethernet or arc-fault detection
- Fan-cooled, so there are parts to wear out
- Lithium charging must be set up by hand
The MidNite Classic family
Every MidNite Classic model we rank, smallest first. Ratings compare each against its own type.
| Model | Charge current | Rating | Price |
|---|---|---|---|
| MidNite Classic 250 | 60 A | 2.9/5 | $780.41 |
| MidNite Classic 250-SL | 60 A | 2.8/5 | $662.16 |
| MidNite Classic 200 | 79 A | 3.1/5 | $680 |
| MidNite Classic 200-SL (this one) | 79 A | 3.1/5 | $649 |
| MidNite Classic 150 | 96 A | 3.4/5 | $680 |
| MidNite Classic 150-SL | 96 A | 3.4/5 | $633.87 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | Classic 200-SL |
|---|---|
| Charging | |
| Type | MPPT solar charge controller |
| Charge current | 79 A |
| Battery voltage | 12/24/36/48/60/72 V |
| Lithium profile | No |
| Custom profile | Yes |
| Temperature sensor | Optional extra |
| Inputs | |
| Max PV voltage (Voc) | 200 V |
| Max PV power (12 V) | 1,137 W |
| Max PV power (48 V) | 4,550 W |
| Monitoring and build | |
| Bluetooth | No |
| Display | Yes |
| Load output | No |
| Parallel units | Yes |
| Cooling | fan |
| Water resistance | Type 1 (indoor) |
| Dimensions | 378 x 151 x 102 mm (14.87 x 5.95 x 4.00 in) |
| Warranty | 5 years |
Alternatives in this type
MidNite Classic 200
#40 in MPPT solarFull review
For off-grid homes and cabins that want a rugged, made-in-USA controller with network monitoring and longer strings than a 150 V unit. Also handles wind and hydro.
Amazon $709 NAZ Solar Electric $680$680
Morningstar TriStar MPPT 600V
#42 in MPPT solarFull review
For off-grid homes and remote sites where the array sits far from the batteries and long high-voltage strings save on copper. Overpriced for a short wire run.
NAZ Solar Electric $998$998
Compare
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