My garden office solar setup — 1 year review

That's a solid year you've had there. The 150/10 paired with 1.6kW is genuinely one of the most practical combinations I've seen — you're getting decent winter performance without the overhead of managing a bigger system in a garden office context.

Curious how you've found the battery side of things across the seasons? I'm running a similar array on my motorhome setup and the winter generation drop is brutal, but I've noticed the controller handles partial cloud really well compared to cheaper units. The Victron tracking is noticeably smoother than cheaper PWM alternatives.

How are you handling the office loads? If you're running it purely off-grid or just supplementing grid, that'll shift whether you're actually in the sweet spot or pushing it. I've seen quite a few garden office setups where people underestimate their actual winter demand — especially if you're heating it or running any heavier kit alongside the standard computing gear.

Nice setup, @WezFrost. That's pretty much my thinking too — 1.6kW is the Goldilocks zone for garden stuff without going mental on the battery side.

How are you finding the 150/10 handling the winter dips? I've got similar wattage on my cabin and honestly the controller's never really stressed, even when I'm getting maybe 60% of summer generation on a grey day.

Curious what your battery bank looks like — that's usually where people either get it spot on or realise they've massively over/underspecced. The Victron gear is so reliable it almost makes you forget to check on it, which I reckon is the whole point.

What're you actually running from it day to day? Just the office equipment or are you doing full cabin power as well?

The 150/10 pairing is genuinely sensible — I've gone similar on the narrowboat with a 1.5kW array and it's the real workhorse combination. Where you'll see the actual value over a year is in the consistency rather than peak days.

One thing worth flagging though: what's your battery capacity sitting at? I found the real limitation isn't the panels or the charge controller, it's the storage. The 150/10 will happily push 150A into decent lithium, but if you're running lead-acid or undersized LiFePO4, you're throttling yourself without realising it. On cloudy weeks, that charge current matters far less than having enough stored electrons from the decent days.

Also curious about your cable runs from array to controller — if you're over about 20m, you'll want to check you're not losing efficiency through voltage drop. Easy to overlook on garden setups since the runs can be longer than you'd plan.

The 30° tilt is spot on for year-round UK generation. Some folk get seduced by summer angles and wonder why winter's a slog.

That 150/10 is a proper workhorse, isn't it. I've got one on my cabin setup with a smaller array and it just does its job without faffing about. The MPPTs from Victron are built different.

1.6kW is spot on for garden offices — enough to actually run things without oversizing the battery bank. What battery are you using? That's where most people go wrong, pairing decent panels with some ancient lead-acid and wondering why it's not working properly.

The 30° tilt is the sweet spot too. Some folk overthink the seasonal adjustments and it's just not worth it for a fixed array unless you're chasing every last watt.

Curious how you're finding it through winter though — have you had any shady periods from trees or buildings? That's where I see most garden setups struggle.

Cheers for sharing this @WezFrost — really helpful to see a full year of data. Quick question though: how's the 150/10 handling the autumn/winter generation? I'm looking at something similar for a shepherd's hut I'm converting, and I'm wondering if that 10A limit becomes a bottleneck when you've got four panels in lower light conditions.

Also curious about your battery setup — what voltage are you running? I've been torn between sticking with 12V (simpler, cheaper) versus going 24V for the sake of efficiency over longer cable runs.

The 30° tilt seems spot on for UK angles, but @AshWalker — did you adjust yours differently for the narrowboat? I'd imagine the constraints are quite different. I'm thinking about seasonal adjustments for the hut but wondering if it's actually worth the faff.

The 150/10 is bulletproof for that array size, though I'd be curious about your battery bank capacity. I'm running similar on the boat with 4x400W and a 200Ah LiFePO4, and the limiting factor isn't the controller—it's how fast you can absorb that midday peak. What's your storage setup like?

@WezFrost, solid setup. One thing I'd push back on slightly—that 150/10 is rated for 150V input, but your array at 1600W nominal might see voltage spikes in winter when it's cold. What's your actual open-circuit voltage? I'd want to verify you're not leaving performance on the table, especially during those shorter December days when every watt counts.

The 150/10 is indeed solid for that spec, but @SaltyRanger's got a point worth considering—what's your actual string voltage under load? 4x400W can push closer to limits depending on panel Voc ratings and temperature. Also curious what battery chemistry you're using; makes a real difference to charge profile optimisation on Victron gear.

Yeah @SaltyRanger's right to flag that. 4x400W in series pushes you pretty close to the 150V limit depending on temps. What's your actual open circuit voltage reading in winter? I'm running similar with my office setup and went with the 250/16 just for headroom—peace of mind's worth it when you're remote.