What solar cut-off to use?

[jnack]

Background:

2016 Tacoma 3.5L

Have a dual battery kit connected via Blue Sea ACR (Off grid engineering kit), utilizing two Odyssey Group 35-PC1400 AGM batteries, and I have a third battery in the bed of the truck wired in parallel to the aux battery which is a 100aH Gel Deep Cycle battery ( https://amzn.to/2Kzcy2p ). I have a 100W windy nation panel on the roof along with their 30A solar charge controller.

I recently discovered that the Tacoma alternator doesn't charge high enough to top off AGM batteries (there is an ECU tune that will modify this). For the solar charge controller what voltage should i have it cut-off? I believe the solar charge controller defaults to stop sending power to the batteries @ 13.8V. Should I be increasing this to the 14.4 range?

Appreciate it any assistance. Just trying to get the most out of this set-up...

Thanks!

 

[john61ct]

Odyssey is a top vendor

the data sheets even maybe a full manual should be easily available

Also can contact CS for direct comms with expert tech support

Make sure to not overcharge the GEL!

 

[jonyjoe101]

the oddesey requires 14.7 volts and the gel maxes out at 14.4 volts. If connected together (odessey/gel) the bulk voltage on the solar controller should be 14.4 volts. But one thing I would definitely check is the voltage at the battery terminals.
I have yet encountered a solar controller that had an accurate voltage compared to what the battery terminals read. The controller usually reads .5 voltage high. So if the controller reads 14.4 volts (full battery) the actual battery might read 13.9 volts (no where near a full charge) . Undercharging the oddeseys would be bad for them, I would at least try to get them to 14.4 volts.