Renogy 100W 16BB N-Type Solar Panel 4-Pack | 400W Total

N-Type silicon has fewer impurities than p-type PERC silicon, which results in higher cell efficiency, a lower temperature coefficient (less output lost on hot days), better low-light performance, and a longer useful lifespan due to reduced light-induced degradation (LID). In practical terms, each panel in this 4-pack delivers more usable energy per square foot over its lifetime compared to a comparable p-PERC panel.

Both are accurate and describe different things. The 25% figure is the N-Type cell efficiency — how efficiently the solar cells themselves convert sunlight. The 20% figure is the module efficiency — output relative to the total panel area including the frame, which produces no power. Module efficiency is always lower than cell efficiency. Both numbers are verified from manufacturer and authorized dealer sources.

For a 12V battery system, wire all four panels in parallel. This keeps the array voltage at roughly 22.79V Voc and combines current to about 21.2A Isc — you'll want an MPPT charge controller rated for at least 30A to have comfortable headroom. For a 24V system, wire in two parallel strings of two series panels each (2S2P). This doubles the voltage to roughly 45.58V Voc while keeping combined current at about 10.6A Isc — a 20A MPPT controller with at least a 50V input rating handles this configuration well. Always confirm your controller's maximum input voltage and current before finalizing your wiring.

For four panels wired in parallel into a 12V system, the combined short-circuit current is approximately 21.2A. A 30A MPPT charge controller provides the recommended 25% headroom. For a 2S2P configuration into a 24V system, combined Isc drops to roughly 10.6A — a 15A MPPT controller is sufficient, though a 20A controller gives more headroom. MPPT is strongly recommended over PWM for a 400W array to maximize harvest efficiency.

Most likely yes — with an open-circuit voltage of 22.79V per panel, these panels are compatible with 99% of MPPT and PWM charge controllers. Before connecting, verify your controller's maximum PV input voltage exceeds your planned array Voc (22.79V for parallel, 45.58V for 2S2P) and that its maximum current rating covers your array's Isc plus the recommended 25% safety margin.

Real-world daily output depends on your location, season, panel tilt, shading, and system efficiency. As a general estimate, in an area with 4–5 peak sun hours per day, a 400W array can produce roughly 1,200–1,600 Wh (1.2–1.6 kWh) of usable energy per day after accounting for typical system losses. High-sun regions with optimal tilt will produce more; northern or overcast climates will produce less.

Mounting hardware is not included. The panels have pre-drilled holes on the back compatible with Renogy Z-brackets, corner mounts, and tilt mounts, all sold separately. For a flat RV or van roof, Z-brackets are the most common choice and the simplest to install. Tilt mounts can improve output on fixed ground or rooftop installations by angling the panels toward the sun.

Yes. If you wire any panels in parallel, you'll need solar branch (Y) connectors — typically sold as pairs — to combine the positive and negative leads before running a single cable to your charge controller. These are sold separately. If you wire all four panels in series (not a typical configuration for a 12V or 24V system given the resulting high voltage), you simply daisy-chain the positive of one panel to the negative of the next with no branch connectors needed.

Yes. The IP65-rated junction box and IP67-rated connectors seal out moisture in rain and wash-downs. The anodized aluminum alloy frame — over 1.1 mm thick — is rated for snow loads up to 5,400 Pa and wind loads up to 2,400 Pa, making these panels suitable for rooftop use across most North American climates, including areas with heavy snowfall.

The panels use industry-standard IP67-rated solar (MC4-compatible) connectors. Extension cables and adapter kits are not included and are sold separately. When purchasing cables, ensure they are rated for outdoor solar use and sized appropriately for your run length to minimize voltage drop.

Better than most p-PERC alternatives. With a temperature coefficient of −0.29%/°C, these N-Type panels lose less output as rooftop temperatures rise. For comparison, many standard p-PERC panels carry a coefficient of −0.35%/°C or worse, meaning the N-Type panels maintain a meaningful performance advantage on hot sunny days — exactly the conditions when you most want your array producing well.

Yes. The RSP100DC panels are part of Renogy's N-Type solar panel line and can be connected in series or parallel with additional RSP100DC panels or other compatible panels. Before adding more panels, verify that your charge controller's input voltage, current, and power ratings support the expanded array size.

Renogy provides a 10-year material and workmanship warranty and a 25-year output warranty on each panel. Because TrueStead Supply is an authorized Renogy dealer, the full manufacturer warranty applies to panels purchased here.

According to Renogy, the N-Type RSP100DC delivers up to 20W more than a comparably sized p-PERC 100W panel, is approximately 8% lighter, and occupies about 11% less footprint per panel — meaning your 4-panel array fits in the space a p-PERC 4-pack would need while delivering meaningfully more output. The lower temperature coefficient also means less power loss on hot days. The trade-off is a higher upfront cost per panel relative to older p-PERC options.