Laying Up Honda e for several weeks

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HeartNotHead
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Joined: Tue Oct 06, 2020 11:39 am

Laying Up Honda e for several weeks

Post by HeartNotHead » Mon Jun 07, 2021 2:59 pm

I cannot find any guidance in the manual for laying up a car for several weeks. My main concern is the 12v battery. I intend leaving the car with a 90% charge on the main battery and with the correct tyre pressures checked. P16 of the manual (thank you @keithr for this guidance on an earlier post) suggests the 12v battery charge is automatically (after three days) maintained by the main traction battery even when the Power if off and the vehicle left locked - but does not elaborate. My Honda dealer did not know the answer. Does anyone have a definitive answer? And is there anything else I should be considering in laying up the car. Thank you.

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londiniumperson
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Re: Laying Up Honda e for several weeks

Post by londiniumperson » Mon Jun 07, 2021 3:42 pm

You could disconnect the 12v battery, though I probably wouldn't in case all the infotainment settings were defaulted when you came to reconnect it. If you're not able to drive it for a prolonged period I'm not sure what else you can do.
I'm not sure that the 12v is charged every 3 days.
Here's a graph of my 12v battery from 4 June, approx 1am when a charge had completed and the car was left unused until just after 8am this morning (7 June) with the 7kW home charger cable connected all that time but no additional charge occurred (I've removed my dashcam for over a week to check that it's not the reason for the voltage drop).

IMG_20210607_162834.jpg

UK Advance in Crystal Black Pearl on 17's
1st Registered Aug 2020
Home charger: Ohme
Electric tariff: Octopus Go Faster 2030 (4 hr) as of 22/01/2021, previously on Octopus Agile tariff
PM me for an Octopus referral code (£50 for you & £50 for me).

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Reuben80
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Re: Laying Up Honda e for several weeks

Post by Reuben80 » Mon Jun 07, 2021 10:01 pm

You should add more pressure to the tyres to avoid flat spots. Around 42psi should be fine for the 17inch. From the factory they came with 48psi to avoid flat spots while shipping. I think 70% charge is better than 90% for longevity but if you ever noticed any drop in percentage when not used for a few days then is better to keep it at high SOC.

HondaR84
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Joined: Wed Jan 27, 2021 8:53 pm

Re: Laying Up Honda e for several weeks

Post by HondaR84 » Tue Jun 08, 2021 7:24 am

Is it being left somewhere it can be plugged in or not like an airport carpark? if so like with any other car wouldn't you leave the battery on a 12v smart charger that would put the battery into storage mode and and keep it there until you disconnect it?

We are authorised Victron dealers at work and use the product in the link below to look after our boat batteries, I've got one at home that I've used on all my cars when they weren't being used and was a god send last year when they didn't move for a few months. They also have a recondition function to revive batteries that have gone totally flat and its bluetooth so you can check what is doing from in side your home without having to go out to the car to check.

https://www.batterymegastore.co.uk/prod ... 20433024r/

I'd highly recommend one for any garage and if anyone does want one we have a few in stock and will do 20% off that price for forum members.

HeartNotHead
Posts: 8
Joined: Tue Oct 06, 2020 11:39 am

Re: Laying Up Honda e for several weeks

Post by HeartNotHead » Tue Jun 08, 2021 10:17 pm

Many thanks for these really helpful replies.

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