Projoy Review (Philippines): DC Protection Nobody Asks About Until It Fails
Published specifications for the DC isolators, PEBS breakers, SPDs and rapid shutdown. A brand ships several series, so these figures describe this model and not every product the manufacturer sells.
- Rated voltage
- not publishedVaries by part. Rating matters more than brand here: a breaker must match your array voltage and current, and a well-made part at the wrong rating protects nothing.
- Type
- DC isolation switches, DC miniature circuit breakers, surge protection devices, DC fuses and rapid shutdownPlus smart meters and microinverters. The PEBS breaker series uses arc-extinguishing and current-limiting design for overload and short-circuit protection.
- Certification
- not publishedNot stated in the sources we checked.
- Warranty
- not publishedNot stated in the sources we checked.
- Why DC-rated matters
- DC arcs do not self-extinguish at a zero crossing the way AC doesWhich is why DC-rated breakers and isolators carry dedicated arc-extinguishing systems, and why an AC breaker must never be substituted.
- Philippine channel
- IAN Solar, across Luzon, Visayas and MindanaoIAN Solar also distributes Jinko, JA Solar, Solis, Dyness and Pylontech, so if your installer sources through that channel Projoy parts may already be in your quote. Suntree, also carried by IAN Solar, is the alternative with a confirmed channel.
Source: Projoy Electric. Checked 2026-09-28. Manufacturers revise specifications between series without notice — confirm the figures for the exact model you are quoted before you pay.
What it does well
- A named Philippine distributor in IAN Solar operating across Luzon, Visayas and Mindanao, which most protection-component brands sold here lack.
- A full DC-side range covering isolators, breakers, surge protection, fuses and rapid shutdown, so one channel can supply the whole protection layer.
- A named distributor matters more in this category than most, because counterfeit and mis-rated parts are a genuine problem and a 1000 V DC isolator from an unbranded seller may be neither.
Where it falls short
- No consumer-facing presence, so you cannot buy or verify it yourself and it arrives only through your installer.
- Little independent long-run field data in the Philippine market specifically, and most installers will not volunteer the brand unless asked.
- Correct specification matters more than brand choice, so the useful action is checking protection is on the quote at all and correctly rated rather than price-shopping isolators.
Nobody shops for a DC isolator. It is the component buyers skim past on a quote, and it is also the one most likely to be quietly downgraded to win a price comparison — which matters, because DC protection is what stands between a faulty array and a roof fire.
Projoy Electric, founded in 2011 and headquartered in Suzhou, is one of the specialists in exactly this category. It reaches the Philippines through IAN Solar, which also distributes Jinko, JA Solar, Solis, Dyness and Pylontech here — so if your installer sources through that channel, Projoy parts may already be in your quote.
What Projoy makes
The range is protection, safety and metering for PV and energy storage:
- DC isolation switches, including cage-type isolators and enclosed units
- DC miniature circuit breakers — the PEBS series, with arc-extinguishing and current-limiting design for overload and short-circuit protection
- DC surge protection devices (SPD)
- DC fuses
- Rapid shutdown devices, including module-level
- Smart electricity meters and microinverters
That covers most of the DC-side protection a Philippine residential or small commercial array needs.
Why this category deserves attention
DC faults behave differently from AC ones. DC arcs do not self-extinguish at a zero crossing the way AC does, which is why DC-rated breakers and isolators are built with dedicated arc-extinguishing systems and why an AC breaker must never be substituted.
Three things follow for a Philippine buyer:
- Rating matters more than brand. A breaker must match your array’s voltage and current. Our DC breaker sizing guide covers how to check the number on your quote.
- Surge protection is not optional here. The Philippines gets serious lightning activity, and a surge event travels the DC side into your inverter. See surge protection and lightning and hail damage.
- Rapid shutdown is a firefighter-safety feature, de-energising the array at module level. Not universally mandated here, but worth understanding.
Local availability
Distributed through IAN Solar, which operates across Luzon, Visayas and Mindanao. That gives Projoy something most protection-component brands sold here lack: a named Philippine distributor rather than an anonymous marketplace listing.
That matters in a category where counterfeits and mis-rated parts are a genuine problem. A “1000V DC” isolator from an unbranded seller may not be either of those things, and you will not discover it until it is asked to interrupt a fault.
The alternative brand in this space with a confirmed Philippine channel is Suntree, also carried by IAN Solar, which makes DC isolator switches in the 300V-1000V range.
What it costs
Protection components are a small fraction of system cost and a large fraction of system safety. We do not publish component-level pricing — it moves by seller and specification, and the figure that matters is what your whole installed system costs: ₱45,000-75,000 per kW, per the price list.
The useful action is not price-shopping isolators. It is checking they are on the quote at all, correctly rated. A quote that itemises protection is telling you something good about the installer; one that does not is worth a question. See how to choose a solar installer.
Where it falls short
- No consumer-facing presence. You will not buy Projoy directly; it arrives via your installer.
- Little independent long-run field data in the Philippine market specifically.
- Specialist, not a household name, so most installers will not volunteer the brand unless asked.
- Correct specification matters more than brand choice — a well-made part at the wrong rating protects nothing.
Who it’s best for
Buyers who want to check that the unglamorous half of their system is properly specified, and installers sourcing DC protection through a distributor with a Philippine presence.
For the broader picture of what should be protecting your array, start with the circuit protection and safety roundup, then check your own quote against DC breaker sizing.