Probably could after some wiring, yes.

Might be able to run cables underneath and have hood shut.

Could remove battery, too.

 

Thanks for the quick response. I may be wrong, but it's my impression that removing the battery on a hybrid would on our return necessitate the resetting a number of systems that need constant, if minimal, power.

 

Possibly, yes.

Probably my last option.

Not 100% familiar with a newer Hybrid, for sure.

 

The wire from the battery maintainer to the battery clamps is small enough that it won't damage the rubber seal under the hood. Or find a way to route the wire so it doesn't contact the rubber seal. I don't think any of the car's interior power fittings are connected to the battery when the car is off, but plug something into one, shut the engine off, and see if it is live.

In these Hondas disconnecting the battery causes several error messages to show which correct themselves with time and some driving in my experience.

The modern electronic battery maintainers are generically called "battery tenders" much like we call any facial tissue Kleenex. Battery Tender® brand is good, as well as others such as NOCO and Battery Minder. These will not overcharge the battery; they stop and start themselves as needed. A battery maintainer in the 1 amp range will work for your use as well as one with a higher rating. The smaller battery maintainers will fit in a spot under the hood, and you run the extension cord to them; the plug is now in a protected place under the hood.

 

Maintaining through the 12v accessory outlet will not work. Honda has always been key off, accessory sockets are cut from power.

 

Thanks. I am thinking of jumping the relay that turns off the power to the front accessory socket so that it is always on.

 

I don't know about your 24, but on my 25 I could drop and extension cord down through an opening on the left side of the engine compartment. I could then pull the cord through the hole, only leaving as much of the extension cord in the engine area as needed to reach the battery tender. the tender could then be left in the engine compartment with the hood shut. Look for a similar opening in your 24 and you could do the same. Depending on your tender you could also maybe just drop the plug from your tender through the hole and still have enough power cord and charging cables to reach your battery without running an extension cord out of engine compartment.

 

I have a Noco D2 maintainer mounted next to the horn, eyelets on the battery terminals, and ran the plug through the grill. I have the CR-V in the garage, so not an issue to run an extension to the plug in the grill.

The only caveat is the hybrid battery sitting for 10 weeks. I am 75, sometimes the CR-V will sit in the garage for 3-4 weeks as we also have a 2007 Sienna that we use for grocery runs to the city about an hour away.

I also had a 2008 Prius that sat all winter, backed it out of the garage after 2 months and force charged the hybrid battery, which you can do on nimh battery Prius. Still haven't run across anyone being able to do that on a CR-V hybrid to top up the hybrid battery.
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pretty easy. Car in the ready state. In park. Depress the accelerator and hold it there. The ICE will fire up and charge the high voltage battery to “full” which I’m sure is probably around 80% even when the battery gauge reads full.

 

Good info. I didn't know this. Thanks, all.

 

If you are also a bit worried about the Noco being plugged in all the time during that 10-week span, consider plugging it to a programmable timer outlet. I used that in the past for plugging engine block heaters and it worked wonders as it would only turn on less than half the time!

 

At least with my 2023 Sport Touring, with the CR-V in park and turned on, if you hold the accelerator to the floor for 10 seconds, the engine will start/run and charge the battery for as long as you hold the accelerator to the floor, or until the HV battery is full at which time the engine will turn off.

pretty easy. Car in the ready state. In park. Depress the accelerator and hold it there. The ICE will fire up and charge the high voltage battery to “full” which I’m sure is probably around 80% even when the battery gauge reads full.

Interesting, will try that. With the Prius, foot on the brake and mash the accelerator half ways until battery gauge showed full. Anyways, doing that will allow the CR-V to sit unattended for a couple months. What is the suggested interval for the hybrid battery to discharge unattended to say 20%.

 

I do the Noco Genius 1 and got the optional GC002 eyelet adapter and the extension cable which allows for what you’d like to do. The stock Genius 1 comes with a cable with alligator clamps which can be removed thus remaining M6 eyelet hooks. I like having both options so I purchased the optional M6 eyelet cable. I purchased the extension cable so I can keep the the car parked outside while it’s hooked up to the power adapter. This cable can easily come from underneath the vehicle so you can leave the hood closed. I also purchased one of those volt/watt digital meters which plugs into the outlet and then the Noco is plugged into this meter so I can see visually when the battery is no longer being charged but this is totally optional. Works great!

 

That sounds like a great option. I'm smacking myself in the head (Doh!) because I never considered dropping the cord out the bottom. Thanks!

 

Trying to keep the 12v battery charged by plugging into one of the internal 12v sockets sounds like trying to make perpetual energy possible. The outlet is drawing power from the battery which is then attempting to charge the source of its own power. Am I looking at something incorrectly?

 

Accessory outlets are passive unless something is plugged in. I'm unfamiliar with the CR-V's wiring, but in older cars with simple 12v systems, the accessory (cigarette lighter) outlet/socket could easily be rewired so that it was always "on," i.e. you could use it without the car's key. In that case, the 12v battery--a simple DC circuit--could be charged back through the outlet exactly as if a charger were connected directly to the battery terminals. Newer cars wiring systems are more complicated, but I suspect that the CR-V's accessory outlet would work the same way. Likely, all you would have to do was jumper a relay, but it looks like it would be a chore to get to the wiring harness.

 

Use a decent tender and use crimped eyelets to mount it on the battery terminals. I have never done this on a Honda car/suv, but anyone who has a motorcycle knows how this works. I have an Aprilia MC and run a tender all winter. The Apes are known for electrical "issues" and expensive batteries. Come spring, it fires right up. The other options are too complicated and require re-wiring.

 

Thanks. I have a Goldwing with a permanent pigtail that hooks to a tender. I'm trying to avoid leaving a tell-tale electric cord running up my driveway from the nearest outlet. A solar charger minimizes that. A solar charger that I could mount under the sunroof and from which I could then run its cord to a power outlet would eliminate external cords entirely. I wouldn't mind some hassle, depending on exactly what was involved in getting to the accessory-outlet wiring.

 

I have used the OBD port adapters when I had to install new batteries. There are companies that also make solar trickle chargers that plug into the OBD port. You would probably want one that provides 20 watts or more.

 

Solar charger from Battery Tender? 17watt. $130

Solar Battery Chargers

Battery Tender® solar panels and controllers allow you to charge and maintain batteries with the sun.

www.batterytender.com

And a OBDii connector. $27

Quick Disconnect OBDII 12V Adapter Cable

The OBDII connector is a standard connection point to the battery on all new vehicles that will allow you to set the 5 watt panel on your dash and charge / maintain your vehicle battery from inside the vehicle.CONVENIENT CHARGING22 inch cable connects to your vehicle’s battery through the OBDII...

www.batterytender.com

 

Brilliant. Exactly what I need. Here's an alternate place to order it. Is there anything in the car I need to configure, or do I just plug the connector into the OBD port?

 

Not sure if you have a Harbor Freight close by.

https://www.harborfreight.com/25-watt-solar-panel-63940.html?_br_psugg_q=solar+panel

 

I do. Thanks.

 

So here's what I've come up with (pics below):
My 2024 Hybrid has a sunroof. I bought a 20W solar charger/maintainer that fits beneath the sun-roof glass and its interior sliding panel. The wire reaches across the steering wheel and out the front edge of the driver's door, then slips beneath a panel for 4", then out and under the trailing edge of the hood and from there to the battery. If you don't have a sunroof, you can leave the solar panel on the hood, but I wanted the fewest external tell-tales as possible.

(The panel closes fully.)

The door closes without crimping the wire.

The hood closes fully.