sylm_2000

I swear by the ultimate bp - miles extra on my RX450H. I wouldn't change it for the world. My house is net zero using renewable electricity for years, with solar panels on the roof, V2G with my Nissan Leaf, EV driver for over 6+ years, Hybrid for 13+ years and recently replaced gas boiler to air source heat pump + offsetting. One child. It is still not making any difference at all - damm!

I bought both from Amazon - this is the link for the trickle charger https://www.amazon.co.uk/gp/product/B07ZNL3MC4/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1 and the battery jump starter was from Yaber (newer model to what I purchased) - https://www.amazon.co.uk/YABER-Starter-20000mAh-Portable-Flashlights/dp/B08V5JX44J/ref=sr_1_5?dchild=1&keywords=battery+booster+jump+starter+yaber&qid=1611856451&s=automotive&sr=1-5 I also tried 10W Solar Charger connected via the ODB port, not very helpful as the discharge rate exceeds the charge rate of the solar panel. Hope this helps.

So I have invested in AA solar battery, followed by 10W Solar Battery Charger and then an expensive jump starter battery and a trickle charger during lockdown. My view is that solar panel chargers less than 20w (combined with decent sun availability) are pretty much useless and will not be able to sustain average 2w of discharge each day by RX450. I found the jump starter battery packs the most helpful. A small amount of charge is required for a flat battery. A decent choice on Amazon, I can recommend if you're interested. Lastly the most trusted solution remains keeping a trickle charger connected to the battery as that would ensure health and safe charge level for the AGM battery. See if you can buy a charger which has setting for AGM battery (most don't). I was advised by the AA man to replace battery, visited the Lexus dealership for a replacement and was advised against it. It was only a flat battery and hence maintaining charge was recommended given the limited use of car these days. Any new battery would end in the same situation if the charge is not maintained.

So a quick update. After six weeks (no drive), I measured the battery with a multimeter and it was 11.46 so I was rightly furious as it was clear that the solar PV has not worked at all. However the car started without any hesitation, the boot door (powered) opened seamlessly and managed to have sufficient charge after 6 weeks. I had two hours of drive and connected the solar panel via ODB back to the car. It is 2.4w charger and whilst I can't see battery improvements, it is doing the job. My RX450H is 2015 reg (from new) so might be the battery needs replacement anyway. For the upcoming season with less sun I am wondering if the solar charger will keep the battery alive. It does work very well for my bike which I have tested for two winters so there's hope as science has proved otherwise.

I use a solar trickle charger for my (yamaha) bike and it has worked reasonably well so I thought the same should okay for the car battery. I should have looked into the amperage a bit more consideration. I relied on the advert and less on my electronics engineering degree 😞

Agree and yes I learnt that the hard way! I checked using the multi meter and today it was 11.46v - not pleased with the charger and performance.

thank you - this is great! I will check and update the post as I have my Lexus on the driveway with Solar ODB connected for over 5 weeks. Hope it starts 🙂

And BTW - £21.99 free delivery https://bars4cars.co.uk/collections/chargers/products/aa-essentials-12v-solar-powered-car-battery-charger-solar-panel-obd-version

Thanks bought one this week and using it with my RX450H 2015 reg. I hope this would keep the battery cozy during the lockdown and limited use period. I have a similar (Oxford) solar panel for my bike to keep it topped up during the winter months as I am a fair weather rider. I am using the OBD port so has anyone managed to check if the battery is actually getting charged? I am looking for evidence :)

Sorry to hear ! Brazen theft .... By any chance you had a set of keys next to the front door and you assume your keys were cloned by the thief? Following advice from this forum I have now developed a habit of keeping keys in a secure wallet when at home.

Finally caved in to the earlier decision and stayed with Perilli all season. Got the tracking, wheel balancing and alignment sorted when at the garage. What a difference it makes! Car is just over an year old but difference in driving is immediately noticeable. Got a trouble of getting rid of four Dunlop almost new but very happy with the choice of tyres. Weather testing in Europe for Christmas !

Search for below in Amazon, 3 packs for £10 Mengshen® Cell Phone RF Signal Blocker Jammer Pouch Shielding Bag Case Double Layer MS-PX01 Does the job, one for spare set of keys at home.

Absolutely correct. I have bought pack of three cases from amazon and they are perfect to prevent RFID signal leakage even when standing next to the door. That's my peace of mind. Have a secure driveway, will think about getting a steering wheel lock. You can only create deterance not prevent 100%

Likewise keep us posted, planning to get replacement next week on RX450 for Perilli Scorpion Verde All Season. Didn't check Michelin as they are close in £ range.

Shocked at the news that RX450 can be so easily cheated with a simple hack! Can we get the discussion back on how best to avoid this hack? Will keeping keys in tin foils help? Can the keyless access blocked allowing only manual key entry in case you're traveling in high risk area? Any response from Lexus or dealership?