Solar power vs alternator to camper - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 09-16-2019, 07:10 PM Thread Starter
Karmutzen's Avatar
Join Date: Dec 2017
Posts: 44
Thanks: 8
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 11 Post(s)
Feedback Score: 0 reviews
Solar power vs alternator to camper

2006 F350 6.0 with a camper. House batteries recharge both by 300 watts of solar panel into a charge controller when the sun shines, and through the 7-pin when the engine is running. Is this normal? Can the solar push a higher voltage all the way through the 7-pin back into the truck engine?
Karmutzen is offline  
Sponsored Links
post #2 of 2 Old 09-17-2019, 02:43 AM
Premium Member
Jjorgis5569's Avatar
Join Date: Feb 2019
Posts: 247
Thanks: 10
Thanked 25 Times in 23 Posts
Mentioned: 3 Post(s)
Quoted: 64 Post(s)
Feedback Score: 0 reviews
I’m not familiar with your particular application, so I can’t speak to what is normal. I’m going to assume your 300W panels are 12VDC. Also don’t know if your controller is MPPT or pulse width modulation. An MPPT controller isn’t 100% efficient. 80-90% efficiency should be expected.

If you made your own panel, what is the rating for each pv cell? You can wire more cells in series to increase voltage. Your current panel is probably delivering about 25 amps with good sunlight, direction, and a clean surface. Remember anytime you double voltage, your amperage is inversely affected. At 24 volts, your amperage will be 12.5 (W/V=A). Your amperage is limited by wire size and controller output.

My personal opinion is that’s a lot of work to charge some lead acid batteries. I can offer a couple different solutions to get the same thing done. Obviously a traditional charger is a suggestion. Size an inverter that can work with your pv cells, or just buy a small generator. The other option, if space allows, is to wire in another set of batteries using a DPDT switch. When one set gets low, flip the sw to use the others while set 1 is charging.

That being said adding another panel, if yours is store bought, might be easier if the controller can handle it.
(Short story to illustrate)
When I had another water well dug I was overseas, so it was done over the phone. I wanted a strong pump and a freq drive. When I got home, I saw the traditional contacts and a big pressure tank. Looking at the invoice I notify the pump installed was only .5 hp. Obviously things were not to spec and the pump had to come out, but so was the wiring since it was good for 1/5 hp @ 110VAC, but not adequate for 2hp. Since a VFD was going in anyway, wiring the breaker to 240v cut the amperage in half, allowing it to be sufficient.

Last edited by Jjorgis5569; 09-17-2019 at 03:08 AM.
Jjorgis5569 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome