loserextrodinaire
New member
- Joined
- May 21, 2020
- Messages
- 4
Hello everyone,
So my order for the POS charge controller from china got cancelled on aliexpress and i went and bought myself a 40a renogy rover mppt, and i bought the positive ground version because it was $50 cheaper than the negative ground version. So i have plans to use it hooked up with this 480w 12 to 24v step up converter with a switch in between so i can only turn it on during highway rides so i don't burn out the alternator. And also the charge controller will be wired to two 170w 12v panels in series that i have so i'll be able to have the 370wsolar+480w from alternator charging going even on sunny days, theoretically. But my main question is will this dc-dc converter fry the positive ground charge controller since the car battery is negative grounded? I'm running two cables from the car battery of course.
Here is the charge controller: https://www.amazon.com/gp/product/B07DNVTJHD/ref=ask_ql_qh_dp_hza
and the step up converter: https://www.amazon.com/gp/product/B081RFN1VJ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Anyway positive ground seems like a horrible idea, why is it even a thing? I think I'm gonna have to return this charge controller.
*Or should i set it up so that i by pass the charge controller all together and just hookup the dc dc converter to the battery pack directly and keep an eye on the voltage manually?
I chose 6s because 24v is basically 100% full whereas for 7s it would only charge it past 20% percent or so (24/7=3.42v)
Thank you in advance for any infoz!!!
So my order for the POS charge controller from china got cancelled on aliexpress and i went and bought myself a 40a renogy rover mppt, and i bought the positive ground version because it was $50 cheaper than the negative ground version. So i have plans to use it hooked up with this 480w 12 to 24v step up converter with a switch in between so i can only turn it on during highway rides so i don't burn out the alternator. And also the charge controller will be wired to two 170w 12v panels in series that i have so i'll be able to have the 370wsolar+480w from alternator charging going even on sunny days, theoretically. But my main question is will this dc-dc converter fry the positive ground charge controller since the car battery is negative grounded? I'm running two cables from the car battery of course.
Here is the charge controller: https://www.amazon.com/gp/product/B07DNVTJHD/ref=ask_ql_qh_dp_hza
and the step up converter: https://www.amazon.com/gp/product/B081RFN1VJ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Anyway positive ground seems like a horrible idea, why is it even a thing? I think I'm gonna have to return this charge controller.
*Or should i set it up so that i by pass the charge controller all together and just hookup the dc dc converter to the battery pack directly and keep an eye on the voltage manually?
I chose 6s because 24v is basically 100% full whereas for 7s it would only charge it past 20% percent or so (24/7=3.42v)
Thank you in advance for any infoz!!!