Off-grid

RiiO 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.

RiiO Sun II is TBB’s workhorse off-grid inverter. It combines a pure sine wave inverter, battery charger, MPPT solar charge controller and fast transfer switch in one unit, and is built to handle demanding appliances in off-grid homes, baches, farms and lodges.

Up to nine units combine in parallel or three-phase for larger properties. A Kinergy II-WiFi data logger comes as standard for remote monitoring through NOVA.

Models

RiiO Sun II 3KVA-S	3kVA, one solar input
RiiO Sun II 5KVA-S	5kVA, two solar inputs
RiiO Sun II 6KVA-S	6kVA, two solar inputs
RiiO Sun II 8KVA-S Pro	8kVA, two solar inputs

Features

Transformer-based, with the surge capacity to start pumps, compressors and workshop tools.
Switches to battery in 4ms when the generator or grid drops out.
Dual MPPT trackers and a programmable smart port for a generator or extra loads (5, 6 and 8kVA).
Auto generator start, power control and power assist, with AC and DC coupling.
Works with a wide range of lithium batteries and generators, and can run without a battery.
Restarts automatically when solar or AC returns; monitor locally over Bluetooth or remotely through NOVA.

Where to buy Datasheets and manuals

Compare models

Model	Continuous	Peak	AC charger	Solar charger	Max PV per tracker	Smart port	Weight	Dimensions
3KVA-S	3000VA	6000W	35A	60A, 1 tracker	5200W	—	18kg	499 × 272 × 144mm
5KVA-S	5000VA	10000W	60A	100A, 2 trackers	4400W	50A	29kg	570 × 310 × 154mm
6KVA-S	6000VA	12000W	70A	100A, 2 trackers	4400W	50A	31kg	570 × 310 × 154mm
8KVA-S Pro	8000VA	16000W	90A	120A, 2 trackers	5200W	50A	34kg	620 × 320 × 164mm

Specifications

Inverter
Battery voltage	48V (42–68V)
AC output	220/230/240V ±2%, 50/60Hz
Harmonic distortion	Under 2%
Efficiency	Up to 93–95% (model dependent)
Transfer time	4ms (under 15ms in weak-supply mode)
AC input	175–265V, 45–65Hz; 32A (3kVA) or 50A transfer switch

Charging
Absorption / float	57.6V / 55.2V
Battery types	AGM, GEL, OPzV, lead-carbon, flooded, traction, lithium
PV open-circuit voltage	250V
MPPT range	65–245V
MPPT efficiency	Over 99.5%

General
Parallel and three-phase	Up to 9 units, 72kVA
Communication	RS485; Bluetooth for local setup
Remote monitoring	Kinergy II-WiFi included as standard; NOVA app and web
Programmable relay	1 (30V DC/3A or 250V AC/3A)
Operating temperature	−20°C to 65°C
Protection rating	IP21
Standards	EN-IEC 62477-1, EN-IEC 62109-1, EN-IEC 62109-2