Belnem House Bonaire (https://www.belnemhousebonaire.nl) is a new and exclusive off-grid resort, unique on the beautiful island of Bonaire. The entire resort is completely off-grid. All electric power is supplied by solar panels. An MG lithium-ion battery bank with a capacity of 430 kWh stores the electricity and supplies it to the resort during the day and at night.
The aim of the client was to introduce the first off-grid resort on the island in its size, by producing the required energy of around 500 kWh per day with rooftop solar energy. Engineering a smart energy storage system is the key factor to achieve this autonomous way of living.
The off-grid system
Off-Grid Factory therefore designed and installed a complete energy system for the resort, containing 130 kWp of solar, 100 kW SMA Core1 solar inverters, Victron MPPT RS charge controllers and 135 kVA Victron inverter/chargers. The heart of the system is the battery pack, which contains 60 pieces MG LFP lithium-ion batteries with a total capacity of 430 kWh. The battery bank runs on a safe 48 V voltage level, controlled by four MG Masters LV.
These Masters LV 1000 PC+ are special versions with an extra heavy-duty precharge. This has been specially developed for use with, for example, 3x 15 kVA Victron Quattro combination inverter/battery chargers.
MG Battery Bank in Combined Mode (SmartLink MX)
The four Masters LV operate in combined mode. All relevant data is sent via NMEA-2000 protocol over the CAN-Bus. The NMEA2000 protocol is a derivative of the industrial J1939 protocol. The SmartLink MX collects this CAN-Bus data with all battery essential parameters. The advantage of this setup is that the end user reads a centralized (combined) state-of-charge. In addition, the backup generator and other systems such as air conditioning can be controlled from the SmartLink MX using the programmable contacts. In this combined mode a parallel redundant system is created. This improves the reliability and uptime of the BESS (Battery Energy Storage System).
20 ft. Container
The energy system was fully integrated and pre-installed in an insulated and air-conditioned 20 ft. container reefer. This assures the required temperature levels end prevents interference with (salt) water, dust and insects from outside. A diesel genset has been integrated for emergency back-up. All together this resulted into a highly redundant system for maximum reliability and availability; independent energy on another level!
- System integrator and installer: Off-Grid Factory
- Client: Belnem House Bonaire
- Installation: February 2023
- Location: Belnem Bonaire
- Solar: 130kWp
- Solar inverters: 2 x 50kW SMA Core1
- Solar chargers: 3 x Victron 450/200A MPPT RS
- Inverter/charger: 9 x Victron Quattro 15kVA
- BESS (Battery Energy Storage System): MG 430kWh 60 x LFP280 & 4 x MasterLV1000PC+
- Genset: SDMO-Kohler 130kVA
View the Single Line Diagram here