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Main House Electricity System (view source)
Revision as of 15:01, 26 August 2020
, 15:01, 26 August 2020no edit summary
[[File:12-FS-210 Rolls Battery.JPG|thumb|Deep -cycle battery 12 FS 210 by Rolls Battery]]The main house has a 24 Volt [V] deep-cycle battery system in with a capacity of 420 Ampere-hours [Ah]. The battery system consists of four deep cycle batteries of the main housetype 12 FS 210 by Rolls Battery ([data sheet](https://rollsbattery.com/wp-content/uploads/batteries/12FS210.pdf)). Each individual battery has an output voltage of 12 V and a capacity of 210 Ah at a discharging rate of 20 hours (please check datasheets for lower discharging rates). The four batteries are parallel- and series-connected, which doubles the system’s voltage and capacity.
As with all deep cycle batteries, they shouldn’t be drained to less than 20% of their capacity, which results in a usable capacity of 336 Ah with 24 V (~8,000 Watt-hours [Wh]) after purchase. If the hour rate (time to discharge the battery) is closer to 10 hours, the usable capacity fluctuates around 296 Ah with 24 V (~7,100 Wh). Please note that these numbers will be lower after long-term usage.
## Plans for upgrading the system
One should refrain from adding new batteries to an already used set as it wears down the old batteries faster. This will result in deep discharged old batteries. Therefore, we could consider moving the current/old set to our future octagonal cabins. As depicted in the illustration above, we could run two independent 12 V systems in different locations. Rolls Battery released a new version of our current batteries, the S12 185 ([data sheet](https://www.rollsbattery.com/battery/s12-185/?pdf=8512)). Here is a [summary of the model updates](https://rollsbattery.com/wp-content/uploads/2019/05/Model-Updates.pdf).