What size solar panel do you need to charge a 150ah battery? Enter the battery specs into our solar panel size calculator to find out, or use the tables given below this page.
Calculate what size solar panel for 150ah battery
Note: If you already have a solar panel and want to know how long it will take to charge your 150ah battery, use our solar battery charge time calculator.
Calculator Assumptions
- Battery charge efficiency rate: Lead-acid, and AGM: 85%; Lithium: 99% {1}
- Charge controller efficiency: PWM: 80%; MPPT: 98%
- Solar panel output efficiency in real world conditions: 80%
How to use this calculator?
- Enter battery capacity in amp-hours (Ah): I've already put 150 for you.
- Enter the battery volts: Is this a 12, 24, 36, or 48 volts battery?
- Select the battery type: Do you have a lead-acid, AGM, or lithium-ion (LiFePO4) battery?
- Enter the battery depth of discharge (DoD): Battery DoD is the percentage of the battery that has been discharged relative to the total battery capacity. For half discharged battery, ENTER 50. If the battery is fully discharged which you can achieve on a lithium battery, ENTER 100.
- Select charge controller type: Are you using a PWM or MPPT charge controller to charge the battery?
- Enter desired charge time (in peak sun hours): How fast would you like to recharge your battery in peak sun hours? Click here to read about peak sun hours and how to calculate them.
After entering the information, click “Calculate" button to find out the required solar panel size for your 150ah battery.
Example
Suppose you have a 12v 150ah lead-acid battery with 50% depth of discharge and an MPPT charge controller. You want to recharge your battery in one day and your location receives 6 peak sun hours daily.
You need a 210 watt solar panel to fully charge a 12v 150ah lead-acid battery from 50% depth of discharge in 6 peak sun hours using an MPPT charge controller.
Read the below post to find out how fast you can charge your battery.
Related Post: Guide: Maximum Charging Current & Voltage For 12v Battery
What Size Solar Panel To Charge 12v 150ah Lead-Acid Battery?
| Charge Time | Charge controller type | Required solar panel size |
|---|---|---|
| 4 peak sun hours | PWM | 370 watts |
| 5 peak sun hours | PWM | 300 watts |
| 6 peak sun hours | PWM | 250 watts |
| 10 peak sun hours | PWM | 150 watts |
| 15 peak sun hours | PWM | 100 watts |
| 20 peak sun hours | PWM | 75 watts |
| 4 peak sun hours | MPPT | 310 watts |
| 5 peak sun hours | MPPT | 250 watts |
| 6 peak sun hours | MPPT | 210 watts |
| 10 peak sun hours | MPPT | 125 watts |
| 15 peak sun hours | MPPT | 80 watts |
| 20 peak sun hours | MPPT | 60 watts |
Summary
- You need about 250 - 300 watt solar panel to charge a 12V 150Ah lead-acid battery from 50% depth of discharge in 5 peak sun hours.
What Size Solar Panel To Charge 12v 150ah Lithium (LiFePO4) Battery?
| Charge Time | Charge Controller Type | Required solar panel size |
|---|---|---|
| 4 peak sun hours | PWM | 660 watts |
| 5 peak sun hours | PWM | 520 watts |
| 6 peak sun hours | PWM | 440 watts |
| 10 peak sun hours | PWM | 260 watts |
| 15 peak sun hours | PWM | 175 watts |
| 20 peak sun hours | PWM | 130 watts |
| 4 peak sun hours | MPPT | 550 watts |
| 5 peak sun hours | MPPT | 440 watts |
| 6 peak sun hours | MPPT | 365 watts |
| 10 peak sun hours | MPPT | 220 watts |
| 15 peak sun hours | MPPT | 145 watts |
| 20 peak sun hours | MPPT | 110 watts |
Summary
- You need around 450 - 500 watt solar panels to charge a 12V 150Ah lithium battery from 100% depth of discharge in 5 peak sun hours.
What Size Solar Panel To Charge 24v 150ah Lead-Acid Battery?
| Charge Time | Charge Controller Type | Required solar panel size |
|---|---|---|
| 4 peak sun hours | PWM | 750 watts |
| 5 peak sun hours | PWM | 600 watts |
| 6 peak sun hours | PWM | 500 watts |
| 10 peak sun hours | PWM | 300 watts |
| 15 peak sun hours | PWM | 200 watts |
| 20 peak sun hours | PWM | 150 watts |
| 4 peak sun hours | MPPT | 620 watts |
| 5 peak sun hours | MPPT | 500 watts |
| 6 peak sun hours | MPPT | 415 watts |
| 10 peak sun hours | MPPT | 250 watts |
| 15 peak sun hours | MPPT | 165 watts |
| 20 peak sun hours | MPPT | 125 watts |
Summary
- You need around 500 - 600 watt solar panels to charge a 24V 150Ah lead-acid battery from 50% depth of discharge in 5 peak sun hours.
What Size Solar Panel To Charge 24v 150ah Lithium (LiFePO4) Battery?
| Charge Time | Charge Controller Type | Required solar panel size |
|---|---|---|
| 4 peak sun hours | PWM | 1310 watts |
| 5 peak sun hours | PWM | 1050 watts |
| 6 peak sun hours | PWM | 870 watts |
| 10 peak sun hours | PWM | 520 watts |
| 15 peak sun hours | PWM | 350 watts |
| 20 peak sun hours | PWM | 260 watts |
| 4 peak sun hours | MPPT | 1090 watts |
| 5 peak sun hours | MPPT | 870 watts |
| 6 peak sun hours | MPPT | 730 watts |
| 10 peak sun hours | MPPT | 440 watts |
| 15 peak sun hours | MPPT | 290 watts |
| 20 peak sun hours | MPPT | 220 watts |
Summary
- You need around 850 - 1000 watt solar panels to charge a 24V 150Ah lithium battery from 100% depth of discharge in 5 peak sun hours.
150Ah Battery: FAQs
12v 150ah battery is equal to 1800 watt-hours. to calculate the battery watts use this formula (battery Ah × battery volts)
150ah battery will take between 5-20 hours to charge, the exact number will depend on the size of the solar panel.
You need 30 amps to fully charge a 150ah lithium battery in 5 hours from 100% depth of discharge.
