What are the current cheapest ( LFP cells $/kWh ) (LFP BMS $/100A) (Grid tie inverter $/kW) (Solar panels $/W)

Been keeping an eye on this lately for my van build and the prices have shifted quite a bit recently.

LFP cells — EVE 280Ah cells seem to still be the go-to benchmark. Seeing them around £0.07-0.08/Wh shipped from Dokan/AliExpress if you're buying a set of 8+. Fogstar Drift cells work out pricier but you've got UK warranty peace of mind.

BMS — JK BMS is still solid value around £40-50 for 100A active balancer units. Hard to beat honestly.

Solar panels — picked up some 400W monos recently for around £0.12-0.15/W from a UK trade supplier clearance. Bifacial is creeping down too.

Grid tie inverters — less experience here as I'm purely off-grid, but I know Deye and Solis are the names people mention for decent £/kW ratios. Anyone running those?

Curious what others are actually paying right now — especially on cells. Prices seem to fluctuate wildly depending on whether you're buying direct from China or going through a UK distributor.

Anyone spotted anything better than EVE for the cell price per kWh lately? Heard CATL Grade A cells are becoming more accessible but haven't pulled the trigger myself.

EVE 280Ah are sitting around £0.07–0.08/Wh if you catch a Fogstar or CATL batch sale, though I swear the price changes every time I refresh AliExpress mid-coffee — grabbed a 16S pack last spring and the same cells were 12% dearer by the time I'd finished my biscuit.

Panels are almost embarrassingly cheap right now — my static caravan array cost more in mounting brackets than the actual glass.

Good data points, but worth being precise about the £/Wh vs $/kWh distinction — the thread title mixes units which causes confusion.

On the narrowboat I run 16x EVE 304Ah cells (the graded cells from Docan via AliExpress), paid approximately £0.065/Wh landed including DHL shipping roughly 18 months ago. Current pricing appears to have crept up slightly due to sterling weakening against the yuan.

BMS — JK BMS 200A units are consistently around £45–55 delivered from UK sellers, which works out roughly £22–27/100A. Far better value than Daly for active balancing capability.

Solar panels — Renogy and similar 400W panels are hovering around £0.12–0.15/W retail UK. Wholesale direct from manufacturers obviously lower but minimum order quantities make that impractical for most individuals.

Grid-tie inverters I have no direct experience with — narrowboat system is entirely off-grid island mode.

@DefenderAdventure fair point on units but meanwhile my Victron Multiplus is sat there judging me for still running 2019-era panels at £0.18/W when you can now grab decent 400W+ mono panels for £0.40–0.50 per panel from the usual suspects on AliExpress if you're buying in quantity — roughly £0.10–0.12/W landed.

BMS-wise, a JK 200A is basically impulse-buy territory now at ~£45–55 — no excuse for running naked cells anymore, people.

@DefenderAdventure has a point on units but let's not derail into pedantry.

From my tiny house build last year, rough ballpark in £/Wh (which is just $/kWh ÷ ~1000 adjusted for exchange):

Panels have dropped noticeably — was paying £0.22/W on Renogy 18 months back. Chinese cells via Fogstar Drift are probably the sweet spot right now without the aliexpress lottery.

Grid-tie inverters are where I'd watch closely — Deye has undercut Solis recently on the 3–5kW range specifically.

@CaddyProject would love to see those numbers from your tiny house build actually — that's exactly the comparison I'm trying to make right now.

For my own tiny house I've been quoted some wildly varying prices for EVE cells depending on whether I go through a UK reseller or direct from Aliexpress with the group buy risk attached. The spread is pretty significant.

Anyone got recent Fogstar pricing on their 280Ah cells vs going direct? I keep seeing Fogstar recommended for UK buyers wanting some kind of recourse if cells arrive out of spec, but wondering if that premium is actually worth it over just taking the gamble on a direct order.

Also — is the 280Ah still the sweet spot or have the 304Ah cells shifted the value equation recently?