Technical What would drain 4.1 kW of leisure batteries in 8 weeks?
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Technical What would drain 4.1 kW of leisure batteries in 8 weeks?
Anything left on.
Fridge display?
Control System?
Alarm?
My control and monitor system consumes 5w so if no solar it takes a couple of weeks to flatten the battery.
Having said that with LifePo4 battery's the BMS should have shut them down before they reached 0%
Fridge display?
Control System?
Alarm?
My control and monitor system consumes 5w so if no solar it takes a couple of weeks to flatten the battery.
Having said that with LifePo4 battery's the BMS should have shut them down before they reached 0%
Communicator
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I assume you mean KWh? Then the answer could be a 3W bulb.
If you have a smart shunt, and or a display (Victron or Renogy) these draw power all the time.
For the shunt, disconnect the red wire
For the display unplug it
For the shunt, disconnect the red wire
For the display unplug it
You really should totally isolate any battery if it is in long term storage. Even then they will self discharge. Lithium also have electronics inside continually drawing small amounts of energy. Best way to store lithium is totally disconnected at between 50% to 75% charge status, and to check status every couple of months
Much obliged as always.
The Truma controller is always blinking as is the Victron unit for the PV which would account for it.
Fridge etc was off.
edit: also remembered that TV is on standby.
In passing, I have an inverter which is hard wired to the leisure batteries, while I have it switched off, is it still drawing some power?
What would you consider long term storage? 6 weeks is the longest it has been in doors since I got it.
The Truma controller is always blinking as is the Victron unit for the PV which would account for it.
Fridge etc was off.
edit: also remembered that TV is on standby.
In passing, I have an inverter which is hard wired to the leisure batteries, while I have it switched off, is it still drawing some power?
What would you consider long term storage? 6 weeks is the longest it has been in doors since I got it.
Last edited:
The inverter may well draw power even if off, mine does. However I have an isolation switch on its supply which is only on when I'm using the inverter.
Thanks, so what it the switch rated at?. Mine is a 2.5kW so draws up to 100 Amps at times
Something like this
There are better makes available that's just the first one I found.
Don't use one with a removable key, they are rubbish.
There are better makes available that's just the first one I found.
Don't use one with a removable key, they are rubbish.
Thanks, do you crimp your own DC cables?
Yes, but I do have the proper tooling as it used to be my work one
lycopersicum
Member
Typically, you'd have one of these big switches before anything else on the positive side of the leisure battery. You'd turn it off every time you're leaving it under a roof for more than a couple days.
Note that if your Victron solar controller is in automatic voltage mode it is recommended to reconnect the battery before the PV, because the unit will want to guess the battery type (12 or 24 V) in the first few seconds after powering up.
Also avoid abruptly disconnecting the battery while the PV is charging it, especially so at high currents (possible voltage spike). Best to switch off the charging first. If you don't have an isolation switch for the PV, that's a bit trickier.
Note that if your Victron solar controller is in automatic voltage mode it is recommended to reconnect the battery before the PV, because the unit will want to guess the battery type (12 or 24 V) in the first few seconds after powering up.
Also avoid abruptly disconnecting the battery while the PV is charging it, especially so at high currents (possible voltage spike). Best to switch off the charging first. If you don't have an isolation switch for the PV, that's a bit trickier.
lycopersicum
Member
Typically a solar-specific DC breaker, two poles, amp rating according to your solar system. Eg mine is a Geti GF-J02, 2P 500V 25A. It interrupts both the positive and negative solar wires. Careful with these wires if you have a large system, I have 3 panels in series so max voltage could be up to a dangerous 70V.
But, I was looking at the Victron app so if you have the Bluetooth model you can do it all in there:
- to disconnect the battery, first turn off "charger enabled" in the settings.
- when reconnecting, if you're in the sun and the Victron is already on from the solar power, then just go to the settings page and make sure that "battery voltage" is correct then connect the battery and enable the charger.
But, I was looking at the Victron app so if you have the Bluetooth model you can do it all in there:
- to disconnect the battery, first turn off "charger enabled" in the settings.
- when reconnecting, if you're in the sun and the Victron is already on from the solar power, then just go to the settings page and make sure that "battery voltage" is correct then connect the battery and enable the charger.
