Inverter to charge 540ixp

[Sutton]

On 08/09/2022 at 20:38, Dan Maynard said:

It will be interesting to hear how you get on, we had a thread about this recently.

IIRC in the other thread, a leisure battery was optioned when charging on site but the OP "reverted" to buying more batteries and getting them charged overnight prior. Batteries for the 540i are £230+.

 

I'm assuming @Acer Forestry is felling not just delimbing or blip-snedding - so before looking at watt requirement, battery AH, (stop-start batteries are not as robust as full on crankers in my experience), Vehicle Engine Mgnt etc, I believe an upgraded alternator is necessary but we need more imputs.

 

And I'm assuming manufacturer's lecky spec are optomistic so 300w inverter maybe too ambitious given the DC->AC->DC inefficencies (i.e. lost wattage)

[lurch_917]

On 11/09/2022 at 19:02, Sutton said:

 

And I'm assuming manufacturer's lecky spec are optomistic so 300w inverter maybe too ambitious given the DC->AC->DC inefficencies (i.e. lost wattage)

i wouldnt say that as i have a 300w inverter that i run my small arc welder off of when the crap hits the fan and i break a stearing knuckle off roading . it just needs the engine running on tick over to keep up and thats on 225 rods .

[doobin]

12 hours ago, lurch_917 said:

i wouldnt say that as i have a 300w inverter that i run my small arc welder off of when the crap hits the fan and i break a stearing knuckle off roading . it just needs the engine running on tick over to keep up and thats on 225 rods .

Surely you mean 3000w?

[Sutton]

15 hours ago, lurch_917 said:

i wouldnt say that as i have a 300w inverter that i run my small arc welder off of when the crap hits the fan and i break a stearing knuckle off roading . it just needs the engine running on tick over to keep up and thats on 225 rods .

You're braver than I if you weld a running vehicle. I was taught to disconnect battery before welding - unless of course you have a mate following when offroading - then you could use his to fix yours?

 

2.5mm rods need 100amps. The husqvarna battery chargers need 300-500amps.

 

So help us out on the OPs question. What inverter do you use? You don't use it straight off the cigarette lighter socket do you?

[doobin]

20 minutes ago, Sutton said:

You're braver than I if you weld a running vehicle. I was taught to disconnect battery before welding - unless of course you have a mate following when offroading - then you could use his to fix yours?

 

2.5mm rods need 100amps. The husqvarna battery chargers need 300-500amps.

 

So help us out on the OPs question. What inverter do you use? You don't use it straight off the cigarette lighter socket do you?

100 welding amps is different to 100 amps at 240v. 
 

And you can’t mean 300-500amps for the charger, you must mean 3-5 amps? 

[Bolt]

22 minutes ago, doobin said:

100 welding amps is different to 100 amps at 240v. 
 

And you can’t mean 300-500amps for the charger, you must mean 3-5 amps? 

…. or possibly he means 300-500 Watts!

[Sutton]

2 hours ago, doobin said:

100 welding amps is different to 100 amps at 240v. 
 

And you can’t mean 300-500amps for the charger, you must mean 3-5 amps? 

Indeed! 😂

So, 300w/240v =1.25amp required for the husky charger.

So, as you've kindly thrown your hat in, what do reckon? Is there any merit in charging chainsaw batteries from a stationary vehicle on site?

[doobin]

1 hour ago, Sutton said:

Indeed! 😂

So, 300w/240v =1.25amp required for the husky charger.

So, as you've kindly thrown your hat in, what do reckon? Is there any merit in charging chainsaw batteries from a stationary vehicle on site?

Sounds like an expensive way to charge batteries to me. That’s why i run petrol saws. 

[GarethM]

Without sitting on the fence, it's probably cheaper just to buy a few more batteries for home charging, unless you're also wiring in a couple of leisure batteries for the longer journeys.

 

You can always charge one on the way to site, but you're then also carrying a petrol backup as well. I'm sure the statistic was about 15-20 minutes just to restore the power needed to start your engine, no free lunch as they say .

[lurch_917]

On 22/09/2022 at 08:56, Sutton said:

You're braver than I if you weld a running vehicle. I was taught to disconnect battery before welding - unless of course you have a mate following when offroading - then you could use his to fix yours?

 

2.5mm rods need 100amps. The husqvarna battery chargers need 300-500amps.

 

So help us out on the OPs question. What inverter do you use? You don't use it straight off the cigarette lighter socket do you?