Anyone else finding their panels absolutely caked in pollen this time of year?

Living on a narrowboat means my panels get a special seasonal coating of tree dandruff, canal algae and whatever the ducks decide to contribute — pollen is honestly the least of my worries. 🦆

That said, I did notice my Victron MPPT was throwing a bit of a sulk last week and sure enough, the panels looked like someone had dusted them with custard powder. A quick once-over with a squeegee and a bucket of canal water (the irony isn't lost on me) and we were back up to respectable numbers.

Worth knowing that even a light pollen film can knock 10-15% off your output — doesn't sound massive until you're on a cloudy April day already scraping the barrel for every watt. On the boat I'm running four 200W panels and that kind of loss genuinely matters when the fridge and inverter are bickering over what's left.

My somewhat scientific cleaning schedule is: whenever I notice the output looks a bit sad and I can be bothered to get the ladder out.

Anyone found a decent water-fed pole setup that works well for awkward roof angles? Roof pitch on a narrowboat is basically zero so I've got that going for me at least, but I imagine anyone with a more aggressive tilt has a proper mission on their hands this time of year.

Ha, @VoltageViking, duck contributions are a whole other category of panel contamination! 😄

I'm on a static setup in the Welsh borders and the oak pollen this spring has been something else — almost like a fine yellow dust that seems to bond to the glass rather than just sitting on top. Lost about 12-15% output over a fortnight without realising what was happening until I actually got up there and had a look.

What I've found works brilliantly is a simple soft brush on a telescopic pole with a bit of warm water — no soaps or detergents needed. Saves clambering about and the panels come up a treat.

Do you find the algae particularly stubborn on the canal? I imagine the moisture environment makes it a recurring battle rather than a one-off clean.

ZoeTaylor | 📍 Welsh Borders | ⚡ 2.4kWp

Ha, @VoltageViking, narrowboat life sounds like a full-time panel-maintenance operation! 😄

I've noticed a proper drop in output this past fortnight — checked my monitoring and it was down about 18% before I finally got up there with a soft brush and some lukewarm water. The yellow-green pollen coating was almost impressive, honestly.

One thing I've started doing is checking the forecast before cleaning — absolutely pointless wiping them down if there's an oak tree upwind and no rain coming. Learned that the hard way last April.

For anyone on static setups near water like @JoeFox55, that algae creep round the edges is sneaky too — it builds up gradually so you barely notice until your generation figures start telling a different story.

Been on the cut for three years now and the pollen season genuinely catches me off guard every single time. April hits and suddenly my Renogy panels look like someone's dusted them with custard powder.

What I've noticed though — and this surprised me — is the rain after a heavy pollen week is sometimes worse than the pollen itself. It bakes into a kind of film rather than washing clean. Had a 15% drop showing on my Victron app last May before I finally got the deck brush out.

@ZoeTaylor the Welsh Borders must be brutal for tree pollen with all that woodland around you. At least your panels aren't also doubling as a duck toilet between cleans. 🦆

I've started keeping a cheap squeegee and a bucket of water on board now — ten minutes every fortnight makes a noticeable difference to the numbers.

LochLinda | 📍 Scotland | ⚡ Static Caravan Off-Grid

Worth noting that pollen loss isn't uniform across panel types — my older polycrystalline panels seemed far more electrostatically attractive to the stuff than the mono half-cut cells I've since added. The textured glass on cheaper panels also traps debris more aggressively.

For anyone quantifying the actual losses: I ran my Victron MPPT logging before and after a proper clean last May and saw a consistent 11-14% recovery in output across a full sunny week. That's not trivial when you're sizing a system tightly.

@RiverSoul the "every year" factor is key — I now just schedule a clean as a fixed calendar event around late April rather than waiting until I notice the drop on the Victron dashboard. Prevention mindset rather than reactive.

Deionised water and a soft brush. Nothing fancy needed.

Had this exact problem last month on the static. Dropped maybe 15-20% output for about two weeks, noticed it on the Victron dashboard before I even went outside to check.

Rainwater doesn't cut it when the pollen's properly baked on — especially after a dry spell. Just need a bucket of water and a soft brush, job done in ten minutes.

@LochLinda curious what panel types you mean — genuinely hadn't considered that made a difference for pollen specifically. My mono panels seem to hold the muck in the texture of the glass more than I'd expect.

Ducks I cannot help you with @VoltageViking, that's a you problem mate 🦆