Sunsaver MPPT and 350 W solar panels with monitoring

[dj_trefle]

Hello,

After spending lots of time trying to understand each part of a solar installation I would like to be sure that I chose the right components.

I have two 175 Watt solar panels (Powerglaz SMT 48) which have a short-circuit current of 8A and an open-circuit voltage of 29.4V. I need to supply a monitor (consumption: 30W) 8 hours a day and 5 days a week. The purpose of this screen is to display information concerning the energy coming from the solar panels.

To measure this energy I found the Sunsaver MPPT regulator which seems to be a go solution. Because of the solar panels power which is more than 200W I need a 24V battery (two 12V 55Ah AGM deep cycle batteries in serie). The two solar panels would be connected in serie.

Between the sunsaver regulator and the display I will use a 24V DC/220V AC converter.

1) Do you think that all these components can work together ?
2) Will the batteries be protected of deep discharge ? can I set up the batteries voltage to disconnect load ?

2) Concerning Sunsaver monitoring, I know that we can follow the energy produced to charge the battery and supply the load but is it possible to know the energy available from the solar panels (even if I do not use all this energy during the summer for instance) ?

Thank you for your help !
Matthieu

[Mike90250]

Check the specs, but i think the sunsaver has a computer output, you may need a $30 dongle from Morningstar to adapt it to your compters serial port.

From the draw of your monitor, you may end up consuming all the power you produce. I don't know if the inverter you've chosen has a low power mode, or if you will need to turn it off when you are not using the monitor, to save battery power.

Never connect the inverter to the LOAD terminals of the controller, it's ornly for a small lightbulb.

[crxvfr]

Never connect the inverter to the LOAD terminals of the controller, it's ornly for a small lightbulb.

Copy. paste, save.

Yet another incidental tip that could save me (big) from screwing things up.

That is exactly what I was going to do.

[Mike90250]

Copy. paste, save.

Yet another incidental tip that could save me (big) from screwing things up.

That is exactly what I was going to do.

It's actually in the manual too! if anyone still reads off of paper.

[crxvfr]

It's actually in the manual too! if anyone still reads off of paper.

ha. I still don't want or have a cellphone. ...but I love google.

And, ..I have a sunsaver. It was one of the first things I bought, then found out it was too small. I still have a use for it but um, excuse me sir. My manual says The SS-MPPT load output connection will provide battery voltage to systems loads such as lights, pumps, motors, and electronic devices with a 15 amp limit.

Your point about referring to the paper manual not missed.

[dj_trefle]

Thanks for your help,

From the draw of your monitor, you may end up consuming all the power you produce

Does it mean that I will not be able to know the energy available ? I know that I will use all the energy produce but no all the energy available (except maybe during the winter...), how can I do ?

Concerning the sunsaver MPPT, it is written in its manual :

The total current draw of all system loads
connected to the SS-MPPT LOAD terminals cannot
exceed the 15A load current rating

I think it is enough for the inverter ?

Matthieu

[Mike90250]

15A into an inverter @ 12V, gives you 180w output (not counting losses.) It can be very easy to exceed the 15A limit, and then something bad happens inside the controller.

[dj_trefle]

OK thank you,

and concerning the measure of the available energy from the solar panel ?

Matthieu