For a 120 V off-grid cabin or RV-style system that needs a UL-listed unit with a US support line. Similar hardware sells for much less under other brands.
Rich Solar $1,299.99
For a 120 V cabin, shed or backup circuit on a 48 V battery where a UL listing matters. The low-voltage solar input suits small arrays, not large roofs.
- 3.5 kWOutput
- 48 VBattery
- 4,400 WSolar input
- 50 WIdle draw
- 2 yearsWarranty
Price checked October 23, 2026. As an Amazon Associate we earn from qualifying purchases.
- UL 1741 and UL 458 listed, which eases inspection in a permitted install
- AC charger up to 120 A refills a 48 V bank fast from the grid or a generator
- Closed-loop BMS communication with compatible lithium batteries
- Two-year warranty, double that of the older Renogy 3500 W model
- 150 V solar limit means short strings of panels and heavier PV wiring
- About 50 W draw costs over 1 kWh of battery a day
- App monitoring needs the BT-2 Bluetooth module, sold separately
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its output. How we rank explains each one.
Specifications
| Model number | RIV4835PCS-1SS |
|---|---|
| Output | |
| Output voltage | 120 V single-phase |
| Continuous output | 3,500 W |
| Surge | 7,000 W |
| Peak efficiency | 95% |
| Idle draw | 50 W |
| Transfer time | 10 ms |
| Solar | |
| Max PV power | 4,400 W |
| Max PV voltage (Voc) | 150 V |
| MPPT range | 60 to 150 V |
| MPPT trackers | 1 |
| PV current per tracker | 50 A |
| Battery and grid | |
| Battery voltage | 48 V |
| Battery types | Lithium, lead-acid |
| Max charge current | 120 A |
| AC charge current | 120 A |
| Battery communication | Yes |
| Grid sell-back | No |
| UL 1741 | Yes |
| Build | |
| App monitoring | Optional add-on |
| Dimensions | 444.8 x 330 x 124 mm |
| Weight | 22.4 lb |
| Warranty | 2 years |
| Released | 2025-07 |
Alternatives in this output
A low-cost 6.5 kW off-grid inverter for big solar arrays on 120 V circuits. Pair two for a 240 V home.
MPP Solar US store $1,129The budget version of the SPH5048P for single-unit 120 V systems that will never need 240 V.
Amazon SunGoldPower $589Compare
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