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epever
Epever Tracer 4210AN 40A MPPT Charge Controller
8.0/10 Great
Epever Tracer 4210AN 40A MPPT charge controller review. True MPPT tracking under $100, RS-485 Modbus, 520W solar on 12V. The DIY solar community's favorite budget controller.
$100
Check Price on Amazon $130
Save $30
Last updated: 2026-04-08
Score Breakdown
Power 8.0/10
Portability 8.5/10
Value 9.5/10
Features 7.5/10
Build Quality 7.5/10
Pros & Cons
What We Like
- Unbeatable price — true MPPT performance under $100
- RS-485 Modbus port for custom monitoring and integration
- 40A charge current handles up to 520W on 12V systems
- Multi-stage charging with customizable battery profiles
- Widely used and well-documented by the DIY solar community
Watch Out For
- No Bluetooth or display — requires optional MT50 remote meter
- IP30 rating — must be mounted indoors
- 2-year warranty is short
- Build quality is functional but not premium
Full Specifications
| Controller Type | MPPT |
| Max Solar Input V | 100 |
| Max Charge Current A | 40 |
| Max Solar Input W 12v | 520 |
| Max Solar Input W 24v | 1040 |
| Battery Voltage | 12/24V auto |
| Efficiency Pct | 96 |
| Weight | 3.3lbs |
| Dimensions | 7.5 x 5.1 x 2.6 in |
| Bluetooth Built In | false |
| App Control | Yes |
| Programmable | true |
| Display | false |
| Operating Temp | -13 to 131F |
| Warranty | 2 years |
| IP Rating | IP30 |
| Rs485 Modbus | true |
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