Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[MrDude_1]

so the problem with that, is the zero charger does not "slow down" to a couple days of charging. When that inverter is on, it will draw its normal wattage, and kill your batteries... unless they're large enough to fully charge the bike.
If I was charging the zero off of a 12v, 24v, 48v, etc battery source, I would skip the inverter and run a DC-DC converter. This lets you charge it at a more reasonable rate. Downside is it has to be smart enough to tell the bike its charging. You cant use the key-on trick.

Why not?  Key-on, closes the contactor, and full access to the battery is available at the controller terminals.  When my enable circuit was broken (failed on the way to my SCv2 install!) I charged with SCv2 for many months, always key-on.  (Zero fixed the enable circuit with a firmware update (!) ).
[/quote]
correct, but you're forgetting the other half of it.. the charger will not always be charging. So all night long and intermittently during the day, your bike is on with the key, but its not charging.

[togo]

Right, but with an inverter you could charge it an hour here,
and hour there, do a bit of a charge anytime your solar-fed RV
battery bank gets ahead of your RV living usage.

Obviously this kind of living has to be quite liesurely, you aren't
going to be riding 100 miles a day off your RV's solar unless you
have 10+ square meters for your motorcycle ontop of your other
RV-living uses (rough guesstimate based on 10 hours of sunlight,
10kwh battery, 10% efficiency).

[Shadow]

From experience with a loaner 2017 Zero FX, on a MorningStar SureSine 300 (peak 600W) fed by 400W of solar and 100AH 12V AGM battery, made it a few hours of groaning / screeching / clicky noises coming from both the FX' onboard charger and the inverter. The net effect on SoC for these few hours of charging was a gain of 2%.

[MrDude_1]

Right, but with an inverter you could charge it an hour here,
and hour there, do a bit of a charge anytime your solar-fed RV
battery bank gets ahead of your RV living usage.

Obviously this kind of living has to be quite liesurely, you aren't
going to be riding 100 miles a day off your RV's solar unless you
have 10+ square meters for your motorcycle ontop of your other
RV-living uses (rough guesstimate based on 10 hours of sunlight,
10kwh battery, 10% efficiency).

If you read the entire post I wrote that you took the snippet from, you would see that I was saying NOT to run an inverter at all, but run a high efficiency DC-DC boost supply. Its low wattage so there are tons of options. Running an inverter from lead-acid into a DC charger to charge the battery is just silly.
You get your solar loss to the battery, and then more loss when you do your higher amperage draw from the battery (peukert effect) and then the inverter efficiency loss and then the charger efficiency loss.
OR
You still get your solar loss to the battery, but then much less peukert effect from constant lower amperage draw, then the DC boost charger loss.

[togo]

Shadow: underpowered inverter, yes, you'd expect failure.

MrDude_1: yes, DC-DC would be more efficient.  But 12V+inverter could also work, and might be more acceptable for those uncomfortable with setting up the electronics.