8 tips for choosing the off-grid solar inverter

<p>When choosing a suitable <a href="https://www.pvsolartech.com/prosine-off-grid-electric-inverter" rel="noopener noreferrer" target="_blank"><strong>off-grid solar inverter</strong></a>, there are 8 tips to consider, let us look at the following.</p><p><br></p><p>1. The output voltage and frequency of off-grid solar inverter. This will be based on your load requirements and is usually the same as the standard power supply voltage/frequency in your country.</p><p><br></p><p>2. Install grid-connected solar inverter or hybrid inverter. Most <a href="https://www.pvsolartech.com/off-grid-inverter" target="_blank">off-grid solar inverters</a> and hybrid solar inverters have AC backup power connections, so in the absence of sunlight and battery discharge, the inverter can bypass it to power the load. In addition, you can use this AC backup power supply to charge the battery through the internal off-grid solar inverter battery charger.</p><p><br></p><p>Assuming that you have generated excess DC power from the solar cell array, and the battery has been fully charged, and the load works normally according to the output power of the solar panel, then in the case of a hybrid solar inverter, the excess AC energy will be fed back Give AC backup power (2-way/bidirectional), but in the case of off-grid solar inverters, excess energy cannot be returned to AC backup power (unidirectional). Therefore, we can say that hybrid solar inverters can operate as off-grid solar inverters, but not vice versa. In this step, you need to determine whether to use a solar off-grid inverter or a hybrid inverter.</p><p><br></p><p><img src="https://img80003070.weyesimg.com/uploads/q67dg84v.allweyes.com/images/15668016584350.JPG?imageView2/2/w/1000/q/100/format/webp" alt="Prosine off grid electric Inverter"></p><p><br></p><p>3. The output power of off-grid solar inverter. Just add the power consumption of all loads together and take care of inductive loads, such as motors with high surge/inrush current during start-up, please make them oversized to avoid underestimation, and finally, off-grid solar inverter The power of the device should be 110-120% of the total power of the load. Just like your load is 5kW, the power capacity of the off-grid solar inverter should be 6000 watts, and so on.</p><p><br></p><p><br></p><p><br></p><p>4. Off-grid solar inverter input DC voltage. After selecting the power capacity and brand/manufacturer of the off-grid solar inverter, there will be a corresponding DC input voltage range in the off-grid solar inverter specification table, and we need to select the battery voltage that matches it.</p><p><br></p><p>5. The inverter with built-in solar controller will be MPPT or PWM. MPPT is technically better because it can convert the high voltage of the solar panel to a lower voltage, so it can charge the battery with low loss (high efficiency), but its cost is higher than the PWM type. On the other hand, if we can properly adjust the size of the PWM solar charge controller type according to the specifications of the solar panel, then we can confirm that it is as effective as the MPPT charge controller type.</p><p><br></p><p><img src="https://img80003070.weyesimg.com/uploads/q67dg84v.allweyes.com/images/15668023065942.jpg?imageView2/2/w/1000/q/100/format/webp" alt="Xtender Inverter"></p><p><br></p><p>6. Battery charging requirements. These requirements are the maximum battery charging voltage and the cut-off voltage, and these two values ​​should match the solar energy of the grid inverter program range.</p><p><br></p><p>7. Maximum output voltage of solar panel and MPPT tracker. The maximum DC output voltage of the PV should not exceed the maximum DC input voltage of the off-grid solar inverter listed in its specifications. The MPPT tracker will refer to the number of inputs accepted by the inverter and will indicate according to the size of your solar cell array. It can ensure better tracking performance of the maximum power point.</p><p><br></p><p>8. Starter of backup power (generator). When<a href="https://www.pvsolartech.com/all-products/5000w-power-inverter-battery-charge-controller" rel="noopener noreferrer" target="_blank"><strong> off-grid solar inverters</strong></a> work in DC priority mode and the battery voltage is low, they are just 2-core dry contacts to start the generator, so it sends a signal to start the backup power source (generator)</p>