4 modelsRiiO Sun II off-grid inverter
A transformer-based off-grid inverter with battery charger, MPPT solar controller and 4ms transfer switch, from 3kVA to 8kVA.

The earlier Raython M5, M8, M10 and M15 all-in-one systems, now succeeded by the Raython R-II and Raython M Pro.
The Raython M Series was TBB’s earlier generation of all-in-one off-grid systems, and is no longer available to buy new.
The Raython M5 and M8 are succeeded by the Raython R5-II and R8-II, and the Raython M10 and M15 by the Raython M10 Pro and M15 Pro.
| Raython M5 | 5kVA, 5.04 to 20.16kWh |
|---|---|
| Raython M8 | 8kVA, 10.08 to 20.16kWh |
| Raython M10 | 10kVA, 20.16 to 40.32kWh |
| Raython M15 | 15kVA, 30.24 to 40.32kWh |
| Model | Continuous (25°C) | Storage | AC charger | Solar charger | Max PV voltage | Weight (no battery) | Succeeded by |
|---|---|---|---|---|---|---|---|
| Raython M5 | 4000W (5000VA) | 5.04 to 20.16kWh | 70A | 120A | 600V | 150kg | Raython R5-II |
| Raython M8 | 6500W (8000VA) | 10.08 to 20.16kWh | 110A | 150A | 600V | 160kg | Raython R8-II |
| Raython M10 | 8000W (10000VA) | 20.16 to 40.32kWh | 140A | 300A | 600V | 404kg | Raython M10 Pro |
| Raython M15 | 13000W (15000VA) | 30.24 to 40.32kWh | 200A | 400A | 900V | 410kg | Raython M15 Pro |
| Inverter | Transformer-based, 48V |
|---|---|
| AC output | 220/230/240V ±2%, 50/60Hz |
| Efficiency | Up to 96% |
| Surge | 300% |
| Transfer time | 0ms (under 15ms in weak-supply mode) |
| Parallel | Up to 3 cabinets |
| Monitor | E4 with Wi-Fi |
| Dimensions | 800 × 800 × 1285mm (M5, M8); 780 × 1150 × 2000mm (M10, M15) |
| Protection rating | IP55 |
4 modelsA transformer-based off-grid inverter with battery charger, MPPT solar controller and 4ms transfer switch, from 3kVA to 8kVA.
5 modelsThe RiiO Sun II without the built-in solar charger: a transformer-based inverter charger for backup and off-grid systems, from 1kVA to 8kVA.
2 modelsA transformer-based 10kW or 15kW off-grid inverter with a built-in 600V or 900V MPPT solar controller, two AC inputs and two outputs.