OOYCYOO 100A An MPPT Solar Charge Controller Review: Supports 1300W on 12V and 2600W on 24V Systems

Where the OOYCYOO 100A Fits

OOYCYOO 100A MPPT Solar Charge Controller regulates 100A for buyers who need a 12V or 24V controller.

If your battery bank is 12V or 24V, the controller has to match that system voltage before anything else matters.

OOYCYOO 100A works with 12V and 24V batteries, and its 100A charge current gives it room for charging jobs that need more than a small-controller rating.

We screened 83 MPPT solar charge controllers and selected 15 for full review. OOYCYOO has 366 buyer ratings, the 12th most of the 83 screened, and full reviews go to the most-rated products that pass screening, at most 2 per brand. This review is for you if you need a 12V or 24V MPPT solar charge controller with LCD monitoring and Flooded battery support.

The Short Answer on the OOYCYOO 100A

Best for: you need a 12V or 24V solar setup that can use a 100V PV input limit and 100A charging headroom.

Choose the OOYCYOO 100A if your array and battery bank fit those limits, at around $142.49.

• Pro: Its 100A charge current gives you room for bigger RV, cabin, or backup charging loads.
• Pro: The 2,600W solar input rating on 24V systems supports larger panel arrays without clipping available harvest.
• Pro: It supports 12V and 24V batteries, plus lithium, LiFePO4, flooded, sealed, and gel settings.
• Con: The 100V PV limit rules out longer series strings, so remote cabin layouts that need 150V headroom will not fit.
• Con: The 3.7 average across 366 buyer ratings leaves less buyer confidence than higher-rated controllers in this category.

Don’t buy this if: your solar array needs a 150V PV input limit for a long series string.

Price assessment: Around $142.49 is fair for a 100A MPPT controller with 12V/24V support and 2,600W input capacity.

Optimization is key, so view our guide to the best mppt solar charge controller for 24 volt solar setup.

The Specifications That Matter for this PV charge controller

Max PV input power separates this OOYCYOO 100A most clearly. It measures the highest solar power the controller can process from the panels.

Before You Buy: an MPPT solar charge controller Checklist

The first thing to check is your battery bank voltage and panel string voltage, because this controller is made for 12V or 24V banks and a 100V PV input limit.

• ☐ Confirm your battery bank is 12V or 24V — this controller is built for those system voltages, and the wrong bank voltage can leave you with a unit that will not charge your setup correctly.
• ☐ Measure your panel string open-circuit voltage and keep it within 100V PV — a higher string can overvolt the controller and force a replacement after purchase.
• ☐ Check your array size against 2,600W at 24V, or 1,300W at 12V — if your panels exceed that limit, the controller can waste available solar power and leave the bank undercharged.
• ☐ Confirm your battery chemistry is one of the listed types, including Lithium and LiFePO4 — if it is not, you may need a different controller to avoid odd charging behavior.
• ☐ Budget for a 100A charge current — a smaller controller can leave battery capacity undercharged, especially on larger RV or backup arrays.
• ☐ Check that you want LCD status readout and Flooded support — those are stated here, but if you need a different display or battery profile, you will need another model.

Do not buy this if your array needs more than 100V PV input or your bank is neither 12V nor 24V.

Performance: What the Specs Deliver

What 2,600W panel capacity means for this charge controller

OOYCYOO 100A gives you 100A of charge output, so a 12V RV bank, a 24V off-grid bank, or a daily-cycling van setup has enough charging headroom for normal solar use. Its 2,600W panel limit at 24V is the figure that matters for array sizing, while the 1,300W figure at 12V keeps smaller banks in a narrower range.

That split matters because the controller is not just a current number; it also sets how much array power you can bring in at each system voltage. At 12V, the solar input is sized for moderate rooftop arrays, while 24V opens room for larger cabin or backup arrays without wasting available panel capacity. Think of it like a branch circuit with a breaker rating and a load limit: both numbers matter, and the lower one sets the ceiling for that setup.

Battery type settings for Flooded, Sealed, Gel, and Lithium

OOYCYOO 100A lets you choose Flooded, Sealed, Gel, Lithium, LiFePO4, or Li(NiCoMn)O2, so you can match the controller to the battery chemistry you already own. The programmable absorption voltage, floating voltage, and low-voltage disconnect give you the settings needed for a bank that charges and disconnects to the right targets.

That flexibility matters if you are building around a lithium bank in a van or a flooded lead-acid bank in a cabin, because the charging profile is not one-size-fits-all. The 12V and 24V battery support keeps the controller tied to common off-grid architectures, while the load timer adds control over when the load output stays active. If your battery chemistry is fixed, the setting menu matters more than the headline current.

Protection and cooling features in this PV charge controller

OOYCYOO 100A includes overcharge, over-discharge, overload, short-circuit, reverse-polarity, over-heat, and battery-under-voltage protection, so the controller covers the failure cases that can shut down a solar system.

Common Buyer Jobs Checked Against the OOYCYOO 100A’s Specs

The OOYCYOO 100A against the jobs buyers ask about, worked out from its listed max PV input voltage and max PV input power and max charge current and a typical need for each job.

How the OOYCYOO 100A Compares to Other MPPT solar charge controllers

OOYCYOO 100A gives you 100A charging, 100V PV input, and 2,600W of PV power handling for $142.49. That combination is the strongest power-handling package in this comparison.

• Against the Ampinvt AP-120C, OOYCYOO 100A costs the same at around $142.49, but it stays in the 100V PV input class while Ampinvt states 150V.
• Against the POWLAND 100A, both controllers state 100A charge current, so the difference is in solar input headroom: OOYCYOO lists 100V, while POWLAND lists 150V.
• Against the PowMr 100A, OOYCYOO 100A has the higher stated PV power figure at 2,600W. PowMr lists 1,200W on 12V, 2,400W on 24V, 3,600W on 36V, and 4,800W on 48V.
• Against the OAE 60A, OOYCYOO 100A gives you 100A output capacity instead of 60A. That extra current matters when your array and battery bank need a larger charging ceiling.
• Against the other OOYCYOO listing, this model states 100V PV input and 2,600W solar power. The related KP60 is priced around $162.44, so this one is the cheaper option.
• Among the six compared listings, OOYCYOO 100A ranks 5th on buyer rating. It sits at 3.7 from 366 ratings, while several rivals score higher.

Pick the Ampinvt AP-120C instead if you need 150V PV input and 120A charging current. Pick the PowMr 100A if your array needs 160V input support.

For a more compact option, see our full review of the KP60 100.

You might also consider the Renogy Rover 30A performance review for smaller systems.

From Delivery to First Use with This Mppt Charge Controller

Getting OOYCYOO 100A ready for a 12V or 24V bank

OOYCYOO 100A needs a 12V or 24V battery bank before it does anything useful.

1. Confirm your battery bank is 12V or 24V, because the controller is built for those two system voltages.
2. Match the solar array to the 100V PV limit, since the controller cannot accept a higher input voltage.
3. Size the array for the system voltage you are using: 1,300W at 12V or 2,600W at 24V.
4. Select the battery type in the LCD menu from Flooded, Sealed, Gel, Lithium, LiFePO4, or Li(NiCoMn)O2.
5. Set the absorption voltage, floating voltage, and low-voltage disconnect to the values your bank needs.

Use battery cables to connect the controller to the battery bank. Use PV wire that stays within the 100V PV input limit, and fit a fuse or breaker rated for 100A on the battery side. A wrong match can waste a return and force a rebuild of the wiring set.

Warranty and support checks for this an MPPT solar charge controller

Cover differs by seller and country.

• Confirm the seller name, because warranty handling can change with the seller you bought from.
• Confirm the return window, because the 100A controller and its fan are not user-serviceable parts.
• Confirm the support contact path, because the LCD settings and battery-type selection may need help if the bank does not charge correctly.
• Confirm what is covered for damage from reverse polarity or short circuit, because those protection features do not replace seller coverage.

On the day it arrives, record the box condition and power it only after you confirm the 12V or 24V setting, the 100V PV limit, and the battery type.

The OOYCYOO 100A: Remaining Questions

What the 100V PV limit means for panel strings

The 100V PV limit means your panel string has to stay under 100V open-circuit voltage. That keeps the controller inside its stated solar input ceiling and rules out long series strings for remote cabins.

Can the OOYCYOO 100A let me wire panels in series the way I want?

No, the OOYCYOO 100A does not let you wire panels in series the way you want. Its maximum input voltage is 100V PV, so the string voltage has to stay under that limit. If your array design needs longer series runs, this controller is not the right fit.

Will the OOYCYOO 100A work for a 12V or 24V battery bank?

Yes, the OOYCYOO 100A works with 12V and 24V battery banks. That makes it suitable for either common off-grid battery architecture. The battery setting still needs to match the bank you are actually using.

How much solar input can the OOYCYOO 100A handle?

The OOYCYOO 100A handles 2,600W at 24V and 1,300W at 12V. That split matters because the same controller supports different array sizes depending on bank voltage. If your system is built around a 24V bank, the higher figure is the relevant one.

Does the OOYCYOO 100A support lithium batteries?

Yes, the OOYCYOO 100A supports lithium, LiFePO4, Li(NiCoMn)O2, flooded, sealed, and gel batteries. That broad battery selection helps if you are matching an existing bank type. Flooded is also one of the selectable settings.

Is the OOYCYOO 100A worth buying for a larger RV or backup array?

The OOYCYOO 100A gives you 100A of charge current and 2,600W of PV capacity at 24V. That combination suits a larger RV or backup array better than a small cabin controller. The price is around $142.49, and the listing carries a 3.7 average from 366 buyer ratings.

Is the OOYCYOO 100A Right for You?

Who the OOYCYOO 100A suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This an MPPT solar charge controller

MPPT solar charge controllers are sold by the retailers below – we do not track which of them has the OOYCYOO 100A in stock, so check availability and the current price with the retailer before making a trip.

• Northern Tool (online and physical stores) — specialist staff
• BatteryStuff.com (online only) — specialist range
• Renogy (online only) — brand-direct specialist range
• Victron Energy (online only) — specialist range
• Walmart (online and physical stores) — broad marketplace selection
• Amazon (online only) — breadth of range
• Home Depot (online and physical stores) — in-store returns

Final Verdict on the OOYCYOO 100A

You should choose this OOYCYOO 100A if your system is 12V or 24V and your array needs a 100V PV limit with up to 2,600W at 24V. Around $142.49 makes it a practical fit when you need 100A charging without moving into a higher-voltage controller.

The strongest figure here is the 100A charge current, paired with 12V/24V battery support and a 100V solar input ceiling. That combination suits RV and backup builds that need more charging headroom than a 40A controller can offer, while staying inside a 12V or 24V bank.

Skip it if: your array needs a 150V PV input limit, or your battery bank is 48V. It also makes less sense if you want a controller with RS485 or Modbus communication, since that is not stated here.