Battery charger on a 911 question

[911virgin]

a 911 993 and 911 997 , each on its own continuous battery charger, how often should the car engine be started ?

 

how long can you keep the BC on without ill effects on the car?

 

and how often would you advise each car be actually driven vs turning the engine on?

[Mike737]

Depends on the type of charger you have. You really need a charger which has pulse cycle which allows the battery to deplete a little before it starts charging it again so it isn't constantly being charged. Most trickle chargers will have this sort of cycle.

You can always store your car for a long period of time without ever starting it if you have the right sort of pre-storage maintenance program which can effectively mean draining all your fluids and adding sacrificial storage fluids. Otherwise just do a winterization program which is listed only plenty of Porsche sites if you don't plan to drive it for 6 months. The best thing you can do when storing the car for a number of months is to actually change fluid contrary to popular belief as well as clean out those radiators which means when it comes to starting it later down the track the oil will lubricate the engine quicker and it wont have to deal with deposits which are now glued into place.

Here's some winterization lists
https://www.porschedelaware.com/blog/how-to-store-a-porsche-for-winter/
https://www.butzisquared.com/2016/11/tuck-porsche-winter/
https://rennlist.com/how-tos/a/porsche-997-storing-your-porsche-for-winter-376109
https://flatsixes.com/advise/maintenance-tips/10-steps-winterize-your-porsche/

When you're bringing it out of storage treat it as if you're doing a roadworthy on the car. Check lights are working, fluids are topped up, tyres are up to pressure, any leaks, etc.

Porsche and most workshops generally advise not to just turn the engine on, but to actually take it for a drive as you need to actually warm up and lubricate things properly such as your transmission, diff and shocks. Just warming the engine will generally do more harm than good on most cars as you'll build up condensation and end up causing rust to form within parts of the engine and exhaust system.

What is it that you're actually trying to achieve here? There's plenty of people on this forum who only start their cars up once to every couple of months without much dilemma. 

[911virgin]

On 02/06/2021 at 20:51, Mike737 said:

Depends on the type of charger you have. You really need a charger which has pulse cycle which allows the battery to deplete a little before it starts charging it again so it isn't constantly being charged. Most trickle chargers will have this sort of cycle.

You can always store your car for a long period of time without ever starting it if you have the right sort of pre-storage maintenance program which can effectively mean draining all your fluids and adding sacrificial storage fluids. Otherwise just do a winterization program which is listed only plenty of Porsche sites if you don't plan to drive it for 6 months. The best thing you can do when storing the car for a number of months is to actually change fluid contrary to popular belief as well as clean out those radiators which means when it comes to starting it later down the track the oil will lubricate the engine quicker and it wont have to deal with deposits which are now glued into place.

Here's some winterization lists
https://www.porschedelaware.com/blog/how-to-store-a-porsche-for-winter/
https://www.butzisquared.com/2016/11/tuck-porsche-winter/
https://rennlist.com/how-tos/a/porsche-997-storing-your-porsche-for-winter-376109
https://flatsixes.com/advise/maintenance-tips/10-steps-winterize-your-porsche/

When you're bringing it out of storage treat it as if you're doing a roadworthy on the car. Check lights are working, fluids are topped up, tyres are up to pressure, any leaks, etc.

Porsche and most workshops generally advise not to just turn the engine on, but to actually take it for a drive as you need to actually warm up and lubricate things properly such as your transmission, diff and shocks. Just warming the engine will generally do more harm than good on most cars as you'll build up condensation and end up causing rust to form within parts of the engine and exhaust system.

What is it that you're actually trying to achieve here? There's plenty of people on this forum who only start their cars up once to every couple of months without much dilemma. 

hi mike 737, thanks for all the very useful info

i will try to drive each car the 997 weekly, the 993 every 3-4 weeks

 

just didnt want the battery going flat on either car