Charging ebikes (1 Viewer)

[tankerpaul50]

Hi hope there is someone out there that can give me some advice,iam looking of a way to charge our ebikes the batteries areHL-10L 36v8aAh/288wh Li-ion The Battery charger is Entree Ac100v-240v-1.8A max 47-63Hz. Sortie42.0v. 2.0A on our MH we have 1x 100w solar panel(thinking of adding another 100w panel)2x100Ah leisure batts Q what would be the best size inverter to fit.I look forward to your replys

 

[DanielFord]

How long does it take to charge the bikes from empty to full?

 

[Robert Clark]

We find that our two E bikes draw a lot of power when charging.
Would suggest charging them when moving if possible.

^{_{Subscribers  do not see these advertisements}}

 

[hilldweller]

Entree Ac100v-240v-1.8A max 47-63Hz. Sortie42.0v. 2.0A

240v 1.8A = 432W
42v 2A = 80W

A 300W inverter should do it. 500W to be really sure.

 

[DanielFord]

240v 1.8A = 432W
42v 2A = 80W

A 300W inverter should do it. 500W to be really sure.

But 400w @12v is 33A, that's a big ask for the leisures, depends how big the bank is really.

 

[irnbru]

I have a 300w inverter and it only just manages to charge our 36v batteries so long as they arent flat.

^{_{Subscribers  do not see these advertisements}}

 

[DanielFord]

I have a 300w inverter and it only just manages to charge our 36v batteries so long as they arent flat.

A 300w inverter will draw the same amount of power as a 2kw one, the only difference is the peak output. The big question is, can the battery bank deal with that current draw long enough to recharge the batteries

 

[irnbru]

Well I'm no expert on any of this but I do know that since we have been away the charger is charging the bike batteries so it works although Alan has connected the inverter straight to the battery as it was blowing a fuse through the system.

 

[Robert Clark]

Our two bikes pull 20 amps when charging
They take about 4 hours to charge, so we can only charge them when our leisure batteries are already full and the sun is out

^{_{Subscribers  do not see these advertisements}}

 

[hilldweller]

But 400w @12v is 33A,

It's only a startup surge. The inverter has to handle it but it's really no load on the battery.

 

[funflair]

It's only a startup surge. The inverter has to handle it but it's really no load on the battery.

Especially if you have enough solar panels as over half the demand would come straight from the panels.

Martin

 

[hilldweller]

Especially if you have enough solar panels as over half the demand would come straight from the panels.

Martin

Apart from the unfortunate problem that usually we don't ride at night so you need two sets of e-bike batteries to be sure of pulling off daytime charging.

^{_{Subscribers  do not see these advertisements}}

 

[The Nomad]

A 300w inverter will draw the same amount of power as a 2kw one, the only difference is the peak output. The big question is, can the battery bank deal with that current draw long enough to recharge the batteries

I had thought that due to conversion losses, a big capacity inverter (say 2,000 watts) actually drew more per input power from the leisure batteries than a smaller (say 200 watts) one, for the same amount of output............ie if you happened to have both types on board it was more efficient to use the lower capacity inverter for low wattage/trickle charging mains operated items/operations.

Is that not the case?

 

[DanielFord]

I had thought that due to conversion losses, a big capacity inverter (say 2,000 watts) actually drew more per input power from the leisure batteries than a smaller (say 200 watts) one, for the same amount of output............ie if you happened to have both types on board it was more efficient to use the lower capacity inverter for low wattage/trickle charging mains operated items/operations.

Is that not the case?

I believe it is true, but the differences are fairly small. We have a 1800kw inverter, when we switch it on, it seems to draw about 1.8 amps, it is only powering the microwave in standby at that point. The things we use it for don't put it under huge load, well not until morning when we need coffee!

My brother in law has a small inverter in his work van, and he only uses it to recharge phones and stuff, it has already murdered the battery.

 

[hilldweller]

Is that not the case?

You really need to read the specs of the various inverters to answer that, that's if you can trust them. They normally show an efficiency percentage.

^{_{Subscribers  do not see these advertisements}}

 

[tankerpaul50]

Thanks for all you input I havealittle more knowledge. now

 

[Lenny HB]

We find that our two E bikes draw a lot of power when charging.
Would suggest charging them when moving if possible.

I charged both ours from nearly flat one evening it took 3-4 days including a bit of driving to get the leisure batteries fully recharged with 200 watts of solar that was in France in June. Now tend to top them up rather than let them get too flat.

I would also get a pure sine wave inverter e-bike battery chargers are not cheap so not worth the risk with a modified sine wave one.

 

[Seakerr]

You all presuppose upon my insignificant knowledge.
I would like to be able to charge the batteries for two electric bicycles while dry camping. What power of inverter would I require and how is it fitted?
Seakerr

^{_{Subscribers  do not see these advertisements}}

 

[Lenny HB]

You all presuppose upon my insignificant knowledge.
I would like to be able to charge the batteries for two electric bicycles while dry camping. What power of inverter would I require and how is it fitted?
Seakerr

To answer we need to know what size batteries and the rating of the chargers.
What do you mean dry camping?

 

[Robert Clark]

To answer we need to know what size batteries and the rating of the chargers.
What do you mean dry camping?

Dry camping is when the beer runs out

 

[Seakerr]

Thanks Lenny and Robert.
(An impressive number of posts you have!)
By dry camping I mean having no hook up as in some CLs and French Aires....or at the Peterborough Show.
We've to collect our bikes before the show - hopefully and I'll check the batteries and chargers and come back.
Seakerr.

^{_{Subscribers  do not see these advertisements}}

 

[Peter & Elaine]

We have a 800 watt invertor with 280 watt of panels
I normally on a reasonable sunny day charge both our e batterys in the morning for about 1 hour
Never had a problem yet

 

[Lenny HB]

Apart from the unfortunate problem that usually we don't ride at night so you need two sets of e-bike batteries to be sure of pulling off daytime charging.

Ouch! A bit of a luxury spending over a 1000 quid for a couple of spare batteries.

 

[Lenny HB]

Thanks Lenny and Robert.
(An impressive number of posts you have!)
By dry camping I mean having no hook up as in some CLs and French Aires....or at the
.

You confused us we (Funsters) tend refer to wild camping, Aires etc. without EHU as camping off grid.

^{_{Subscribers  do not see these advertisements}}

 

[Seakerr]

I'll try to get my terminology right! We sailed for years and I still talk about things being "forward" or "aft" and the "heads" and "galley". No wonder I'm confused!
Great info about the inverters. We can look around at the show on Friday.
Seakerr.

 

[Lenny HB]

I'll try to get my terminology right! We sailed for years and I still talk about things being "forward" or "aft" and the "heads" and "galley". No wonder I'm confused!
Great info about the inverters. We can look around at the show on Friday.
Seakerr.

Do you shout "Starboard" every time someone gets in your way on the road?