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turbotim asked

Negative -48 volt systems. Can we use a BMV-700 for genset controls?

We are looking to use the BMV-700 to control our generator at our telecommunications sites. Our sites are -48. Positive is return. Not sure if this can work but wanted to confirm with you guys. We are running sites off grid and need to turn on genset with a SOC control. Using Large 100Ah Lithium Cadenza battery unit. Cannot use Voltage control with the lithium so looking for a good SOC control. We use SMA units for other systems with genset and SOC built into the Inverter. Looking for a stand alone small genset controller that uses SOC. Thanks

BMV Battery Monitorgenerator auto start
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Alexandra answered ·

@turbotim

You can use the relay on the BMV 700 (it is programmable) to signal something based on SOC to get the generator to start.

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turbotim answered ·

Thanks for the reply. All the genset needs is a NO signal and looks like the BMV-700 has one relay output that can be tied to SOC. From the manual - 7.3. Relay settings The battery monitor is equipped with a programmable relay. These settings are used to program the function of the relay. The relay settings are disabled by default (except the State of Charge (SoC) relay setting). To enable, a relay setting do the following..
The commercial gensets we use are a two wire start setup.

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Alexandra avatar image Alexandra ♦ commented ·
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