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 Topic: Leisure Battery Installation
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08/10/2022 at 5:46pm
Location: London
Outfit: Lunar Cosmos 524
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Depending on size and type of battery AND type of inverter, that sounds like it could be a reasonably quote.
Ideally you want a 'pure sine wave' inverter if you are intending to power any kind of electronics from it, which are more expensive than 'modified sine wave' types. Modified sine wave inverters are OK for things like kettles and heaters, but can be incompatible with some electronic devices, that includes humble things like phone chargers, not just high end stuff like TV's, because the output is only approximating the sine wave form of normal mains supply.
If a lead acid battery, in whatever guise, remember that it can only be discharged to about half it's rated capacity before it will be damaged, so say a 100Ah battery only effectively has 50Ah usable capacity! With a 2000W inverter, ideally you'd want the biggest capacity battery you could fit! I know you are taking a quantum leap in costs, but a Lithium battery is more suited to a high powered inverter.
It gets difficult to explain the technical background and reasoning to a layperson without giving them a crash course in electronics and electrical engineering - believe me, it's dull stuff best avoided!
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09/10/2022 at 10:43am
Location: East Herts
Outfit: 1992 Elddis Wisp 450CT + X Trail
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If the vehicle wasn't built with a leisure battery installed then everything is running off the vehicle battery. First thing to do will be to separate the "vehicle" circuits from the "domestic" circuits so that things like the interior lights, 12 volt power points, water pumps etc all run off a separate circuit to all the road lights, horn, wipers, etc. This "domestic" circuit can then be connected to the new leisure battery. That is the bit which may take some time, depending on how complex the wiring is. Once you have two separate circuits (one vehicle and one domestic) then you can set about sorting out the charging circuits. If you already have a mains-powered battery charger it will obviously be charging the vehicle (currently only) battery, so a switching circuit will need to be installed so that you can charge either battery from the EHU, unless of course you just want it to charge the leisure battery.
It's not that complicated a job, but it will be time consuming hence the £700 quote. If that is all in it doesn't actually seem that bad considering today's labour charges.
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Best Regards,
Colin
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via mobile 08/10/2022 at 1:28pm
