It may be that you can never get more than 12 13v.
Does the amperage increase with each additional solar panel.
Connect the ve solar controller output lead to the ve.
For the sake of example if you are getting 5 hours of direct sunlight per day in a sunny state like california you can calculate your solar panel output this way.
Wiring solar panels in parallel causes the amperage to increase but the voltage remains the same.
In fact by wiring several solar panels in series we increase the voltage keeping the same current while wiring them in parallel we increase the current keeping the same voltage.
With parallel solar panels the positive terminal from one panel is connected to the positive terminal of another panel and the negative terminals of the two panels are connected together.
5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh.
Measure the battery voltage.
Hopefully it is less than the solar panel controller output voltage.
The connection of multiple solar panels in parallel arises from the need to reach certain current values at the output without changing the voltage.
You can either wire multiple panels in series to increase voltage with current amps remaining the same as any one panel or wire the panels in parallel to increase current with the voltage output remaining the same as any one panel.
Though mixing different solar panels is not recommended it s not forbidden and things would be ok as long as each panel s electrical parameters voltage wattage amps are carefully considered.
How much energy does a solar panel produce.
In arranging solar panels you have two options for modifying the power output according the ohm s law.
Thus the output for each solar panel in your array would.
Measure the solar panel controller output voltage try to get maximum voltage by angling the panels.
When you intend to wire two panels produced by different vendors the vendors are not the problem.
Since each panel is 12v and the battery bank you want to charge is 24v then you need to series your system to increase the voltage.
If it is proceed.
