RENOGY 40A DC-DC Battery Charger with MPPT
Sold by Renogy UK
From £109.99
Renogy UK's price when we last checked, on 2 September 2026. They run promotions and price by variant, so confirm the current price on their page before you buy.
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Overview
RENOGY 40A DC-DC Battery Charger with MPPT
40A of alternator charging plus an MPPT solar input, in a 1.2kg case. The lightest and most compact way to get both charge sources into one unit — useful when the electrical cupboard is already full.
- 40A maximum output, 584W
- MPPT solar input, 10–30V DC
- Euro 6 smart alternators, 12–16V input; traditional 13.2–16V
- 10mA idle consumption
- 1.2kg, 195 × 149 × 48mm
- Heat-sink cooled, IP31
Check your panel voltage
The solar input accepts 10–30V DC. That comfortably covers one or two 12V nominal panels in parallel, but a pair of panels in series will exceed it on a cold, bright morning when open-circuit voltage peaks. If you are planning a series string, either wire in parallel instead or choose a controller with a higher input ceiling.
Very low idle draw
10mA at idle is genuinely low — about a quarter of an amp-hour a day. For a van that sits for weeks between trips, that matters more than most spec-sheet numbers, because parasitic drain is what flattens banks over winter.
Before you order
IP31 and an operating range of −20°C to 45°C mean this belongs inside the habitation space, not underfloor or in a wet locker. Fuses are specified at 60A input and 50A output.
Renogy's published figures
Taken from Renogy's own specification for this product, on the date shown by the price. Anything wired into 230V mains should be signed off by a qualified electrician.
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