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¡°Really Intelligent ¡° charging system
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hi all,
looking for some advice and thoughts please - I have a number of ways of charging the battery bank, solar panel, the engine alternator and shore power.? Sailing along yesterday in the uk and it dawned on me that it would be really usefull if the charging system that i have would sense when the batteries are full and rather than reduce the charging ampage and ¡°dumping¡± the excess, this could be used to, for example, heat the hot water or .... clearly, i can do this manually, and maybe that is the answer - automation is not worth doing - but does anyone know how this could be done? thank you for youe thoughts. Marc ¡±Linocat¡± 380s2 cruising uk west coast currently. |
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¿ªÔÆÌåÓýI wrote an Arduino software controller a few years back that measured battery voltage and fridge/freezer temp. When voltage was over 13.5 (adjustable to your float condition), it would turn on the fridge and/or freezer until they reached their ¡°max cold¡± temp (38F for fridge, 10F for freezer, again configurable). Below 13.5V, it would default to the ¡°regular cold¡± temps, 44F and 28F. It would be trivial to adapt it to a water heater as well.? I no longer have that laptop with the code on it... and I¡¯m not a coder, so I¡¯m sure it was ugly... but someone qualified could code it up quickly.? Tim On Jul 17, 2018, at 1:30 AM, Marc <marc.giraudon@...> wrote:
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We have smart MPPT solar charge controllers by Victron Energy, and they have a load output that can be used for dumping excess energy (configurable, for example turn on if voltage >13,5V and off if it drops below 13V).?
Our battery monitor BMV700 by Victron Energy also has a configurable output that can do the same thing, but also taking battery SOC into account (like turn on relay whenever state of charge >98%). We converted the external igloo ice box under the cockpit settee into a huge fridge strictly for drinks (OK, and water melons). The fridge runs only on excess energy:cool drinks in the morning and ice cold drinks from noon to late in the evening, all without any draw from the battery. Rainer |
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¿ªÔÆÌåÓýI can concur this works great. I posted pics of my setup a month or so ago here and to cruisersforum.com forum after Rainer had told me of his setup. So following his advice, I have??electric?fridge under the 380 seat instead of an ice cooler. This is an almost exact fit compared to the cooler that came with the boat.
However, I did not know the load output is coming direct from solar panels? I had thought the algorithm turns on a relay, which allows current from the battery to flow through the load terminals.
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