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Helpful solar formulas you can use as a guide.

Posted by Frank Molina, Stellavolta on May 19th 2020

What amperage does my charge controller need to be? Take the solar array's Watts and divide by the battery bank voltage to arrive at the approximate Amp Hour charge controller you will need. Solar A

Is it possible to connect a charge controller in parallel to charge a battery bank?

Yes, it is possible to connect a charge controller in parallel to charge a battery bank where each charge controller will have its own solar array.

Is the SMA SI6048-US-10 Sunny Island 6048 Inverter/Charger an MPPT or PWM charge controller?

The SMA SI6048-US-10 Sunny Island 6048 Inverter/Charger is not a charge controller. If you need a charge controller in addition to the Sunny Island Inverter/Charger, you would need to purchase a separ

Are the OutBack Power FXR inverters compatible with the older model FX inverters?

No, the OutBack Power FXR inverters are not compatible with the older model FX inverters.

Why do the MNEPV 300VDC circuit breakers have a negative and positive sign?

The minus-minus |- -| symbol that you see on the breaker is not negative. Instead, it is the lesser of the positive side. It is referencing the direction of current flow. On these breakers, the plus-p

Are the wheels on the Berg Basic Blue plastic?

Yes, the wheels are a heavy duty plastic.

Are SMA Sunny Boys supposed to come with a mounting bracket?

No, the upgraded "-41" models do not include a separate mounting bracket because it's built into the newer units to make installation easier.

Helpful formula: How do you determine the charge controllers wattage capability?

Take the charge controller amperage, multiply that by the batter bank voltage to arrive at the watts the charge controller is capable of handling. This is only a guide. Amps x Volts = Watts

Is the SMA SB RS 485-N Communication Card RS-458 Module (485USPB-NR) Piggy Back compatible with Sunny Island Inverters?

Yes, the SMA RS 485-N (485USPB-NR) is compatible with boy Sunny Boys and Sunny Islands. Here is an SMA link to an informative video by SMA on how to use the card.