Martin's 19 Green MoneySaving tips: From water-saving gadgets to getting paid to recycle

Reducing water usage can cut bills for those on water meters, help the environment, and crucially reduce energy costs too, as when you use less water you usually heat less water.Currently, there are over 600,000 free water-saving gadgets available from water firms. What you can get depends on where you live - see free water-saving gadgets.And if you're not on a water meter, you can get one fitted for free in England & Wales. Some - especially in homes with fewer residents than bedrooms - can save a lot. See water meter calc to see if you can save, like John, who tweeted: "@MartinSLewis We're saving around £500 a year, wish we'd done it years ago."

Many high street stores now offer incentives for recycling their old clothes and beauty containers - from £5 for old clothes, to 'free' MAC lipsticks and more. See our Recycling rewards list.

The Chancellor's new NS&I Green Savings Bond lets you save £100 to £100,000, and the money funds green projects. It sounds a great idea, yet we've now learnt it pays just an annual 0.65% and you must lock the money away for 3yrs.

As straight savings, that's weak. Even the top easy-access account from Shawbrook Bank at 0.67% AER variable pays more, and big-name, Goldman Sachs-owned Marcus* pays 0.6% AER variable - only a fraction less. And, if you're willing to lock cash away for three years, you can almost treble the Green Bond rate with JN Bank's 1.81% AER (min £1k). All these have the full UK £85,000 savings safety protection.

So if interest is your core focus, the Green Bond is likely a no-go. Though those with huge amounts of long-term savings using NS&I for safety may want to use it, as it has higher rates than NS&I's alternative accounts.

If green is your main focus, then the NS&I bond does reasonably well. Ecology BS 0.8% AER regular saver (min £25) may beat it (the society uses savers' cash entirely for sustainable purposes), but you can only put up to £3,000/yr in.

There's also Triodos Bank's 1yr 0.4% AER fix (min £500). It pays less, but you lock in shorter. These two are the only savings providers to score more than 15/20 on Ethical Consumer's ratings (though green credentials only make up part of this rating). More analysis and options in our Green savings guide.

Of course, filling a kettle (making no more than you need) and using a flask is cheaper and better. Yet if you like a barista brew, our coffee cup trick info shows where to get the cheapest cups and what you'll save.

Over the last few years, it's been easy to switch to a green energy tariff and slash bills. Sadly, the energy crisis has mostly kiboshed that.Regular MoneySavers will know my current energy mantra is DO NOTHING, as that means you'll either be on, or auto-moved to, your provider's price-capped standard variable tariff, where it's forced to sell you energy below its cost price - there's nowt cheaper.Thankfully, some of the big names do offer 100% renewable electricity on their standard variable tariffs - E.on (incl E.on Next), Octopus and Ovo do, while British Gas and EDF say they're 100% zero carbon (meaning some / all is nuclear generated). Scottish Power and SSE don't. None of these offer renewable or even offset gas.Yet actually the definitions of green energy are murky. Firms can claim to be green by trading off green certificates, rather than by generating energy from renewables.To go closer to true green on gas and electricity, the lowest-priced switchable tariff would be Green Energy UK's (GEUK) 16mth fix (link goes to our 100% renewable elec comparison, you might need to scroll to find it). Yet that is at a huge 40% premium to the price cap - £500/yr extra for someone with typical use. More info in our Green energy guide. MSE UPDATE 4PM THU: GEUK has pulled the tariff above. Its cheapest deal is now fixed for 22mths, but is a typical £900/yr above the price cap.

Refill your water bottle for free. An app shows which cafés, shops etc let you fill up your bottle for free.

While it's getting colder outside, thankfully that doesn't write solar panels off as they're about daylight, not sunshine or temperature (which does mean a marginal gain for those in the southern parts of our isles). And with the energy bills crisis on, and a growing green movement, many are asking us about solar panels, so we've completely updated and rewritten our full Solar panels - are they worth it? guide. Read that if you're serious about it, and here's a quick briefing for those just dallying with the idea...

• The solar panel maths is getting better, though it's worse than it was. Panel prices have dropped over the years, from more than £6,000 for a decent-sized 3.5kW system eight years ago, to under £5,000 now. Plus the price of energy has rocketed, so generating it yourself is a far bigger saving than it was.

  Under the smart export guarantee (SEG) scheme that started in January 2020, while you get paid for putting unused energy back in the grid measured via a smart meter, the prior feed-in tariff (FIT) scheme was far more generous, with higher rates, and payments for generating energy, even if you used it yourself. Having said that, if you've got savings, with interest still so low it's worth doing the numbers for yourself on solar panels, though do check if your home is right for panels.

• The biggest gain comes from using what you generate - up to a £310/year saving per 3.5kW system. Solar panels are best for those who use the electricity as it is generated, as you pay about 21p/kWh for electricity on a price-capped tariff, but will typically only get paid up to 5p/kWh for sending it to the grid under the SEG. So it's a boon for those whose homes have people in during the day, or can set all appliances to work then (or even get battery storage).

  Based on Energy Saving Trust estimates (which we've added an uplift to, to update for the energy bills spike), a typical household can knock between £120/year and £310/year off your bill, depending on system size, electricity use and the tariff you're on. See how big are solar savings?

• You get paid for generating electricity, but SEG tariffs differ widely - up to £125/year for a 3.5kW system. If you export energy to the grid you can be paid for it, but under the new system the rate is no longer fixed or locked in, it depends on the deal the energy firm gives. The rates are 1.5p/kWh to 5p/kWh (more if you have certain batteries). So you need to find the highest payer, though of course the firm's solvency matters too. See who pays the most.

   

• The break-even time is likely to be 11+ years. Based on the Energy Saving Trust's figures (plus the uplift for current prices), the break-even time for typical panels is 11 to 28 years - depending on where you live, the energy you use, if you're at home during the day and more. Use a solar panel calculator to see.

  But remember even that is an estimate, the cost of energy can change, as can what you're paid for generating it, so there is some guess work here.

• If you're likely to move home in the next decade, it probably doesn't add up. Porting panels to a new home is tough and could be costly (and you may not be able to get the SEG with used panels), so they'll likely stay where they are. Whether they add enough value to the house when you sell is questionable. See moving home with panels.

• If you already have solar panels and get the feed-in tariff, nothing changes. The old feed-in tariff (FIT) scheme paid a (generous in the early years) rate that was locked in for at least 20 years from when you started for all the electricity you generate, even if you used it yourself - not just the excess energy you export, like the new SEG scheme. The closure of the FIT scheme for newbies won't affect you if you're already signed up. See feed-in tariff info.

Switching to online-only communications often reduces your bill (eg, BT broadband is £3/bill cheaper), plus the very cheapest deals across a range of sectors are often online-only.

Old mobiles can be noxious - get paid to recycle yours, eg, £150 for an iPhone 8. If your phone is still usable and you're out of contract, don't upgrade, use our Cheap Sim Finder to find what Sim-only package you can get to keep it super-cheap and best for the environment.Yet if you've moved on to a newer, younger model, there are sound environmental reasons to recycle your old mobile handsets, given there are potentially noxious substances as they decay.You could pop the handset on eBay, or for ease, use one of the dozen mobile phone-buying companies out there. To find the best payer, there are comparison sites including Sell My Mobile*, Compare My Mobile* and Compare and Recycle - use at least a couple for the widest possible search.Payment is usually promised via bank transfer within one day of it receiving your phone. If something goes wrong, sadly you've little protection, so do check reviews first. More info in our Recycle my mobile guide.

If someone in your household receives benefits including universal credit, pension credit, carer's allowance or disability living allowance, then there are firms that may provide totally free insulation to homeowners and those in rental properties.Do check it's right for your home though. There are a few horror stories of major damp and mould problems emerging after poor or inappropriate installation (more info in the link).

Two big online supermarkets, Morrisons and Ocado, reduce your bill by 10p for each bag of theirs you return (Ocado will also recycle other brands' bags). So if you've a cupboard full of bags you don't reuse, hand them back for a discount off your grocery order.

A new scheme is designed to help cover some of the costs of installing low-carbon heating. The main example being efficient air-sourced heat pumps, which use heat energy from outside (even when cold) and compressor tech to bring it into your home.

It starts in April 2022, and is capped at 30,000 homes, so early prep should help your chances of securing it if it's right for you. More details in our £5,000 heating grant scheme news story, and see other energy-saving grants.

Around 7m tonnes of food are thrown away each year in the UK. Many wrongly chuck food that's still edible, due to misunderstanding the difference between best-before and use-by dates.- Use-by is a health issue. Don't eat anything beyond that date, as it's risky, even if it looks and smells fine, so it's best to bin.- Best-before is just the manufacturer's view of when it's no longer at its optimum quality. Use your eyes and nose to check if it's safe to consume. In fact, there are beyond best-before online shops which offer substantial savings

Giveaway sites such as Freecycle and Freegle can be a great way to recycle unwanted items, as well as save some cash. Our Freecycle and Freegle guide shows you how to furnish your home and bag the best items, as well as give away your own goods to a good home.It paid off for Andrew, who tweeted: "@MoneySavingExp I got a perfectly decent set of golf clubs on the Oxford Freecycle group." Sadly though, there's no one on Freecycle who can take shots for you to improve your round (I've checked).

I've long stopped being surprised about people worried that fitting a smart meter will 'cost me more'. I think much of this is based on a confusion.

A smart meter lets you monitor your energy usage up to the minute, and this helps you realise where you're overspending - making it easier to reduce your usage. It also automates meter readings for you, saving you time. See Smart meters pros and cons.

I was one of those who railed about the shambolic, rushed, initial roll-out of smart meters that wasted billions installing meters too soon, so that when people switched, they reverted to being dumb meters. The unnecessary cost was added to all our bills. My suspicion is many translated this into 'smart meters will cost me'

Yet as an individual, the meters are free for most, and you're paying collectively for them whether you get one or not. Thankfully, all new models fitted now stay smart when you switch.While, like anything, smart meters and their installation are far from faultless, most feedback I usually get is, on balance, positive, and in a quick Twitter poll I did, about a third said they help reduce bills.

The average length of a car journey in the UK is 8.4 miles. Think before you get behind the wheel - could you walk, cycle or use public transport instead? Do see our 12 MoneySaving tips for cyclists, which can help cut the costs.Or if you're a glutton for punishment like me, take the 10,000 steps a day challenge and walk everywhere. I do it more for health, mental health and obsession than to be green, but it helps. Yesterday I hit five years since I last missed 10,000 steps a day, even with operations, lockdown and sickness. I've done 44,900,000 steps since, averaging 24,600 a day.

Investing isn't my bag, so I won't (and indeed can't) tell you where to put your funds. Yet to create change, money talks, so if you have investments, and feel a passion for environment issues, doing research to ensure your money isn't going to firms that harm the environment can work.

This is also crucial with your pension. Most people are passive with their pensions, but pension funds decide where trillions of pounds go, so putting pressure on yours has an impact. If that interests you, the MakeMyMoneyMatter campaign has information on how to do just that.

Running an EV is certainly better for the environment (I'll steer clear of the debate about manufacture) and indeed there have been some good EV tariffs available, all 100% renewable, with special cheap charging overnight rates.Yet again though, sadly the energy crisis has put a stop to that. We've crunched the numbers in our EV energy tariffs guide and for most they don't add up right now, so there's no point switching to one - you'd be better off on a price-capped tariff. For a few, the Octopus Go EV tariff can just beat the price cap if you use it perfectly.

We just heard about this, and it seems to check out. Every 100 times this 31-second This Song Plants Trees is streamed on Spotify, the money earned is used to plant a tree via the Eden Reforestation Project. So why not add it to your playlists?

PS: I didn't include carbon offsetting in the main tips, as it's not MoneySaving, but then again, nor is giving to charity, and I support that - so a wee addendum to show a few options seemed a good balance.

Cutting emissions is of course more powerful than offsetting, and some see it as greenwashing guilt away.

Yet planting trees and funding green projects can be helpful, so if you want to very roughly calculate your footprint, Carbon Click and Climate Care are among the big world sites. You can then pay there, or perhaps donate to the Woodland Trust charity to get trees planted in the UK.

Everyone should know where theirs is - it's the mains water off-switch. Winter is a crucial time, as if your pipes freeze and burst, you'll need to turn the water off to prevent huge damage, which can cost thousands to repair. See how to turn your water off.

Everyone should know where theirs is - it's the mains water off-switch. Winter is a crucial time, as if your pipes freeze and burst, you'll need to turn the water off to prevent huge damage, which can cost thousands to repair. See how to turn your water off.