Charging an EBike on the road

[jumar]

The Lithium will charge off Solar...but will charge quicker with a B2B...and it will charge in any weather conditions..
I have both...Solar whilst stationary, B2B and Solar whilst driving....

 

[CRD]

Lithium 160ah, Solar 400w charging 2 x 750wh powered bikes for the past 2 days after two 40km rides with an average of 800 m of climb..
Bikes now resting at 70% charge ready for another 36km ride in the hills today.
Lithium has 75% charge...will repeat the process this afternoon ....when moving on tomorrow having partly depletion of the lithium, the Solar and DC2DC will refresh everything as the process starts again...I used to think eBike charging from a MH was challenging....but now I don't...it's Magic...

Your setup is interesting as we’re tackling the eBike charging issue too.

We have two 800Wh eBike batteries to charge. Which inverter do you use and do you reckon that a single 120W panel would be Ok, for the solar input?

We currently have a 30A B2B, 2x110Ah AGM leisure batteries and no inverter. I’d be happy to upgrade to lithium but am keen not to over specify the inverter.

Thanks

 

[suavecarve]

but am keen not to over specify the inverter.

Does both our batteries quite easily and has dropped price at the moment

 

[jumar]

I suggest you get an inverter that provides enough power to charge your eBikes...our Pure sine wave 2000w Renogy inverter isn't installed just to charge our bikes....we changed the way we cook in our van, using more electrical appliances.
Our van as you have read is well equipped in both Lithium and Solar.
And a bonus for us is we live in Spain taking advantage of solar harvesting..
Only today I completed the installation of another 200w panel. This helps in the winter months...

 

[Lenny HB]

I would get a decent quality inverter like a Victron I'm sure it was charging ours from a Chinese pure sine one similar to what suavecarve linked to is what did in one of our bike batteries.

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

 

[CRD]

I would get a decent quality inverter like a Victron I'm sure it was charging ours from a Chinese pure sine one similar to what suavecarve linked to is what did in one of our bike batteries.

Thanks, Lenny HB I see that you use the Multiplus 3000. Is that the Multiplus-ll version?

 

[suavecarve]

I'm sure it was charging ours from a Chinese pure sine one similar to what @suavecarve linked to is what did in one of our bike batteries.

Probably have a word with your installer

 

[Lenny HB]

Thanks, Lenny HB I see that you use the Multiplus 3000. Is that the Multiplus-ll version?

Yes, good bit of kit.
RogerIvy Off Gridd Power solution does them at a very good price and you get a Funster discount.
. https://offgridpower.solutions/

 

[activecampers]

Inverters are inefficient in this respect.
12v DC converted to 240v AC converted to 36/48v dc

Why not get a decent DC converter designed for the purpose? 12v dc-->36v dc in our instance, much more efficient.

Just be aware that a 10ah 36v battery (360wh) takes 30ah out of a 12v battery. We've plenty of battery/solar/b2b so its never an issue. Also be aware a 12v "cigarette" socket will become hot charging at 2a (2a @36v = 6a @ 12v) - so cheap connections = high resistance = heat = melt mess at best. Using decent connections. We use "hela" connections for high current 12v stuff.

eg https://www.ebay.co.uk/itm/18592979...pid=5339023013&customid=&toolid=10001&mkevt=1 with 12v plug changed (connection to bike varies but the had the one we needed)

 

[Lenny HB]

Inverters are inefficient in this respect.
12v DC converted to 240v AC converted to 36/48v dc

Why not get a decent DC converter designed for the purpose? 12v dc-->36v dc in our instance, much more efficient.

It's possible but you have trick the battery into thinking it's on the correct charger.

Not reallyworth the efgor for the few percent you save.

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

 

[treblid]

Nor the lack of safety from not having the correct battery charger communication from battery to charger.

 

[CRD]

Yes, good bit of kit.
RogerIvy Off Gridd Power solution does them at a very good price and you get a Funster discount.
. https://offgridpower.solutions/

Also a big bit of kit. It’ll be a challenge locating it within 2m of the battery.

I spoke to Off Grid Solutions today, and am waiting for a quote from them.

I haven’t got the electrical skills that you have, so will require professional installation and configuration.

 

[LesW]

Why not get a decent DC converter designed for the purpose? 12v dc-->36v dc in our instance, much more efficient.

We've been using something like this for a few years, no inverter, works a treat.

 

[CRD]

I suggest you get an inverter that provides enough power to charge your eBikes...our Pure sine wave 2000w Renogy inverter isn't installed just to charge our bikes....we changed the way we cook in our van, using more electrical appliances.

We want to use more electrical appliances for cooking too, as well as charging the eBike batteries.

We’re getting close to our GVM and can’t add much more solar, unfortunately.

 

[Lenny HB]

Also a big bit of kit. It’ll be a challenge locating it within 2m of the battery.

I spoke to Off Grid Solutions today, and am waiting for a quote from them.

I haven’t got the electrical skills that you have, so will require professional installation and configuration.

Yep they big and heavy, mines in the garage with the rest of the electrics it was a 4½ m cable run, you just have to use bigger cables.

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

 

[activecampers]

It's possible but you have trick the battery into thinking it's on the correct charger.

Not reallyworth the efgor for the few percent you save.

Not in our case, the battery doesn't care.
But fair point - some might.

 

[Lenny HB]

Not in our case, the battery doesn't care.
But fair point - some might.

Wouldn't risk it with my battery costing £800.

 

[jumar]

Wouldn't risk it with my battery costing £800.

Mine too Lenny.. my bike supplier or any third party supplier...will not offer any suitable plug that allows our bikes to be charged....except the one supplied..the batteries are custom built by Samsung..